1.
Which of the following was to be discovered first in the chromospheres of the sun?
A. Krypton
B. Xenon
C. Neon
D. Helium
2. Which of the following is in liquid form at room temperature?
A. Lithium
B. Sodium
C. Francium
D. Cerium
3. Sodium metal is kept under
A. petrol
B. alcohol
C. water
D. kerosene
4. Which of the following are the ingredients of gun metal?
A. Iron, Zinc, Titanium
B. Iron, tin
C. Iron, Brass, Tin
D. Copper, Tin
5. From which mineral is radium obtained?
A. Rutile
B. Haematite
C. Limestone
D. Pitchblende
ANSWERS:
1. Answer: Option D
2. Answer: Option C
3. Answer: Option D
4. Answer: Option D
5. Answer: Option D
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