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Chemistry

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

Sodium
Gold
Copper
Silver

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Chemistry
Of the following, which one pollutes the air of a big city ?

Chromium
Cadmium
Lead
Copper

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Chemistry
Synthetic detergents are prepared from

Sodium salts of higher fattyacids
Potassium salts of higher fatty-acids
Glycerides
Hydrocarbons of petroleum

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Chemistry
Milk is

Foam
Gel
Suspension
Emulsion

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Chemistry
Name two elements that find wide application in transistor industry

Carbon and Platinum
Silicon and Germanium
Tungsten and Platinum
Iridium and Germanium

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Chemistry
Pyrethrin used in mosquito coil is obtained from

A bacterium
A fungus
A seed plant
An insect

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