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Chemistry

Chemistry
Which of the following gases will effuse out of football bladder most quickly ?

N 2
He
O2
H2

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Tinning
Electroplating
Hot dipping
Galvanising

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Chemistry
The metal compound commonly found in Sindhoor or Kumkum is based on

Tin
Zinc
Lead
Copper

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

Electrolyte
Vessel
Anode
Cathode

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Chemistry
Magnetite is

Fe3O4
2Fe2O3. 3H2O
FeCO3
Fe2O3

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Chemistry
The chemical name of 'Plaster of Paris' commonly used for setting broken bones is

Calcium sulphate
Calcium nitrate
Calcium carbonate
Calcium chloride

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