AbrariAbrari
Practice
Menu
PapersTopicsTextbooksCOC / TVET

Unofficial practice · EUEE

2016 E.C. Chemistry EUEE past paper

67 questions · 2016 E.C. / 2024 G.C. · Natural stream · unofficial

Unofficial practice for the 2016 E.C. / 2024 G.C. Chemistry Ethiopian University Entrance Exam (EUEE / matric). 67 question stems from the Abrari bank are listed below. Not an official Ministry, EAES, MoLS, or OCACC paper.

ይሞክሩ · Try 5

Try 5 Chemistry questions

5 የኬሚስትሪ ጥያቄዎች

መግቢያ አያስፈልግም · No sign-in needed

Unofficial EUEE past-paper items. Not an official key.

1 / 5chemistryHydrocarbons

What are the molecular formulae of an alkene and alkyne containing seven carbon atoms, respectively?

Unofficial practice. Abrari is an independent study aid and is not affiliated with, endorsed by, or an official product of the Ethiopian Ministry of Education (MoE), EAES, MoLS, or OCACC. Answers are Abrari keys, not an official marking scheme.

Related study

Grade 12 Chemistry textbookChemistry exam topicsFull Chemistry practice

Other Chemistry papers

Questions on this paper

Stems are visible for study. Worked solutions stay inside each item and are unofficial.

Q1 · Hydrocarbons

What are the molecular formulae of an alkene and alkyne containing seven carbon atoms, respectively?
  1. A. C7H14 and C7H12
  2. B. C7H16 and C7H14
  3. C. C7H14 and C7H16
  4. D. C7H12 and C7H14
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q2 · Preparation of alkenes

Which of the following is the CORRECT method of preparation of alkenes in the laboratory?
  1. A. Alkylation of sodium acetylide with a primary alkyl halide.
  2. B. Heating of sodium salt of an organic acid with soda lime.
  3. C. Reaction of halogenated alkane with sodium.
  4. D. Dehydration of alcohols with concentrated sulfuric acid.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q4 · Crude oil

Which of the following is the product of fractional distillation of crude oil?
  1. A. Producer gas
  2. B. Naphthalene
  3. C. Water gas
  4. D. Kerosene
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q5 · Carboxylic acids

What is the molecular formula and IUPAC name of a saturated monocarboxylic acid having six carbon atoms?
  1. A. C5H11COOH, heptanoic acid
  2. B. C6H13COOH, heptanoic acid
  3. C. C5H11COOH, hexanoic acid
  4. D. C6H13COOH, hexanoic acid
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q7 · Significant figures

During summer, the average value for the temperature measured in a certain chemistry laboratory is 298.15 K. How many decimal places are there in the measured value?
  1. A. 5
  2. B. 3
  3. C. 2
  4. D. 1
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q8 · Lewis structures

Which of the following is the CORRECT Lewis electron-dot symbol of MgO? (Atomic number: Mg = 12 and O = 8)
  1. A. Mg+ and O 2- (dots)
  2. B. Mg+2 and O - (dots)
  3. C. Mg+ and O - (dots)
  4. D. Mg+2 and O 2- (dots)
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q9 · Solubility

A student collected four beakers and added naphthalene, graphite, iodine and alcohol respectively, added equal volumes of water to each and shook. Which is the observation?
  1. A. There will be dissolution in the first three beakers.
  2. B. Water will dissolve iodine rather than graphite.
  3. C. Water will dissolve the whole given chemicals in the four beakers.
  4. D. There will be dissolution of alcohol in the fourth beaker.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q10 · Reversible reactions

Which of the following explanations about reversible and irreversible reactions is CORRECT?
  1. A. A reaction that has only a forward reaction or a reverse reaction is known as a reversible chemical reaction.
  2. B. A reaction that proceeds from reactant to product and from product to reactant is known as an irreversible reaction.
  3. C. Chemical reactions that proceed only towards the formation of a product are known as irreversible reactions.
  4. D. Chemical reactions that proceed only towards the formation of a product are known as reversible reactions.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q11 · Haber process

