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Chemistry

Chemistry
Maximum permissible concentration of total hardness in drinking water is

50
100
500
200

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Chemistry
Which one of the following is extensively used for sterilizing water ?

Alum
Borax powder
Bleaching powder
Soda powder

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Chemistry
The major component in the LPG is

Butane
Methane
Propane
Ethane

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Chemistry
Coal is formed from

Crude oil
Coke
Compressed and hardened biomass
Deposit of animal waste

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Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.158
0.201
0.323
0.273

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Chemistry
For a spontaneous chemical process, the free energy change is

Positive
Negative
Zero
Depends on whether the reaction is exothermic or endothermic

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MORE MCQ ON Chemistry

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