UTME 2017 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The number of isomers of \( \mathrm{C}_{5} \mathrm{H}_{12} \) is
A. four
B. three
C. two
D. one
Question 2
In the diagram above, concentrated tetraoxsulphate(VI) acid is used to
A. dry the gas
B. remove impurities
C. remove acid fumes
D. prevent the sucking back of the gas
Question 3
Organic compounds generally in comparison with inorganic compounds have
A. higher melting and boiling points
B. higher melting points and lower boiling points
C. lower melting and boiling points
D. lower melting points and higher boiling points
Question 4
If the vapour density of an organic compound is 78, calculate its molecular formula
A. \( \mathrm{C}_{6} \mathrm{H}_{6} \)
B. \( \mathrm{C}_{11} \mathrm{H}_{\infty} \)
C. \( \mathrm{C}_{10} \mathrm{H}_{10} \)
D. \( \mathrm{C}_{11} \mathrm{H}_{24} \)
Question 5
A metal that will react with steam to liberate hydrogen gas is
A. zinc
B. aluminium
C. sodium
D. iron
Question 6
If the molecular mass of tetraoxosulphate(VI) acid is 98, calculate its vapour density
A. 196
B. 49
C. 106
D. 82
Question 7
In an exothermic reaction, change in entropy is usually
A. indeterminate
B. positive
C. negative
D. zero
Question 8
An ore of tin is
A. haematite
B. magnetite
C. bauxite
D. cassiterite
Question 9
A diminishing ozone layer with an increase in ultra-violet radiations is as a result of presence of
A. chlorofluorocarbons
B. hydrocarbon
C. oxides of sulphur
D. oxides of carbon
Question 10
The alkanoic acid found in human sweat is
A. \( \mathrm{CH}_{3}-\mathrm{COOH} \)
B. \( \mathrm{CH}_{3}-\left(\mathrm{CH}_{2}\right)_{2}-\mathrm{COOH} \)
C. \( H-COOH \)
D. \( CH, \left(\mathrm{CH}_{2}\right) - COOH \)
Question 11
The bonding between water molecule and hydrogen ion is
A. dative
B. metallic
C. hydrogen
D. covalent
Question 12
When an unknown salt was warmed with copper turnings and a few drops of concentrated tetraoxosulphate(VI) acid, a reddish-brown gas was evolved. The salt is a:
A. Br -
B. \( \mathrm{NO}_{3}^{-} \)
C. \( \mathrm{SO}_{2}^{2-} \)
D. \( \mathrm{CO}_{2} \)
Question 13
The derivative of benzene that can be used in making explosives is
A. aniline
B. xylene
C. phenol
D. toluene
Question 14
How many types of ions can be obtained when a double salt ionizes in water?
A. 4
B. 3
C. 1
D. 2
Question 15
Which of the following separation techniques can be employed in obtaining solvent from its solution?
A. Evaporation
B. Distillation
C. Filtration
D. Precipitation

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