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प्रश्न
With reference to the uses of hydrogen, give reason for the following:
Hydrogen is not used in air balloons
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उत्तर
Hydrogen gas in ‘highly inflamable’ i.e. catches fire. Hence generally it is not used in air balloons.
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संबंधित प्रश्न
Write two physical properties of hydrogen.
Discuss the occurrence of hydrogen in the universe and on the earth ?
Hydrogen is evolved when dilute HCl reacts with magnesium, but nothing happens in the case of mercury and silver. Explain.
Under what conditions can hydrogen be made to combine with nitrogen?
Name the products and write the equation for the reaction.
With reference to the uses of hydrogen, give reason for the following:
A mixture of hydrogen & oxygen on burning, find application in welding & cutting metals.
Complete and balance the equation:
Conversion of hydrogen to -
Water - 2H2 + O2 → ________
Complete and balance the equation:
Conversion of hydrogen to -
Hydrogen sulphide - H2 + S → ________
Complete and balance the equation:
Hydrogen in metallurgy - reduction of
Iron [III] oxide - Fe2O3 + 3H2 → ________ + ______
Why is copper not used to prepare hydrogen by the action of dilute hydrochloric acid or dilute sulphuric acid on the metal, [copper [Cu] below hydrogen – no reaction]
State the use of hydrogen –
In hydrogenation of oil and coal
