Jamb Chemistry 1997 Past Questions and Answers

Question 36:

• JAMB 1997

An undesirable paraffin in the petroleum industry which is particularly prone to knocking is?

A. Iso-octane
B. N-heptane
C. Iso-heptane
D. N-octane

Question 37:

• JAMB 1997

The reaction of an alkanol with an alkanoic acid in the presence of concentrated H₂SO₄ will produce an?

A. Alkanal
B. Alkanoate
C. Alkanone
D. Alkyne

Question 38:

• JAMB 1997

The final product of the reaction of ethyne with hydrogen iodine is?

A. CH₃—CHI₂
B. CH₂l—CH₂I
C. CH₃—CI₃
D. CH₂ = CHI

Question 39:

• JAMB 1997

Synthetic rubber obtained by the polymerization of chlorobutadiene in the presence of sodium is called?

A. Teflon
B. Isoprene
C. Polythene
D. Neoprene

Question 40:

• JAMB 1997

The synthetic detergents are preferred to soap for laundry using hard water because?

A. Detergents are water soluble while soap is not
B. The calcium salts of detergents are water soluble
C. The magnesium salt of soap is soluble in hard water
D. Soap does not have a hydrocarbon terminal chain