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Chemistry

Chemistry
Which is not a green house gas ?

Chlorofluorocarbons
N2O
CO2
CH4

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Chemistry
The metal present in vitamin B12 is

Mg
Fe
Mo
Co

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Chemistry
Atomic number is the number equal to

Neutrons
Protons
None of these
Electrons

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Chemistry
Which of the following fuels causes minimum environmental pollution?

Hydrogen
Coal
Diesel
Kerosene

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Chemistry
The working of a dry cell is based on

Combination reaction
Spontaneous oxidation-reduction reaction
Decomposition reaction
Electrolysis

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Chemistry
The most abundant element in the human body is

Nitrogen
Oxygen
Iron
Carbon

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MORE MCQ ON Chemistry

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