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प्रश्न
Give reason for the following:
In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified.
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उत्तर
Pure or distilled water is bad conductor of electricity and does not form ions. To increase the number of H+ ions distilled water is acidified and made good conductor of electricity.
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संबंधित प्रश्न
Which metal is preferred for the preparation of hydrogen?
from acid?
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
Which of the acids dilute sulphuric, concentrated sulphuric, dilute nitric acid and concentrated nitric acid would you choose? Explain why you would not use the acids you reject.
Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.
‘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.
Starting from hydrogen gas how would you obtain a neutral liquid.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Sodium - 2Na + 2H2O → ______+ _______ [g]
Account for the following fact:
Potassium and sodium are not used to react with dilute ‘hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
Give a reason for the following.
Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid.
