Chemistry questions and answers

Chemistry Questions and Answers

Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.

1,386.

Which of the following statements about enthalpy of neutralization is correct? It

A.

is constant for a strong acid and a strong base

B.

cannot be determined using calorimeter

C.

has a positive value

D.

is higher for strong acid and a weak base

Correct answer is A

No explanation has been provided for this answer.

1,387.

The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration is?

A.

colourless

B.

orange

C.

pink

D.

yellow

Correct answer is C

Phenolphthalein is one of the most commonly-used indicators in neutralisation titration.

Phenolphthalein is naturally colorless but turns pink in alkaline solutions.

1,388.

Which of the following equimolar solutions has the highest conductivity?

A.

CH3COOH(aq)

B.

H2CO3(aq)

C.

H 2SO 4(aq)

D.

NaOH (aq)

Correct answer is C

No explanation has been provided for this answer.

1,389.

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.

1,390.

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.