Which of the following is the CORRECT sequence involved during the industrial production of ammonia using the Haber process? (Step 1: electrolysis of water and fractional distillation of air; Step 2: passing hot mixture of gases through a condenser; Step 3: introducing hydrogen and nitrogen into a chamber with iron at 300-500 C and 15-25 MPa)
  1. A. Step 1 -> Step 3 -> Step 2
  2. B. Step 2 -> Step 3 -> Step 1
  3. C. Step 2 -> Step 1 -> Step 3
  4. D. Step 1 -> Step 2 -> Step 3
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q12 · Nitric acid properties

Which of the following is a physical property of nitric acid, HNO3?
  1. A. On exposure to light, it turns brown.
  2. B. Nitric acid is a corrosive chemical.
  3. C. Nitric acid has a pungent smell.
  4. D. It forms large number of salts.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q13 · Herbicides

Which of the following is the CORRECT explanation about herbicides?
  1. A. Selective herbicides control specific weed species, leaving the desired crop unharmed.
  2. B. Organochlorine compounds are the most common herbicide substances.
  3. C. Herbicides are substances that are used to control unwanted insects.
  4. D. Herbicides are substances that are used to enhance the growth of important plants.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q14 · Fermentation (Araki)

Which of the following is the correct procedure for the preparation of Araki? (Step 1: distillation; Step 2: adding water to dough and fermenting 1-2 days; Step 3: Bikel and Tinsess starter preparation and fermentation; Step 4: baking bread and mixing with fermented starter)
  1. A. Step 2 -> Step 4 -> Step 3 -> Step 1
  2. B. Step 2 -> Step 3 -> Step 4 -> Step 1
  3. C. Step 3 -> Step 4 -> Step 2 -> Step 1
  4. D. Step 4 -> Step 3 -> Step 2 -> Step 1
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q15 · Polymers

Which one of the following synthetic polymers is used to make squeeze bottles, plastic wrapping and electrical insulation?
  1. A. Polypropylene
  2. B. Polymethyl methacrylate
  3. C. Polyvinylchloride
  4. D. Polyethylene
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q16 · Covalent compounds

Which of the following descriptions of the property of a covalent compound is CORRECT?
  1. A. Covalent compounds have low melting and boiling points.
  2. B. Most covalent compounds are solids at room temperature.
  3. C. Most covalent compounds are soluble in water.
  4. D. Covalent compounds are non-volatile.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q17 · Intermolecular forces

The attractive force between molecules is known as _________.
  1. A. nuclear force
  2. B. intermolecular force
  3. C. lattice force
  4. D. intramolecular forces
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q18 · Molecular geometry

The hybridization of the central atom xenon (Xe) in XeF4 is sp3d2. Which of the following is the shape of XeF4?
  1. A. Octahedral
  2. B. Square planar
  3. C. Tetrahedral
  4. D. Seesaw shape
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q20 · Reaction rates

For N2(g) + O2(g) -> 2NO(g), if the rate of disappearance of N2 is 2.5 x 10-6 M/s, what is the rate of formation of NO?
  1. A. 5.0 x 10-6 M/s
  2. B. 1.25 x 10-3 M/s
  3. C. 2.50 x 10-3 M/s
  4. D. 2.50 x 10-6 M/s
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q21 · Lewis acids

Which of the following is a Lewis acid?
  1. A. SO42-
  2. B. SO32-
  3. C. BF3
  4. D. NH3
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q22 · Acid ionization constant

The pH of a 0.10 M solution of an aqueous solution of a certain acid is 3. What is the value of acid ionization constant (Ka) of this acid?
  1. A. 1.0 x 10-7
  2. B. 1.0 x 10-5
  3. C. 1.0 x 10-3
  4. D. 1.0 x 101
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q23 · Common-ion effect

The shift in the position of equilibrium caused by the addition of an ion already involved in the reaction is known as _________.
  1. A. common-ion effect
  2. B. buffer-ion effect
  3. C. hydrolysis-effect
  4. D. titration-effect
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q24 · Equivalents of acids/bases

