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Chemistry

Chemistry
Which one of the following is a greenhouse gas ?

Carbon dioxide
Sulphur dioxide
Helium
Nitrogen

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Chemistry
The chemical name of quartz is

Sodium silicate
Sodium phosphate
Calcium phosphate
Calcium oxide

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Chemistry
The reaction intermediate formed during the preparation of diethylether from ethanol by treatment with H2SO4 is

Carbanion
Carbene
Carbocation
Free radical

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Chemistry
Which of the following is colourless ?

Phosphorus
Oxygen
Sulphur
Chlorine

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Chemistry
Zone refining is used for the purification of

Ag
Cu
Ge
Au

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Chemistry
When formaldehyde and potassium hydroxide are heated, we get

Methane
Acetylene
Ethyl formate
Methyl alcohol

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