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Chemistry

Chemistry
1 carat of diamond is equal to

100 g
200 mg
100 mg
200 g

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Chemistry
Heating of a ore below its melting point in the absence of air is known as

Refining
Roasting
Calcination
Smelting

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Chemistry
Which gas is used for converting vegetable oils into saturated fats ?

Cl2
SO2
O2
H2

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Chemistry
Which is the purest form of iron?

Steel
Wrought iron
Pig iron
Cast iron

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Chemistry
Iron is extracted from

Dolomite
Haematite
Bauxite
Cinnabar

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Chemistry
Stainless steel is an alloy of

Carbon and iron
Chromium and carbon
Chromium, carbon and iron
Chromium and iron

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