51.

The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
A. 4 B. 5
C. 2 D. zero
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.
52.

The National Chemical Laboratory is situated in
A. New Delhi B. Bangalore
C. Pune D. Patna
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
53.

Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
A. 2 : 16 : 2 B. 2 : 16 : 1
C. 1 : 16 : 2 D. 1 : 1 : 1
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
54.

The mass number of an atom is equal to
A. the number of protons B. the number of protons and electrons
C. the number of nucleons D. the number of neutrons
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
55.

The maximum number of covalent formed by nitrogen is
A. 1 B. 2
C. 3 D. 4
Answer and Explanation
Answer:D
Explanation: No answer description available for this question.