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Chemistry

Chemistry
________ gives hardness to stainless steel.

Lead
Carbon
Tin
Zinc

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Chemistry
Cement is made hard with

Dissociation of water
Hydration and dissociation of water
Polymerisation
Dehydration

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

Zero
4
8
–4

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Chemistry
The next higher homologue of C6H14 is

C6H12
C7H14
C7H16
C7H12

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

Roasting
Refining
Smelting
Calcination

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Chemistry
The major component in the LPG is

Propane
Methane
Ethane
Butane

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