UTME 2018 Chemistry | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 \([\text{Molar Volume of gas at s.t.p =} 22.4dm^3 ]\)
A. 0.89 mol
B. 1.90 mol
C. 3.80 mol
D. 5.70 mol
Question 2
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
C. 0.22 M
D. 0.11 M
Question 3
The IUPAC name for \( \begin{array}{rc} \text{CH}_3 & \\ \diagdown \\ & \text{CH} - \text{CH}_2 \\ \diagup \\ \text{CH}_3 & \end{array} \) is
A. I-methyl pentane
B. 3-methylbutane
C. 2-methylbutane
D. I-dimethyl propane
Question 4
The number of electrons in the valence shell of an element of atomic number 14 is
A. 1
B. 2
C. 3
D. 4
Question 5
Which of the following gases may not be dried with concentrated sulphuric acid?
A. \( Hcl_(g) \)
B. \( NH_3 \)
C. \( Cl_2 \)
D. \( SO_2 \)
Question 6
What is the PH of 0.001 moldm? solution of the sodium hydroxide
A. 14
B. \( 13 \quad \)
C. \( 12 \quad \)
D. 11
Question 7
The type of bonding in \([\mathrm{Cu}(\mathrm{NH}_3)_4]^{2+} \) is
A. coordinate
B. electrovalent
C. metallic
D. covalent.
Question 8
Consecutive members of an alkane homologous series differ by
A. CH
B. \( CH_2 \)
C. \( CH_3 \)
D. \( C_nH_n \)
Question 9
A correct electrochemical series can be obtained from K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging
A. Al and Mg
B. Zn and Fe
C. Zn and Pb
D. Pb and H
Question 10
An aqueous solution of a metal salt, M, gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia. Therefore the cation in M is
A. \( Zn^{2+} \)
B. \( Ca^{2+} \)
C. \( Al^{2+} \)
D. \( Pb^{2+} \)
Question 11
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
D. 0.3 g
Question 12
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 \( CO_2 \)
D. \( SO \) and \( NO \)
Question 13
An element used in the production of matches is
A. nitrogen
B. aluminium
C. copper
D. sulphur
Question 14
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
D. lowering the energy barrier of the reaction.
Question 15
How many atoms are present in 6.0 g of magnesium? \( [Mg=24,Na=6.02\times10^{23} mol^{-1}] \)
A. 1.20 x 10²²
B. 2.41 x 10²²
C. 1.51 x 10²³
D. 3.02 x 10²³

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