General Knowledge - General Science

Exercise :: General Science - Elements and Metals

36. 

Which of the following was to be discovered first in the chromospheres of the sun?

A. Krypton
B. Xenon
C. Neon
D. Helium

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

37. 

Which of the following is in liquid form at room temperature?

A. Lithium
B. Sodium
C. Francium
D. Cerium

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

38. 

Sodium metal is kept under

A. petrol
B. alcohol
C. water
D. kerosene

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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: Option D

Explanation:

No answer description available for this question. Let us discuss.

40. 

From which mineral is radium obtained?

A. Rutile
B. Haematite
C. Limestone
D. Pitchblende

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.