Post Utme Chemistry Past Questions and Answers

Question 1031:

Which of the following is the correct order of increase in repulsion of electron pair groups?

A. Lone pair to lone pair lone pair to bond pair bond pair to bond pair
B. Bond pair to bond pair, lone pair to lone pair, lone pair to bond pair
C. Bond pair to bond pair, lone pair to bond pair, lone pair to lone pair
D. Lone pair to bond pair, lone pair to lone pair, bond pair to bond pair

Question 1032:

Which of the following is observed on exposure of chlorine water to sunlight?
i. Colurless and odourless gas is evolved
ii. The resulting solution is neutral
iii. The gas evolved is oxygen iv. The resulting solution is acidic
v. The gas evolved is chlorine vi. the gas evolved has no effect on litmus

A. Ii, iii & vi
B. I, ii & v
C. I, iii, iv & vi
D. Ii and v only

Question 1033:

Which of the following compounds can exist in an enantiomeric form?

A. 2-methylbutan-1-ol
B. Butan-1-ol
C. 3-methylpentane
D. Methane

Question 1034:

In the laboratory preparation of hydrogen pure zinc is not used because ____________

A. Pure zinc becomes passive due to the formation of oxide layer
B. Pure zinc becomes passive due to the formation of sulphate layer
C. Pure zinc reacts slowly with the acid
D. Pure zinc reacts with acid vigorously and violently

Question 1035:

Chlorine prepared through the action of concentrated hydrochloric acid on potassium tetraoxomanganate (VII) is passed through water and concentrated \(H _{2} SO _{4}\) to respectively ____________

A. Remove \(HCl\) impurities and dry the gas
B. Dry the gas and remove \(HCl\) impurities
C. Remove hydrogen gas and dry the gas
D. Remove carbon impurities and make the chlorine gas reactive