Choose the correct statement(s).

Hydrogen is used in the oxyhydrogen torch

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Hydrogen is used in rocket fuels

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Hydrogen is used in Haber's process for manufacturing of ammonia

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Hydrogen is used in fluorescent bulbs

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Solution

The correct options are
A
Hydrogen is used in the oxyhydrogen torch

B
Hydrogen is used in rocket fuels

C
Hydrogen is used in Haber's process for manufacturing of ammonia

It is also used in oxyhydrogen torches, where hydrogen and oxygen are taken in a ratio of 2:1 by mass.
Due to its high calorific value hydrogen is also used as the rocket fuel.
Hydrogen is used in Haber's process along with Nitrogen in 1:3 by volume for manufacturing of ammonia.
Argon gas is used instead in flouroscent tubes to stop the oxygen from corroding the hot tungsten filament.

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