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Chemistry

Chemistry
At room temperature, the metal that remains liquid is:

Lead
Mercury
Platinum
Zinc

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Chemistry
Sea water can be purified by the process of

Evaporation
Fractional distillation
Distillation
Filtration

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Chemistry
Which gas is most stable at room temperature

F2
H2
N2
O2

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Chemistry
The presence of ozone in the stratosphere is responsible for

Increasing the average global temperature in recent years
Checking the penetration of ultra-violet rays to the earth
Higher rate of photosynthesis
Supplying oxygen for people travelling in jets

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Chemistry
Basicity of boric acid, H3BO3 is

5
3
2
4

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Chemistry
The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are

Silver Iodide
All listed here
Dry ice or frozen carbon dioxide
Sodium Chloride

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MORE MCQ ON Chemistry

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