Jamb Chemistry Past Questions and Answers

Question 2136:

• JAMB 2020

What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?

A. Steam distillation
B. Destructive distillation
C. Liquefication
D. Hydrolysis

Question 2137:

• JAMB 2020

Liquid black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the ?

A. Acid
B. Ester of alkanoic acid
C. Alkali
D. Alkanol

Question 2138:

• JAMB 2020

When water drops are added to calcium carbide in a container and the gas produced is passed through a jet and lighted, the resultant flame is called an?

A. Oxyethene
B. Oxyhydrocarbon flame
C. Oxyacetylene flame
D. Oxymethane flame

Question 2139:

• JAMB 2020

Which of the following substances is a mixture?

A. Granulated sugar
B. Seawater
C. Sodium chloride
D. Iron filling

Question 2140:

• JAMB 2020

If the quantity of oxygen occupying 2.76L container at a pressure of 0.825 atm and 300k is reduced by one-half, what is the pressure exerted by the remaining gas?

A. 1.650atm
B. 0.825atm
C. 0.413atm
D. 0.275atm