Jamb Chemistry 1984 Past Questions and Answers

Question 31:

• JAMB 1984

Water is said to be 'hard' if it

A. Easily forms ice
B. Has to be warmed before sodium chloride dissolves in it
C. Froms an insoluble scum with soap
D. Contains nitrates
E. Contains sodium ions

Question 32:

• JAMB 1984

Sodium hydroxide (NaOH) pellets are

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

Question 33:

• 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 34:

• 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 35:

• 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