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Chemistry

Chemistry
When formaldehyde and potassium hydroxide are heated, we get

Ethyl formate
Methane
Methyl alcohol
Acetylene

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Chemistry
Ultraviolet rays can be used in water treatment as

Disinfectant
Flocculator
Hydrolyser
Precipitator

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Chemistry
Carbon footprint can be reduced by

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

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Chemistry
The constituents of automobile exhaust that can cause cancer is/are :

Oxides of nitrogen
Polycyclic hydrocarbons
Lead
Carbon monoxide

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Chemistry
The charcoal used to decolourise brown sugar solution is

Wood charcoal
Animal charcoal
Sugar charcoal
Coconut charcoal

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Chemistry
‘Aerosol’ is known as

Pollutant gas, present in air
Microbes, present in air
Green house gas present in air
Suspended solid particles in air

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MORE MCQ ON Chemistry

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