Chemistry - General Knowledge Questions and Answers

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Which of the following acts as promoter for iron in Haber's process?

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One property of ammonia is

It is insoluble in water

It is a odourless gas

It is a yellowish gas

Its aqueous solution turns red litmus blue

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Which one of the following is used for dating very old objects of archaeological importance?

Phosphorus-31

Tritium

Radium

Carbon-14

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In which of the following substances all carbon atoms are quaternary in nature ?

Graphite

Diamond

Teflon

Napthalene

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When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is

Hydrogen

Oxygen

Carbon dioxide

All of them

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Which of the following is used as filler in tyre of rubber ?

Carbon black

Coal

Coke

Graphite

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The open "Sigrees" or coal stoves often require fanning to sustain burning because of

Tendency of carbon dioxide to form a layer along with dust smoke

Lack of oxygen in the surroundings of sigrees

Accumulation of smoke and dust over the sigrees

Interrupted release of moisture from the material

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24 carat of diamond is equal to

200 mg

200 g

95% mg

91% gold

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1 carat of diamond is equal to

200 mg

200 g

100 mg

100 g