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Chemistry

Chemistry
Which of the following is biodegradable ?

Paper
Aluminium
Plastic
D.T.

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Chemistry
Hard water and soft water can be distinguished by using

Dilute acid
Liquid soap
Ordinary soap
Detergent

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Chemistry
The presence of ozone in the stratosphere is responsible for

Increasing the average global temperature in recent years
Supplying oxygen for people travelling in jets
Higher rate of photosynthesis
Checking the penetration of ultra-violet rays to the earth

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Chemistry
Gold dissolves in

Nitric acid
Acetic acid
Hydrochloric acid
Aqua-regia

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Chemistry
In electro-refining, the pure metal is deposited on

Electrolyte
Vessel
Anode
Cathode

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Chemistry
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

All of these
CO2
CO
O3

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MORE MCQ ON Chemistry

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