The number of correct statements about dihydrogen are

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The largest single use of dihydrogen is

in the synthesis of NH₃ while is used

in the manufacture of HNO₃ and

nitrogenous fertilizers.

It is used to reduce heavy metal oxides.

It is used as rocket fuel.

Atomic hydrogen and oxyhydrogen

torches find uses for cutting

and welding purpose

answer is B, A, C, D.

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Detailed Solution

Hydrogen has a low molecular mass which releases three times more energy than petrol and also the pollutants releases during combustion of hydrogen is lesser than the pollutants releases from the combustion of petrol. So, it is used as a rocket fuel.

Dihydrogen is used for the synthesis of NH₃ which is further used in the manufacturing of HNO₃ and nitrogenous fertilizers.

Dihydrogen is a reducing agent, therefore it can remove oxygen from metal oxides.

Atomic hydrogen and oxyhydrogen torches find uses for cutting and welding purpose.

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