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Chemistry

Chemistry
The metal present in vitamin B12 is

Fe
Mo
Co
Mg

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Chemistry
Which is the purest form of iron?

Pig iron
Cast iron
Steel
Wrought iron

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Chemistry
Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?

Helium
Hydrogen
Oxygen
Nitrogen

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Chemistry
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is

Carbon dioxide
Oxygen
All of them
Hydrogen

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Chemistry
The coordination number of body centered atom in cubic structure is

10
6
4
8

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Chemistry
Galvanization is the :

Deposition of zinc on iron
Deposition of aluminium on iron
Deposition of tin on iron
Deposition of copper on iron

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