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प्रश्न
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
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उत्तर
Reduction of Fe2O3 (iron oxide) on heating to metal iron.
\[\ce{Fe2O3 + 3H2 ->\underset{\text{Reduced to metal}}{2Fe} + 3H2O}\]
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संबंधित प्रश्न
Multiple Choice Question
Water gas is a mixture of
Why nitric acid is not used in the preparation of hydrogen?
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Give reason for the following:
The end of the thistle funnel should be dipped under acid.
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Complete and balance the following reaction.
Fe + HCl →_____________ +___________
Complete and balance the following reaction.
Zn + NaOH →_____________ +___________
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Calcium - Ca + H2O → ______+ _______ [g]
