Exam Body

Year

Subject

Paper Type

UTME 2018 Chemistry | Objective

Prepare for your exams with UTME questions? Reviewing past/model questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Chemistry (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1 View Details

A given amount of gas occupies \( 10.0 dm ^3 \) at 4 atm , and \( 273^{\circ} \mathrm{C} \). The number of moles of the gas present is \([\text{Molar Volume of gas at s.t.p =} 22.4dm^3 ]\)

Correct A. 0.89 mol

B. 1.90 mol

C. 3.80 mol

D. 5.70 mol

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 2 View Details

According to Charles' law, the volume of a gas becomes zero at

A. \( 0^{\circ} \mathrm{C} \)

B. \(-100^{\circ} \mathrm{C} \)

Correct C. \(-273^{\circ} \mathrm{C} \)

D. \(-373^{\circ} \mathrm{C} \)

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 3 View Details

A substance that is used as a ripening agent for fruits is

Correct A. ethene

B. propane

C. methane

D. butane

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 4 View Details

The Sulphide which is insoluble in dilute hydrochloric acid is

A. FeS

Correct B. CuS

C. ZnS

D. Na,S

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 5 View Details

What is the PH of 0.001 moldm? solution of the sodium hydroxide

A. 14

B. \( 13 \quad \)

C. \( 12 \quad \)

Correct D. 11

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 6 View Details

The type of bonding in \([\mathrm{Cu}(\mathrm{NH}_3)_4]^{2+} \) is

Correct A. coordinate

B. electrovalent

C. metallic

D. covalent.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 7 View Details

Which of the following is an example of a chemical change?

A. dissolution of salt in water

Correct B. rusting of iron

C. melting of ice

D. Separating a mixture by distillation

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 8 View Details

To what temperature must a gas at 273 K be heated in order to double both its volume and pressure?

A. 298 K

B. 546 K

C. 819 K

Correct D. 1092 K

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 9 View Details

According to the Kinetic Theory, an increase in temperature causes the kinetic energy of particles to:

A. decrease

Correct B. increase

C. be zero

D. remain constant

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 10 View Details

An element used in the production of matches is

A. nitrogen

B. aluminium

C. copper

Correct D. sulphur

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 11 View Details

Which of the following gases may not be dried with concentrated sulphuric acid?

A. \( Hcl_(g) \)

Correct B. \( NH_3 \)

C. \( Cl_2 \)

D. \( SO_2 \)

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 12 View Details

Consecutive members of an alkane homologous series differ by

A. CH

Correct B. \( CH_2 \)

C. \( CH_3 \)

D. \( C_nH_n \)

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 13 View Details

A correct electrochemical series can be obtained from K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging

Correct A. Al and Mg

B. Zn and Fe

C. Zn and Pb

D. Pb and H

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 14 View Details

A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that

Correct A. collisions are perfectly elastic

B. forces of repulsion exist

C. forces of repulsion and attraction are in equilibrium

D. collisions are inelastic.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 15 View Details

On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure

A. I, II, III and IV

B. I and II only

C. II only

Correct D. I, III and IV only.

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 16 View Details

Which of the following statements is correct about the periodic table?

A. Elements in the same period have the same number of valence electrons

Correct B. The valence electrons of the elements in the same period increase progressively across the period.

C. Elements in the same group have the same number of electron shells

D. The non-metallic properties of the elements tend to decrease across each period.

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 17 View Details

The periodic classification of the elements is an arrangement of the elements in order of their

A. atomic weights

B. isotopic weights

C. molecular weights

Correct D. atomic numbers

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 18 View Details

If 1 litre of 2.2 M sulphuric acid is poured into a bucket containing 10 litres of water, and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be

A. 2.2 M

B. 1.1 M

Correct C. 0.22 M

D. 0.11 M

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 19 View Details

In the above experiment (Fig. 1) the litmus paper will initially

A. be bleached

B. turn green

C. turn red

Correct D. turn blue

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 20 View Details

The boiling of fat and aqueous caustic soda is referred to as

A. hydrolysis

B. esterification

C. acidification

Correct D. saponification

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 21 View Details

Which of the following pairs of substances will react further with oxygen to form a higher oxide?

A. \( CO_2 \) and \( H_2O \)

B. \( NO \) and \( H_2O \)

C. \( CO \) and \( CO_2 \)

Correct D. \( SO \) and \( NO \)

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 22 View Details

In the preparation of oxygen by heating \( KClO_3 \) in the presence of \( MnO_2 \), only moderate heat is needed because the catalyst acts by

A. lowering the pressure of the reaction

B. increasing the surface area of the reaction

C. increasing the rate of the reaction

Correct D. lowering the energy barrier of the reaction.

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 23 View Details

Methanoic acid mixes with water in all proportions and has about the same boiling point as water. Which of the following methods would you adopt to obtain pure water from a mixture of sand, water and methanoic acid?

A. Fractional distillation

B. Filtration followed by distillation

Correct C. Neutralization with sodium hydroxide followed by distillation

D. Neutralization with sodium hydroxide followed by filtration

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 24 View Details

A quantity of electricity liberates 3.6 g of silver from its salt. What mass of aluminium will be liberated from its salt by the same quantity of electricity?

A. 2.7 g

B. 1.2 g

C. 0.9 g

Correct D. 0.3 g

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 25 View Details

Suitable reagents for the laboratory preparation of nitrogen are

Correct A. sodium dioxonitrate (III) and ammonium chloride

B. sodium trioxonitrate (V) and ammonium chloride

C. sodium chloride and ammonium trioxonitrate (V)

D. sodium chloride and ammonium diozonitrate (II, II)

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Help others prepare! Share this practice hub:

Chat with Support