Which of the following is CORRECT about equivalents of acids and bases?
  1. A. The volume of an acid or base required to reach equivalence point during acid-base titration reaction.
  2. B. The number of moles of an acid or base required to form a one molar aqueous acidic or basic solution.
  3. C. It is the amount of a substance that is required to react with one mole of hydroxide ions in redox reactions.
  4. D. It is the amount of a substance that is required to react with one mole of hydrogen ions in acid-base reactions.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q25 · Normality

A 250 mL solution is formed from 24.5 g of sulfuric acid (H2SO4). What is the normality of this solution? (Mol. wt. H2SO4 = 98 g/mol)
  1. A. 4.00 N
  2. B. 2.00 N
  3. C. 0.250 N
  4. D. 0.125 N
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q26 · Preparation of bases

Which of the following reaction is used for the preparation of bases?
  1. A. Reaction of metal hydroxides with dilute acids.
  2. B. Reaction of active metal oxides with water
  3. C. Heating of a salt with a non-volatile acid.
  4. D. Heating of carbonates with dilute acids.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q27 · Salts/water treatment

Which of the following salts is used in the treatment of waste water?
  1. A. CaCO3
  2. B. BaSO4
  3. C. FeCl3
  4. D. KNO3
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q28 · Strong vs weak acids

A student dissolved 10 mL concentrated HCl in the first beaker and 10 mL concentrated CH3COOH in the second (each with 100 mL water). Which of the following would occur?
  1. A. In the first beaker, a large fraction of HCl dissociates into ions and in the second beaker, a small fraction of CH3COOH dissociates into ions.
  2. B. In the first beaker, a small fraction of HCl dissociates into ions and in the second beaker, a large fraction of CH3COOH dissociates into ions.
  3. C. There is no dissociation or ionization of the HCl and CH3COOH in both the first and second beakers.
  4. D. The amount of HCl dissociated in the first beaker and the amount of CH3COOH dissociated in the second beaker are identical.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q29 · Aluminum extraction

Which of the following is the CORRECT sequence of production of aluminum from bauxite by the Hall process? (I: treating sodium silicate/aluminate solution with acid; II: heating aluminum oxide in furnace; III: heating ore with NaOH; IV: conversion of aluminum oxide to soluble sodium aluminate; V: electrolysis of molten cryolite and aluminum oxide)
  1. A. III, IV, I, II and V
  2. B. IV, II, I, III and V
  3. C. V, I, II, IV and III
  4. D. II, I, III, IV and V
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q30 · Food preservation

Which of the following food preservation methods leaves a product without loss of aroma or flavor?
  1. A. Vacuum-packing
  2. B. Freeze-drying
  3. C. Freezing
  4. D. Melting
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q31 · Periodic table blocks

The electronic configuration of an element is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5. In which block does this element belong?
  1. A. f-block
  2. B. d-block
  3. C. p-block
  4. D. s-block
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q33 · Covalent bonding

Which of the following is CORRECT about the formation of a covalent bond? A covalent bond is formed
  1. A. between positively and negatively charged ions.
  2. B. between mobile and stationary electrons.
  3. C. by the sharing of valence electrons.
  4. D. by the transfer of valence electrons.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q34 · Molecular polarity

CCl4 has four polar C-Cl bonds but is a non-polar molecule. Which of the following explains this?
  1. A. The molecule is non-polar because of the presence of four polar C-Cl bonds in the molecule.
  2. B. The molecule is non-polar because of the difference in electronegativity between carbon and chlorine.
  3. C. Even though the bond in CCl4 is polar, the net dipole moment of the molecule is different from zero.
  4. D. Even though the bond in CCl4 is polar, the net dipole moment of the molecule is zero.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q35 · Hydrogen bonding

Which of the following is responsible for the unusual high boiling points of HF, H2O and NH3?
  1. A. London dispersion forces
  2. B. Hydrogen bonding
  3. C. Covalent bonding
  4. D. Ionic bonding
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q36 · Kinetic molecular theory

From the assumption of kinetic molecular theory of gases, which of the following is CORRECT?
  1. A. The pressure of a gas is the effect of the negligible volume of the gas compared to the total volume of the gas.
  2. B. The average kinetic energy of gas particles is inversely proportional to the absolute temperature of the gas.
  3. C. There are some forces of attraction or repulsion between gas particles.
  4. D. Under ordinary conditions, the total volume of gas molecules is much smaller than the total volume of gas.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q37 · Phase changes

