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Chemistry

Chemistry
In electro-refining, the pure metal is deposited on

Anode
Cathode
Electrolyte
Vessel

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Chemistry
The lightest gas which is non-inflammable is

Helium
Hydrogen
Nitrogen
Oxygen

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Chemistry
If a buffer solution is diluted its pH

Remains same
Will slowly increase and then it will decrease
Is decreased
Is increased

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Chemistry
Nitrogen forms a variety of compounds in all oxidation states ranging from

–3 to + 4
–3 to + 5
–3 to + 3
–3 to + 6

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Chemistry
Normal rainwater is slightly acidic due to the presence of

Sulphur dioxide
Methane
Carbon dioxide
None of these

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Chemistry
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :

Galvanization
Zinc plating
Vulcanization
Alloy formation

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