11.

The nuclear particles which are assumed to hold the nucleons together are
A. electrons B. positrons
C. neutrons D. mesons
Answer and Explanation
Answer:D
Explanation: No answer description available for this question.
12.

The octane number of zero is assigned to
A. 2-methyl octane B. n-heptane
C. iso-octane D. 3-methyl octane
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.
13.

The metal that is used as a catalyst in the hydrogenation of oils is
A. Ni B. Pb
C. Cu D. Pt
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.
14.

The most abundant rare gas in the atmosphere is
A. He B. Ne
C. Ar D. Xe
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
15.

The Latin word formica means ant. The name formic acid is derived from this Latin word because
A. this acid, in ancient times, was used to eliminate ant-hills B. this corrosive acid is secreted by ants to drive away their enemies
C. this acid was first obtained by the distillation of ants D. ants are attracted by the odour of this acid
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.