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प्रश्न
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
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उत्तर
Purified and dried hydrogen is collected over mercury because mercury has no reaction with it.
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संबंधित प्रश्न
Fill in the blank
Hydrogen is ...................soluble in water.
How do different metals displace hydrogen from water? Explain with the help of equations.
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Complete and balance the following reaction.
Na + H2O →_____________ +___________
Complete and balance the following reaction.
Fe + HCl →_____________ +___________
‘Hydrogen is obtained by electrolysis of acidified water’.
Answer the following pertaining to the preparation of hydrogen by electrolysis,
Name the electrode –
- through which the current enters the electrolyte.
- at which hydrogen is liberated.
Complete and balance the equation:
[General method]
Reactions of metals with steam
Aluminium - 2Al + 3H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Iron - Fe + 2HCl → ______ + _______ [g]
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{MgO + H2}\]
