General Chemistry – 1 – 4

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

(a) Krypton
(b) Xenon
(c) Neon
(d) Helium

Answer
Answer : (d)

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

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

(a) Lithium
(b) Sodium
(c) Francium
(d) Cerium

Answer
Answer : (c)

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

18. Sodium metal is kept under :

(a) petrol
(b) alcohol
(c) water
(d) kerosene

Answer
Answer : (d)

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

19. Diamond is an allotropic form of :

(a) germanium
(b) carbon
(c) silicon
(d) sulphur

Answer
Answer : (b)

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

20. In fireworks, the green flame is produced because of :

(a) sodium
(b) barium
(c) mercury
(d) potassium

Answer
Answer : (b)

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


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