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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 21:

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

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

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Question 22:

A liquid that will dissolve fat is

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A Hydrochloric acid
B Calcium hydrochloride
C Kerosene
D Water

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Question 23:

Tartaric acid is used industrially to

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

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Question 24:

P1V1 = P2V2 supports ?

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A Charlesâ€™s law
B Boyles’s law
C Grahamâ€™s law
D Avogadroâ€™s law

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Question 25:

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

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

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