Which of the following is CORRECT about the phase change observed in water?
  1. A. Water starts to evaporate at the boiling point and condenses at the melting point.
  2. B. When a solid ice is heated, it is changed to liquid water without melting.
  3. C. At the boiling point temperature, water exists in three different physical states.
  4. D. At the melting point of ice, the temperature remains constant.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q38 · Subatomic particles

Which of the following is the CORRECT comparison of the absolute masses of protons, electrons and neutrons?
  1. A. Mass of e- > mass of p+ = mass of n0
  2. B. Mass of e- = mass of p+ > mass of n0
  3. C. Mass of e- < mass of p+ < mass of n0
  4. D. Mass of e- > mass of p+ > mass of n0
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q39 · Periodic groups

In the modern periodic table, what is the name of the group that contains the most electronegative elements?
  1. A. Alkali
  2. B. Halogens
  3. C. Chalcogens
  4. D. Noble gases
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q40 · Metallic character

A given element has atomic number of 55 and mass number of 133. Which of the following describes CORRECTLY the property of this element?
  1. A. The non-metallic character of the element is high.
  2. B. The metallic character of the element is high.
  3. C. The element has high electron affinity.
  4. D. The element has high electronegativity.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q43 · Reaction quotient

For N2(g)+3H2(g) equilibrium 2NH3(g) with Kc=12.4, [N2]=2.0 M, [H2]=2.0 M and [NH3]=10.0 M, to which direction will the reaction proceed?
  1. A. The reaction will proceed to the reverse direction.
  2. B. The reaction is at a chemical equilibrium.
  3. C. The equilibrium is independent of the concentration.
  4. D. The reaction will proceed to the forward direction.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q45 · Oxidation of alcohol

Upon standing long, Tella or Tej turns sour. Which of the following is the CORRECT explanation for the observed effect?
  1. A. The reduction of alcohol to an acid.
  2. B. The oxidation of alcohol to an acid.
  3. C. Addition reaction of alcohol with an acid.
  4. D. Decomposition reaction of alcohol.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q46 · Experimental method

Which of the following is the CORRECT procedure for determining the content of a leaf? (Step 1: dry leaves; Step 2: evaluate and conclude; Step 3: collect leaves; Step 4: boil and collect extract; Step 5: analyze with instrument)
  1. A. Steps: 3 -> 5 -> 4 -> 1 -> 2
  2. B. Steps: 3 -> 4 -> 1 -> 5 -> 2
  3. C. Steps: 3 -> 1 -> 4 -> 5 -> 2
  4. D. Steps: 3 -> 1 -> 5 -> 4 -> 2
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q47 · Electromagnetic radiation

Which of the following characteristics of an electromagnetic radiation is CORRECT?
  1. A. The speed of an electromagnetic radiation decreases with increase in its wavelength.
  2. B. The speed of an electromagnetic radiation increases with increase in its frequency.
  3. C. The speed of an electromagnetic wave is independent of the nature of the medium it travels through.
  4. D. The wave length of an electromagnetic radiation is directly proportional to its frequency.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q48 · Bohr's theory

'The hydrogen atom moves in a fixed circular orbit associated with allowable energy states' This is called ____.
  1. A. Planck's theory
  2. B. Bohr's theory
  3. C. Pauli's principle
  4. D. Aufbau's principle
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q49 · Electron configuration of ions

Which of the following is the core electron configuration of the metal ion in ferric sulfate, Fe2(SO4)3? (Atomic Number of Fe = 26)
  1. A. [Ar]4s23d6
  2. B. [Ar]4s13d6
  3. C. [Ar]3d6
  4. D. [Ar]3d5
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q50 · Chemical bonding

A chemical bond that results from the attractive force between shared electrons and nonmetal nucleus is called _____.
  1. A. covalent bond
  2. B. ionic bond
  3. C. hydrogen bond
  4. D. metallic bond
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q51 · Peroxides

