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Chemistry

Chemistry
The gas used for artificial fruit ripening of green fruit is

Ethylene
Methane
Acetylene
Ethane

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Chemistry
In silvery paints, the main constituent present is

Silver powder
White lead
Aluminium powder
Lead powder

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Chemistry
Hard steel contains

0.1 to 0.4 per cent carbon
0.01 to 0.04 per cent carbon
0.5 to 1.5 per cent carbon
2 to 5 per cent carbon

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Chemistry
Most poisonous pollutant in water is

Zinc
Arsenic
Phosphate
Detergent

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Chemistry
Which one of the following was used as a chemical weapon in the first world war ?

Mustard gas
Water gas
Carbon monoxide
Hydrogen cyanide

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Chemistry
The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :

Tollen's
Nylon 66
Terylene
Bakelite

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