NECO Chemistry Past Questions & Answers - Page 8

36.

The reaction of an alkanol with alkanioc acid is known as

A.

dehydration

B.

esterification

C.

halogenation

D.

hydrogenation

E.

saponification

Correct answer is B

No explanation has been provided for this answer.

37.

The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is

A.

CH2

B.

CH3

C.

C2H2

D.

C2H4

E.

C2H6

Correct answer is B

No explanation has been provided for this answer.

38.

Which of the following statements is NOT correct of group VII elements? They

A.

are diatomic

B.

are good oxidizing agents

C.

are highly electronegative

D.

have high electron affinity

E.

have relatively low ionization potentials

Correct answer is E

No explanation has been provided for this answer.

39.

Which of the following is NOT a fraction of petroleum?

A.

Bitumen

B.

Coal

C.

Diesel

D.

Kerosene

E.

Petrol

Correct answer is B

No explanation has been provided for this answer.

40.

The scientist who discovered the zig-zag movement of gas molecules is

A.

Brownian

B.

Dalton

C.

Gay Lussac

D.

Graham

E.

Newton

Correct answer is A

No explanation has been provided for this answer.