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Chemistry

Chemistry
The smog is essentially caused by the presence of

Oxides of N and S
O2 and O3
O2 and N2
O3 and N2

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Chemistry
Which one of the following elements is an example of noble gas ?

Chlorine
Hydrogen
Helium
Nitrogen

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Will be doubled
Will be reduced to half
Will increase four-fold
Remains unchanged

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Chemistry
The metal used to galvanise iron to protect it from rusting is

Antimony
Zinc
Chromium
Lead

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Chemistry
The most abundant inert gas in the atmosphere is

Neon
Helium
Argon
Krypton

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Chemistry
The metal chiefly used for galvanising iron is :

Cadmium
Zinc
Mercury
Tin

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