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Chemistry

Chemistry
A polymeric substance used to make parachute is

Viscose
Terylene
Cotton
Rayon

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Chemistry
Among the following, which is always found in free-state in nature?

Copper
Silver
Gold
Sodium

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Chemistry
Which one of the following is a major green house gas?

Carbon dioxide
Freon
Chloro fluorocarbon
Carbon monoxide

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Chemistry
Silicone is a polymer of

Tetraalkyl silane
Silicon tetrachloride
Silane
Dialkyl dichloro silane

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Chemistry
What is the element required for solar energy conversion ?

Silicon
Tantalum
Ultra pure carbon
Beryllium

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Chemistry
Sea water is saltier than rain water because

Sea beds have salt producing mines
Sea animals are salt producing
The air around the sea is saltish
Rivers wash away salts from earth and pour them into the sea

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