JAMB Chemistry Past Questions & Answers - Page 126

626.

The diagram above represents the formation of

A.

a metallic bond

B.

an electrovalent bond

C.

a covalent bond

D.

a coordinate covalent bond

Correct answer is C

Covalent bonds involve the sharing of electrons between two atoms

627.

Use the graph above to answer this question.How long does it take all the solid to melt?

A.

2.5 mins

B.

6.0 mins

C.

1.0 min

D.

3.0 mins

Correct answer is A

No explanation has been provided for this answer.

628.

Use the graph above to answer this question.If the gas is cooled, at what temperature will it start to condense?

A.

125 oC

B.

150oC

C.

175oC

D.

250oC

Correct answer is B

No explanation has been provided for this answer.

629.

The compound above is an

A.

ether

B.

ester

C.

alkanal

D.

alkanol

Correct answer is B

No explanation has been provided for this answer.

630.

Use the option above to answer this question. The graph that describes a zero order reaction is

A.

A

B.

B

C.

C

D.

D

Correct answer is B

No explanation has been provided for this answer.