JAMB Chemistry Past Questions & Answers - Page 114

566.

choose the correct answer in the option above. Which of the following is a primary amine?

A.

A

B.

B

C.

C

D.

D

Correct answer is B

No explanation has been provided for this answer.

567.

In the diagram above , X is the

A.

enthalpy

B.

enthalpy change

C.

activation energy

D.

activated complex

Correct answer is B

No explanation has been provided for this answer.

568.

In the diagram above, the gas produced is?

A.

NO

B.

NO2

C.

N2O

D.

N2O4

Correct answer is B

In this laboratory preparation, 50% trioxonitrate (V) acid is reacted with copper turnings to liberate nitrogen (II) oxide ( NO ) that is collected by downward delivery.

Cu+\(4HNO_3 →Cu(NO_3)_2+2NO_2+2H_2O\)

569.

In the diagram above, the purpose of the asbestos to?

A.

absorb impurities

B.

catalyze the reaction

C.

solidify the gas

D.

dry the gas

Correct answer is B

Catalyst like platinize asbestos or vanadium(v)oxide is required to speed up the combination to form sulphur(iv)oxide.

570.

Choose the correct option from the structure above

A.

A

B.

B

C.

C

D.

D

Correct answer is C

No explanation has been provided for this answer.