UTME 2023 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The basicities of \(CH_{3} COOH \) and \( H_{2} SO_{4} \) acids, respectively, are.....
A. 1 and 2
B. 4 and 1
C. 3 and 2
D. 4 and 2
Question 2
The electronic configuration of an element E is \( 1 S^{2} \text{ } 2 S^{2} \text{ } 2 P^{6} \text{ } 3 S^{2} \text{ } 3 P^{6} \text{ } 4 S^{1} \). The element E.....
A. is a halogen
B. is an alkaline earth metal
C. has a stable octet structure
D. is an alkali metal
Question 3
\( I. \) Production of one element and compound \( II. \) Electroplating of one metal by another \( III. \) Purification of some metals Which of the following combinations entirely consists of applications of electrolysis?
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Question 4
Which of the following is NOT a basic assumption of the kinetic theory of gases?
A. Molecules of a gas are in continuous random motion
B. The collisions between the gaseous molecules are perfectly inelastic
C. Gaseous molecules can occupy any available space
D. The cohesive or adhesive forces between the gaseous molecules are negligible
Question 5
The oxidation number of Mn in the radical, \( \mathrm{MnO}_{4}^{-} \), is \( \ldots \ldots \ldots \).
A. +1
B. +3
C. +6
D. +7
Question 6
Elements of the same group in the periodic table have the same ...........
A. number of shells
B. chemical properties
C. atomic number \( D \)
D. number of valence electrons
Question 7
The bond type formed between two elements with electronic configurations \( 1S^{2} \text{ } 2S^{2} \text{ } 2P^{6} \text{ } 3S^{1} \) and \( 1S^{2} \text{ } 2S^{2} \text{ } 2P^{5} \), is _____
A. covalent
B. dative
C. ionic
D. metallic
Question 8
Elements of group I, in the periodic table, are _____
A. diatomic
B. highly electronegative
C. electron acceptors
D. good reducing agents
Question 9
The presence of common salt as an impurity in water will cause the boiling point of water to .....
A. be the same
B. be \( 100^{\circ} \mathrm{C} \)
C. increase
D. reduce
Question 10
What volume of \( 2.5 \mathrm{M} \mathrm{HNO}_{3(\mathrm{aq})} \) will contain exactly 0.05 moles of the acid?
A. \( 5.0 \mathrm{~cm}^{3} \)
B. \( 10.0 \mathrm{~cm}^{3} \)
C. \( 15.0 \mathrm{~cm}^{3} \)
D. \( 20.0 \mathrm{~cm}^{3} \)
Question 11
Calculate the percentage by mass of water of crystallisation in \( \mathrm{CuSO}_{4} .5 \mathrm{H}_{2} \mathrm{O} \).
A. \( 18\% \)
B. \( 20 \% \)
C. \( 36\% \)
D. \( 72\% \)
Question 12
Which of the following statements is not correct? Group 7 elements
A. are diatomic.
B. are good oxidizing agents.
C. are highly electronegative.
D. have relatively low ionisation Potentials.
Question 13
Which of the following gases is the most suitable for performing the fountain experiment?
A. \( \mathrm{N}_{2} \mathrm{O}_{(\mathrm{g})} \)
B. \( \mathrm{HCl}_{(\mathrm{g})} \)
C. \( \mathrm{N}_{2(\mathrm{~g})} \)
D. \( \mathrm{Cl}_{2(\mathrm{~g})} \)
Question 14
Which of the following separation techniques is extensively employed in the garri processing industry?
A. Filtration
B. Crystallisation
C. Sieving
D. Distillation
Question 15
A salt which loses mass when exposed to air is
A. hygroscopic.
B. deliquescent
C. efflorescent
D. fluorescent

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