Post Utme General Paper Past Questions and Answers

Question 866:

Which of the following are direct environmental consequences of the depletion of the ozone layer? Flooding
II. Cataract
III. Global warming
IV. Skin caner
V. Poor resistance to diseases

A. II, III, IV
B. III, IV, V
C. II, IV, V
D. I, II, III

Question 867:

Graphite conducts electricity and has a slippery feel. Which of the following informed these properties?

A. Graphite is a black soft solid
B. Bonding in graphite involves delocalized pi - electrons, and a pair of slidding layers are connected by London forces
C. Carbon atoms in graphite are covalently bonded
D. Each carbon atom in graphite is bonded to three others

Question 868:

Which of the following is not a direct result of the green house effect?

A. Global warming
B. Water pollution
C. Melting of ice caps
D. Increase in land temperature

Question 869:

In the reaction below, which of the following sets a \(-\mathrm{d}\) is the correct sequence for I, II, and III

A. (i) \(\mathrm{SOCl}_2\) (ii) propanol (iii) Mg/dry ether
B. (i) \(\mathrm{Mg} /\) dry ether (ii) propanol (iii) \(\mathrm{PCl}\).
C. (i) propanol (ii) \(\mathrm{Mg} /\) dry ether (ii) \(\mathrm{SOC} / 2\)
D. (i) \(\mathrm{SOCl}_2\) (ii) \(\mathrm{Mg} /\) dry ether(iii) propanol

Question 870:

The cation which forms a white precipitate soluble in excess, in both sodium hydroxide and ammonia solution is ____________

A. \(\mathrm{Pb}^{24}\)
B. \(\mathrm{Zn}^{2+}\)
C. \(\mathrm{Al}^{3+} \)
D. \(\mathrm{Ca}^{2+}\)