UTME 2021 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Oxygen demanding wastes are considered to be a water pollutant because they
A. deplete oxygen which is necessary for the survival of aquatic organisms
B. increase oxygen which is necessary for the survival of aquatic organisms
C. increase other gaseous substances which are necessary for the survival of aquatic organism
D. deplete other gaseous species which are necessary for the survival of aquatic organisms
Question 2
\( \begin{aligned} &\text{Given the reactions:} \\ &\text{(i) Fe}_{(s)} + \text{X(NO}_3\text{)}_{2(aq)} \rightarrow \text{Fe(NO}_3\text{)}_{2(aq)} + \text{X}_{(s)} \\ &\text{(ii) H}_{2(g)} + \text{XO}_{(s)} \rightarrow \text{X}_{(s)} + \text{H}_2\text{O}_{(g)} \\ &\text{X is likely to be} \end{aligned} \)
A. copper
B. zinc
C. calcium
D. lead
Question 3
Which of the following compounds will give a precipitate with an aqueous ammoniacal solution of copper(I) chloride?
A. \( \mathrm{CH}_3\mathrm{CH} = \mathrm{CHCH} \)
B. \( \mathrm{CH}_{3}\mathrm{C} = \mathrm{CCH} \)
C. \( \mathrm{HC} = \mathrm{C} - \mathrm{CH}_3 \)
D. \( \mathrm{CH}_2 = \mathrm{CH} - \mathrm{CH} = \mathrm{CH}_2 \)
Question 4
In the course of an experiment, two gases \( X \) and \( Y \) were produced. X turned wet lead ethanoate to black and Y bleached moist litmus paper. What are the element(s) in each of the gases \( X \) and \( Y \) respectively?
A. \( \mathrm{H} \) and \( \mathrm{S} \); \( \mathrm{Cl} \)
B. \( \mathrm{H} \) and \( \mathrm{O} \); \( \mathrm{Cl} \)
C. \( \mathrm{H} \) and \( \mathrm{S} \); \( \mathrm{C} \) and \( \mathrm{O} \)
D. \( \mathrm{H} \) and \( \mathrm{Cl} \); \( \mathrm{S} \) and \( \mathrm{O} \)
Question 5
Which of the following substances has the lowest vapour density?
A. Ethanoic acid
B. Propanol
C. Dichloromethane
D. Ethanal
Question 6
The exhaust fumes from a garage in a place that uses petrol of high sulphur content are bound to contain
A. \( CO \text{ and } SO \)
B. \( CO \text{ and } SO_2 \)
C. \( CO, SO \text{ and } SO_3 \)
D. \( CO \text{ and } H_2 \)
Question 7
Which of the following contains an efflorescent, a deliquescent and a hygroscopic substance respectively?
A. \( \mathrm{Na}_{2}SO_{3}, \text{Concentrated} \text{ } \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{CaCl}_{2} \)
B. \( \mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{H}_{2} \mathrm{O}, \mathrm{FeSO}_{4}, 7 \mathrm{H}_{2} \mathrm{O}, \text{Concentrated} \text{ } \mathrm{H}_{2}, \mathrm{SO}_{4}, \)
C. \( \mathrm{C} . \mathrm{Na}_{2}\mathrm{CO}_{3}, \mathrm{IOH}_{2} \mathrm{O}, \mathrm{FeCl}_{2}, \text{Concentrated} \text{ } \mathrm{H}_{2}, \mathrm{SO}_{4} \)
D. \( \text{Concentrated} \text{ } \mathrm{H}_{2}, \mathrm{SO}_{4}, \mathrm{FeSO}, 7 \mathrm{H}_{2} \mathrm{O}, \mathrm{MgCl}_{2} \)
Question 8
Local black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the
A. acid
B. ester of alkanoic acid
C. alkali
D. alkanol
Question 9
Aluminium is extracted commercially from its ore by
A. heating aluminium oxide with coke in a furnace
B. the electrolysis of fused aluminium oxide in cryolite.
C. treating cryolite with sodium hydroxide solution under pressure
D. heating sodium aluminium silicate to a high temperature.
Question 10
The most volatile fraction obtained from fractional distillation of crude petroleum contains
A. butane, propane and kerosene
B. butane, propane and petrol
C. ethane, methane and benzene
D. methane, ethane and propane
Question 11
When steam is passed through red hot carbon, which of the following are produced?
A. Hydrogen, oxygen and carbon(IV) oxide
B. Hydrogen and carbon(IV) oxide
C. Hydrogen and carbon(II) oxide
D. Hydrogen and trioxocarbonate(IV) acid
Question 12
An increase in temperature causes an increase in the pressure of a gas because there is an increase in the
A. average velocity of the molecules
B. nuclei of collisions between the molecules
C. density of the molecules
D. free mean path between each molecule and the other
Question 13
Chlorine is produced commercially by
A. electrolysis of dilute hydrochloric acid
B. electrolysis of brine
C. neutralization of hydrogen chloride
D. heating potassium trioxochlorate(V)
Question 14
The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354 K resulting in the crystals melting. The forces are known as
A. coulombic
B. ionic
C. covalent
D. van der Waals
Question 15
Which of the following is used in the manufacture of glass?
A. Sodium chloride
B. Sodium trioxocarbonate(IV)
C. Sodium tetraoxosulphate(VI)
D. Sodium trioxonitrate(V)

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: