36.

Which of the following is in liquid form at room temperature?
A. Lithium B. Sodium
C. Francium D. Cerium
Answer and Explanation
Answer:C
Explanation: No answer description available for this question.
37.

From which mineral is radium obtained?
A. Rutile B. Haematite
C. Limestone D. Pitchblende
Answer and Explanation
Answer:D
Explanation: No answer description available for this question.
38.

Sodium metal is kept under
A. petrol B. alcohol
C. water D. kerosene
Answer and Explanation
Answer:D
Explanation: No answer description available for this question.
39.

Which of the following are the ingredients of gun metal?
A. Iron, Zinc, Titanium B. Iron, tin
C. Iron, Brass, Tin D. Copper, Tin
Answer and Explanation
Answer:D
Explanation: No answer description available for this question.
40.

What is laughing gas?
A. Nitrous Oxide B. Carbon monoxide
C. Sulphur dioxide D. Hydrogen peroxide
Answer and Explanation
Answer:A
Explanation: No answer description available for this question.