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Chemistry

Chemistry
The atmospheric gas that is mainly responsible for Green House effect :

Carbondioxide
Oxygen
Ozone
Nitrogen

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Chemistry
Main pollutants released from iron and steel industry are

NO, SO3 and H2S
CO2, NO2 and SO3
CO2, H2S and NO2
CO, CO2 and SO2

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Chemistry
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

a condensation reaction
an addition reaction
an elimination reaction
an oxidation reaction

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Chemistry
The percentage of Nitrogen in Air is

78.03
0.94
0.03
85.02

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Chemistry
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is

36
53
17
19

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Chemistry
Which amidst the following is not a gem stone ?

Pearl
Topaz
Opal
Cat's-eye

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MORE MCQ ON Chemistry

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