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Chemistry

Chemistry
Which variety of coal contains recognisable traces of the original plant material ?

Anthracite
Bitumen
Peat
Lignite

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Chemistry
The number of waves in n x 10th Bohr's orbit are

n2
n3
n
n-2

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

Cathode
Electrolyte
Anode
Vessel

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Chemistry
When a spoon is to be electroplated with nickel the spoon is

Dipped in a nickel sulphate solution
Made cathode and a pure nickel red, the anode
Made anode and a pure nickel rod, the cathode
Coated with nickel sulphate and dried

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Chemistry
Sulphur dioxide level in the atmosphere can be reduced by using

More efficient car engines
Low - sulphur fuels
Catalytic converters in industry
Static electricity to attract it in factory chimneys

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Chemistry
Diamonds are glittering and attractive because light incident on them undergoes

Multiple internal reflections
Multiple surface reflections
Highest refraction
Hundred percent transmission

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