Chemistry MCQ

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Chemistry MCQ

Question 11 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Ozone layer of atmosphere absorbs:
A
Ultraviolet rays
B
Infra-red rays
C
All radiations of Light
D
Cosmic rays.
Question 12 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The maximum number of covalent formed by nitrogen is
A
1
B
2
C
3
D
4
Question 13 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The nucleus of a hydrogen atom consists of
A
1 proton only
B
1 proton + 2 neutron
C
1 neutron only
D
1 electron only
Question 14 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The metallurgical process in which a metal is obtained in a fused state is called
A
smelting
B
roasting
C
calcinations
D
froth floatation
Question 15 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The number of g-molecule of oxygen in 6.02 x 10$^{24}$CO molecules is
A
1 gram of molecule
B
0.5 gram of molecule
C
5 gram of molecule
D
10 gram of molecule
There are 15 questions to complete.