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Chemistry

Chemistry
Which one of the following does not contain Silver ?

Ruby Silver
Horn Silver
German Silver
Lunar Caustic

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Chemistry
An electric iron has a heating element made of :

Tungsten
Copper
Zinc
Nichrome

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Chemistry
Helium gas is used in gas balloons instead of hydrogen gas because it is

More abundant than hydrogen
More stable
Non-combustible
Lighter than hydrogen

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Chemistry
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

4
zero
5
2

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Chemistry
Catalyst is a substance which

Increases the rate of the reaction
Decreases the rate of reaction
Has no action on the rate of the reaction
None of these

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Chemistry
The most common cause of pollution of air is

Carbon monoxide
Smoke
Sulphur dioxide
Carbon dioxide

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MORE MCQ ON Chemistry

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