Jamb Chemistry Past Questions and Answers

Question 386:

• JAMB 1984

Sodium hydroxide (NaOH) pellets are

A. Deliquescent
B. Hygroscopic
C. Efflorescent
D. Hydrated
E. Fluorescent

Question 387:

• JAMB 1984

Alkanes

A. Are all gases
B. Have the general formula C_nH_2n + ₂O
C. Contain only carbon and hydrogen
D. Are usually soluble in water
E. Are usually active compounds

Question 388:

• JAMB 1984

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 bring 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
E. A reduction reaction

Question 389:

• JAMB 1984

The function of conc. H₂SO₄ in the esterification of ethanoic acid with ethanol is to

A. Serve as a dehydrating agent
B. Serve as a solvent
C. Act as a catalyst
D. Prevent any side reaction
E. Serve as an oxidizing agent

Question 390:

• JAMB 1984

A piece of sea shell, when dropped into a dilute solution of hydrochloric acid, produces a colourless, odourless gas which turns clear limewater milky. The sea shell contains

A. Sodium chloride
B. Ammonium nitrate
C. Calcium carbonate
D. Calcium chloride
E. Magnesium chloride