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Chemistry

Chemistry
Which of the following fibres catches fire least ?

Rayon
Terricot
Nylon
Cotton

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

n3
n2
n-2
n

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Chemistry
When Hydrogen starts burning in air, it produces ?

Methane
Water
Carbonic Acid
Ammonia

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Chemistry
The element used in the manufacture of safety matches is

Silicon
Sulphur
Magnesium
Phosphorous

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Chemistry
Mercury is a :

Liquid non-metal
Liquid metal
Solid metal
Solid non-metal

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Chemistry
An emulsion is a colloid of a

Gas in a liquid
Gas in a solid
Liquid in a liquid
Liquid in a gas

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