JAMB Chemistry Past Questions & Answers - Page 154

766.

In the reaction M + N P;∆H = + QKJ. Which of the following would increase the concentration of the product?

A.

Decreaseing the concentration of N

B.

Increasing the concentration of P

C.

Adding a suitable catalyst

D.

Decreasing the temperature

E.

Increasing the temperature

Correct answer is E

No explanation has been provided for this answer.

767.

The colour imparted to a flame by calcuium ion is

A.

green

B.

blue

C.

brick-red

D.

yellow

E.

lilac

Correct answer is C

No explanation has been provided for this answer.

768.

Which of the following relationships between the pressure P, the volume V and the temperature T, represents an ideal gas behaviour?

A.

P \(\alpha\) VT

B.

P \(\alpha\) T/V

C.

PT \(\alpha\) V

D.

PV \(\alpha\) I/T

E.

P \(\alpha\) V/T

Correct answer is B

No explanation has been provided for this answer.

769.

A mixture of common salt, ammonium chloride and barium sulphate can best be separated by

A.

addition of water followed by filtration then sublimation

B.

addition of water followed by sublimation then filtration

C.

sublimation followed by addition of water then filtration

D.

fractional distillation

E.

fractional crystallization

Correct answer is C

No explanation has been provided for this answer.