Which of the following is peroxide?
  1. A. ZnO
  2. B. FeO
  3. C. K2O
  4. D. CaO2
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q52 · Ternary acids

Among the following which one is a ternary acid?
  1. A. HBr
  2. B. HCl
  3. C. H2SO4
  4. D. H2S
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q56 · Redox reactions

For H2S + HNO3 -> S + NO + H2O, which of the following is CORRECT?
  1. A. The oxidation number of N is increased.
  2. B. The oxidation number of S is decreased.
  3. C. S is a reducing substance.
  4. D. HNO3 is an oxidizing agent.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q58 · Electrolytes

Which of the following is CORRECT about molten electrolytes and aqueous electrolytes?
  1. A. The possible half reactions in molten electrolytes are more compared to aqueous electrolytes.
  2. B. Both molten and aqueous electrolytes involve preferential discharge of ions at each electrode.
  3. C. An electrolyte that conducts electricity when dissolved in a certain liquid is molten electrolyte.
  4. D. During the electrolysis of a molten electrolyte, the reduction of cations occurs at the cathode.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q59 · Applications of electrochemistry

Which of the following is NOT the industrial application of electrochemistry?
  1. A. Electrolytic refining
  2. B. Electroplating
  3. C. Electromagnetism
  4. D. Electro synthesis
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q60 · Chemical industries

Which of the following chemical industries is INCORRECTLY matched with its products?
  1. A. Textile industry- glasses
  2. B. Beverage industry- alcohols
  3. C. Food industry- Biscuits
  4. D. Paper industry- cartons
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q61 · Conservation of mass

A student mixed AgNO3 and NaCl solutions and found m1=m2 and recorded m3. Which one of the following laws is investigated by this trial?
  1. A. Law of definite composition
  2. B. Law of multiple proportions
  3. C. Law of conservation of energy
  4. D. Law of conservation of mass
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q62 · Exothermic reactions

A chemical reaction that releases heat energy to the surrounding is known as _____.
  1. A. exothermic reaction
  2. B. endothermic reaction
  3. C. decomposition reaction
  4. D. combination reaction
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q63 · Types of reactions

A type of reaction in which two compounds react together to form two or more products by exchanging reactant ions is known as _____________.
  1. A. Decomposition reaction
  2. B. Combination reaction
  3. C. Double Displacement reaction
  4. D. Single Displacement reaction
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q64 · Gas laws

'At a given temperature and pressure, equal volumes of different gases contain equal number of molecules', this is known as _______
  1. A. Charle's law
  2. B. Boyle's law
  3. C. Gay Lussac's law
  4. D. Avogadro's law
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q65 · Reaction conditions

Which of the following includes the preconditions required for a chemical reaction to occur?
  1. A. Temperature, activation energy, proper orientation
  2. B. Temperature, pressure and proper orientation
  3. C. Activation energy, proper orientation and collision between reactants
  4. D. Activation energy, pressure and collision between reactants
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q66 · Decomposition reactions

For ZnCO3(s) -> ZnO(s) + CO2(g), the chemical reaction is classified as
  1. A. decomposition reaction
  2. B. combination reaction
  3. C. double displacement reaction
  4. D. single displacement reaction
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q68 · Combined gas law

A sample of gas has a volume of 100 L at 27 C and 750 torr. The gas is expanded to a volume of 250 L at 200 torr. What is the final temperature of the gas?
  1. A. -83 C
  2. B. -73 C
  3. C. -17 C
  4. D. -273 C
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q69 · Phase transitions

Which of the following is a CORRECT explanation of the given term?
  1. A. Boiling point is the temperature at which the vapor pressure of the liquid equals the atmospheric pressure.
  2. B. Condensation is the process by which a liquid changes to a gas at the boiling point of the liquid.
  3. C. Normal boiling point is the temperature at which the liquid starts to be converted to the gaseous state.
  4. D. Heat of vaporization is the energy required to convert one gram of a solid to a gas at its boiling point.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q70 · Alkene formula

Which of the following is the general formula of alkenes?
  1. A. CnH2n-2
  2. B. CnH2n+2
  3. C. CnHn
  4. D. CnH2n
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q71 · Polymerization

