UTME 2022 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Which of the following water samples will have the highest titre value when titrated for the \( \mathrm{Ca}^{2+} \) ions using soap solution?
A. Permanently hard water after boiling
B. Temporarily hard water after boiling
C. Rain water stored in a glass jar for two years
D. Permanently hard water passed through permutit.
Question 2
Compound W is
A. a soap
B. an oil
C. an alkane
D. an ester
E. sucrose
Question 3
If an excess of a liquid hydrocarbon is poured into a jar of chlorine, and the sealed jar is then exposed for several hours to bright sunlight, all the chlorine gas is consumed. The hydrocarbon is said to have undergone.
A. a polymerization reaction
B. an isomerization reaction
C. an addition reaction
D. a substitution reaction
Question 4
Which of the following methods may be used to prepare tritoxonitrate (V) acid (nitric acid) in the laboratory?
A. Heating ammonia gas with tetraoxosulphate (VI) acid
B. Heating ammonium trioxonitrate (V) with tetraoxo-sulphate (VI) acid
C. Heating sodium trioxonitrate (V) with calcium tetraoxosulphate (VI) acid
D. Heating potassium trioxonitrate(V) with calcium hydroxide
Question 5
For the reaction \( 2\text{Fe}^{3+} + 2\text{I}^- \rightarrow 2\text{Fe}^{2+} + \text{I}_2 \) which of the following statements is TRUE?
A. Fe is oxidized to \( \mathrm{Fe}^{3+} \)
B. \( \mathrm{Fe}^{3+} \) is oxidized to \( \mathrm{Fe}^{2+} \)
C. \( \text{I}^- \) is oxidized to \( \text{I}_2 \)
D. \( \text{I}^- \) is reduced to \( \text{I}_2 \)
Question 6
Hydrogen is not liberated when trioxonitrate (V) acid reacts with zinc because
A. zinc is rendered passive by the acid
B. hydrogen produced is oxidized to water
C. oxides of nitrogen are produced
D. all nitrates are soluble in water
Question 7
Reaction of \( X \) with yeast forms the basis of the
A. plaster industry
B. textile industry
C. brewing industry
D. soap industry
Question 8
The solubility of \( \mathrm{Na}_{3} \mathrm{AsO}_{4} \left(\mathrm{H}_{2} \mathrm{O}\right)_{12} \) is 38.9 g per \( 100 \mathrm{~g} \mathrm{H}_{2} \mathrm{O} \). What is the mass percentage of \( \mathrm{Na}_{3} \mathrm{AsO}_{4} \) in the ethanol? \( \quad [\mathrm{As}=75, \mathrm{Na}=23, \mathrm{O}=16, \mathrm{H}=1] \)
A. 87.2%
B. 38.9%
C. 19.1%
D. 13.7 %
Question 9
Oil spillage in ponds and creeks can be cleaned up by
A. burning off the oil layer
B. spraying with detergent
C. dispersal with compressed air
D. spraying with hot water.
Question 10
If an element has the electronic configuration \( I s^{2} s^{2} p^{6} \mathrm{Ss}^{2} \mathrm{Sp}^{4} \), it is
A. a metal
B. an alkaline-earth metal
C. an s-block element
D. a p-block element
E. a transition element
Question 11
In which of the following reaction does hydrogen peroxide act as a reducing agent?
A. \( \text{H}_2\text{S} + \text{H}_2\text{O}_2 \rightarrow \text{S} + 2\text{H}_2\text{O} \\ \)
B. \( \text{PbSO}_3 + \text{H}_2\text{O}_2 \rightarrow \text{PbSO}_4 + \text{H}_2\text{O} \\ \)
C. \( 2\text{I}^- + 2\text{H}^+ + \text{H}_2\text{O}_2 \rightarrow \text{I}_2 + 2\text{H}_2\text{O} \\\)
D. \( \text{PbO}_2 + 2\text{HNO}_3 + \text{H}_2\text{O}_2 \rightarrow \text{Pb}(\text{NO}_3)_2 + 2\text{H}_2\text{O} + \text{O}_2 \\ \)
Question 12
A mixture of common salt, ammonium chloride and barium sulphate can best be separated by
A. addition of water followed by filtration then sublimation
B. addition of water followed by sublimation then filtration
C. sublimation followed by addition of water then filtration
D. fractional distillation
E. fractional crystallation
Question 13
What is the formula of sodium gallate if gallium ( \( \mathrm{Ga} \) ) shows an oxidation number of +3?
A. \( \mathrm{NaGaO}_{3} \)
B. \( \mathrm{Na_2Ga}(OH)_{2} \)
C. \( \mathrm{NaGa}(O_3)_{2} \)
D. \( \mathrm{NaGa}(OH)_{4} \)
Question 14
The three dimensional shape of methane is
A. hexagonal
B. trigonal
C. linear
D. tetrahedral
E. cubical
Question 15
The flame used by welders in cutting metals is
A. butane gas flame
B. acetylene flame
C. kerosine flame
D. oxy-acetylene flame
E. oxygen flame

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