Jamb Chemistry 2015 Past Questions and Answers

Question 21:

• JAMB 2015

In the production of soap, concentrated sodium chloride solution is added to

A. Increase the solubility of soap
B. Decrease the solubility of the soap
C. Saponify the soap
D. Emulsify the soap

Question 22:

• JAMB 2015

A liquid that will dissolve fat is

A. Hydrochloric acid
B. Calcium hydrochloride
C. Kerosene
D. Water

Question 23:

• JAMB 2015

Tartaric acid is used industrially to

A. Make baking powder
B. Make fruit juice
C. Remove rust
D. Dry substance

Question 24:

• JAMB 2015

P1V1 = P2V2 supports ?

A. Charles’s law
B. Boyles’s law
C. Graham’s law
D. Avogadro’s law

Question 25:

• JAMB 2015

A fixed mass of gas a volume of 92cm3 at 3°C. When will be its volume at 18C if the pressure remains constant?

A. 15.3cm³
B. 87.3cm³
C. 2.0cm³
D. 97.0cm³