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Chemistry

Chemistry
The number of hydrogen bonds between guanine and cytosine in DNA is

2
4
3
1

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Chemistry
In arc welding, Argon is used because of its

Ability to lower the melting point of the metal
High flammability
High calorific value
Low reactivity with metal

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Chemistry
In upper layer of atmosphere ozone is formed by

The action of ultraviolet rays on oxygen
Subjecting oxygen to high pressure
The action of nitrogen on oxygen in atmosphere
The combination of oxygen molecules

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Chemistry
Aspirin is common name of

Salicylic Acid
Salicylate
Acetyl Salicylic Acid
Methyl Salicylate

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Chemistry
A subshell with l=2 can take up

8 electron
3 electron
5 electron
10 electron

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Chemistry
The natural resource, known as black gold is

Platinum
Lead
Coal
Tin

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MORE MCQ ON Chemistry

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