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Chemistry

Chemistry
The inherited traits of an organism are controlled by

enzymes
DNA molecules
nucleotides
RNA molecules

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Chemistry
Which of the following is used as a lubricant in heavy machines?

Phosphorus
Graphite
Sulphur
Bauxite

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Chemistry
The most common cause of pollution of air is

Sulphur dioxide
Carbon dioxide
Carbon monoxide
Smoke

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Chemistry
When a bond is formed between two atoms, the energy of the system will

Decrease
Increase
May increase or decrease
Remain the same

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Chemistry
The metal ion present in Vitamin B12 is

Zinc
Cobalt
Iron
Nickel

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Chemistry
Cooking gas is a mixture of

Carbon monoxide and carbon dioxide
Butane and propane
Carbon dioxide and oxygen
Methane and ethylene

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MORE MCQ ON Chemistry

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