WAEC Chemistry Past Questions & Answers - Page 127

631.

The initial volume of a gas at 300 K was 220 cm 3 Determine its temperature if the volume became 250 cm 3

A.

183 K

B.

264 K

C.

300 K

D.

341 K

Correct answer is D

No explanation has been provided for this answer.

632.

The equation P = \(\frac{K}{V}\) illustrates

A.

Boyle's law

B.

Charles' law

C.

Dalton's law

D.

Gay Lussac's law

Correct answer is A

No explanation has been provided for this answer.

633.

Bubbling excess carbon (IV) oxide into calcium hydroxide solution results in the formaton of

A.

CaO

B.

Ca(HCO3)2

C.

H2CO3

D.

CaCO3

Correct answer is B

No explanation has been provided for this answer.

634.

A gas that is collected by upward delivery is likely to be

A.

heavier than air

B.

insoluble in water

C.

lighter than air

D.

soluble in water

Correct answer is C

No explanation has been provided for this answer.

635.

Which of the following statements about a molar solution is correct? it

A.

is a supersaturated solution

B.

cannot dissolve more of the solute at that temperature

C.

contains any amount of solute in a given volume of solution

D.

contains one mole of the solute in 1 dm3 of solution

Correct answer is D

No explanation has been provided for this answer.