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प्रश्न
How did the name 'hydrogen' originate?
उत्तर
The name 'hydrogen' originated on account of its ability to form water.
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In electrolysis of water, dilute sulphuric acid is added to increase ..................of water.
Hydrogen gas is collected by the downward displacement of water. Give reason ?
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Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
‘Hydrogen is obtained by electrolysis of acidified water’.
Answer the following pertaining to the preparation of hydrogen by electrolysis,
Name the electrode –
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Complete and balance the equation:
[General method]
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Magnesium - Mg + H2O → ______+ _______ [g]
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Reactions of metals with dilute acids
Zinc - Zn + 2HCl → ______ + _______ [g]
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[Industrial Method - Bosch process]
- Step I - Production of water gas -
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\[\ce{CO + H2 + H2O->[450°C][Fe2O3]}\] _____ + ____ [g] - Step III - Removal of unreacted carbon dioxide and carbon monoxidefrom the above mixture
KOH + CO2 → _________ + ______
CuCl + CO + 2H2O → _______
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