What are the two types of polymerizations?
  1. A. Condensation and substitution polymerizations
  2. B. Addition and decomposition polymerizations
  3. C. Condensation and displacement polymerizations
  4. D. Addition and condensation polymerizations
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q72 · Natural rubber

Which of the following is a monomer of natural rubber?
  1. A. Ethylene terephthalate
  2. B. Styrene
  3. C. Hexamethylene diamine
  4. D. Isoprene
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q73 · Environment

The component of the environment consisting earth's upper outer most skin, and accessible to human beings is known as _____.
  1. A. biosphere
  2. B. lithosphere
  3. C. hydrosphere
  4. D. atmosphere
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q74 · Nitrogen cycle

Which of the following is the CORRECT sequence in the nitrogen cycle? (Step 1: reduction of nitrate by microbial action; Step 2: fixation by bacteria/algae; Step 3: nitrification by nitrosomonas and nitrobacter; Step 4: denitrification)
  1. A. Step 2 -> Step 3 -> Step 4 -> Step 1
  2. B. Step 1 -> Step 2 -> Step 3 -> Step 4
  3. C. Step 2 -> Step 3 -> Step 1 -> Step 4
  4. D. Step 1 -> Step 3 -> Step 4 -> Step 2
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q75 · Pollution

Some hazardous substances damage and create unwanted changes in air, water, soil or any other natural resource. The resulting change created is known as:
  1. A. afforestation
  2. B. pollution
  3. C. greenhouse effect
  4. D. global warming
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q76 · Heterogeneous equilibrium

For CaCO3(s) equilibrium CaO(s) + CO2(g), what is the equilibrium constant expression?
  1. A. Kc = [CaO][CO2]
  2. B. Kc = [CaO][CO2]/[CaCO3]
  3. C. Kc = [CO2]
  4. D. Kc = [CaO]/[CaCO3]
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q77 · Carboxylic acid reactions

Which of the following statements is CORRECT regarding the properties of monocarboxylic acids?
  1. A. Carboxylic acids react with active metals to form salt and hydrogen gas.
  2. B. The hydrolysis of carboxylic acids in water produces an ester and water.
  3. C. Carboxylic acids react with strong bases to form esters and water.
  4. D. Heating of carboxylic acid with alcohol produces salt and water.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q79 · VSEPR theory

A water molecule has two bond pairs and two lone pairs of electrons. Which of the following is CORRECT about these pairs of electrons?
  1. A. The repulsion between the two bonding pairs is greater than the repulsion between the two lone pairs.
  2. B. The repulsion between the two lone pairs is greater than the repulsion between the two bonding pairs.
  3. C. Bonding pair - lone pair repulsion is greater than lone pair - lone pair repulsion.
  4. D. Lone pair - lone pair repulsion is exactly identical with bonding pair - bonding pair repulsion.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q80 · Conjugate acids and bases

Which of the following CORRECTLY describes conjugate acids and conjugate bases?
  1. A. Conjugate acid is a species formed after a removal of a proton from a base whereas conjugate base is formed after addition of proton to an acid.
  2. B. Conjugate base is a species formed after removal of a proton from an acid whereas conjugate acid is formed after addition of a proton to a base.
  3. C. Conjugate acid has one fewer hydrogen and one more minus charge than the corresponding acid.
  4. D. Conjugate base has one more hydrogen and one fewer minus charge than the corresponding base.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Frequently asked questions

Are these official EUEE past papers?
No. Abrari publishes unofficial practice reconstructed from the study bank for this 2016 E.C. Chemistry paper. It is not an official EAES or Ministry paper and does not use government logos.
Are the answers official?
No. Letters and worked solutions are unofficial Abrari keys. Verified write-ups are labelled Unofficial. Do not treat them as an official marking scheme.
Is Abrari part of MoE, EAES, MoLS, or OCACC?
No. Abrari is an independent study aid. It is not affiliated with, endorsed by, or an official product of those agencies.
Do I need to pay to practice?
No. The questions on this page are free to read and try. There is no payment step.

Try 5 from this paper