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Chemistry

Chemistry
Two moles of an ideal gas expand freely into vacuum. The work done by the gas is

2J
4J
Infinity

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Chemistry
Which of the following has least negative electron gain enthalpy

P
F
Cl
S

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Chemistry
Laughing gas is

Nitrous oxide
Nitrogen trioxide
Nitric oxide
Nitrogen pentoxide

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Chemistry
Fertiliser having high nitrogen content is :

Ammonium sulphate
Calcium citrate
Urea
Ammonium nitrate

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Chemistry
Williamson's synthesis is widely used in the laboratory preparation of

Alcohols
Ethers
Esters
Aldehydes

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Chemistry
Hard water and soft water can be distinguished by using

Detergent
Dilute acid
Liquid soap
Ordinary soap

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