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Chemistry

Chemistry
Total number of naturally occurring elements

110
62
98
92

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Chemistry
The amount of chlorine available in water after disinfection is called as

Free chlorine
Combined available chlorine
Free available chlorine
Residual chlorine

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Chemistry
The greenhouse effect is caused by the higher level of which gas in the atmosphere ?

Nitrous oxide
Sulphur dioxide
Carbon dioxide
Carbon monoxide

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Chemistry
Carbon footprint can be reduced by

Commuting by public transport
All of these
Recycling waste materials
Using energy efficient appliances

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Chemistry
An acid having basicity one is

Phosphoric acid
Disodium hydrogen phosphate
Sodium phosphate
Sodium dihydrogen phosphate

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Chemistry
Which one of the following gases has the highest calorific value?

Coal gas
Natural gas
Water gas
Indane gas

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MORE MCQ ON Chemistry

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