WAEC Chemistry Past Questions & Answers - Page 148

736.

Which of the following ions is isoelectronic with neon? [3Li, 3F, 10Ne, 17CI,19K]

A.

CI-

B.

F-

C.

K+

D.

Li,+

Correct answer is B

No explanation has been provided for this answer.

737.

The following properties are characteristics of transition elements except

A.

formation of complex ions

B.

fixed oxidation states

C.

formation of coloured compounds

D.

catalytic abilities

Correct answer is B

No explanation has been provided for this answer.

738.

Which of the following elements has the electronic configuration:1s22s22p63s23p1? [11Na, 13A1,
14N,16S]

A.

Al

B.

Na

C.

N

D.

S

Correct answer is A

No explanation has been provided for this answer.

739.

How many orbitals are associated with the p-sub energy level?

A.

2

B.

3

C.

5

D.

6

Correct answer is B

No explanation has been provided for this answer.

740.

Consider the reaction represented by the equation: 23892U + 10139 56Ba + 94 36Kr + 31 0n. The reaction represents a

A.

nuclear fission

B.

nuclear fusion

C.

radioactive decay

D.

spontaneous disintegration

Correct answer is A

No explanation has been provided for this answer.