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प्रश्न
Name the impurities present in hydrogen prepared in the laboratory.
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उत्तर
Hydrogen sulphide, sulphur dioxide, oxides of nitrogen, phosphine, arsine, carbon dioxide and water vapour are impurities present in the laboratory.
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
Nitric acid cannot be used to prepare hydrogen by its action on active metals.
Indicate which of the following statement is true and which is false:
Zinc can liberate hydrogen from water, acid and alkali solution.
How is hydrogen gas collected? Why?
Multiple Choice Question
In metal activity series the more reactive metals are at
TRUE \ FALSE
Lead reacts briskly with dilute hydrochloric acid to form hydrogen.
Why is granulated zinc preferred in the laboratory preparation of hydrogen?
Give reason:
Apparatus for laboratory preparation of hydrogen should be airtight and away from a naked flame.
Give balanced equation for the following conversion:
Acidified water to hydrogen – by electrolysis.
Give reason for the following:
In the laboratory preparation of hydrogen from zinc and dilute hydrochloric acid – the zinc used granulated zinc.
The diagram represent the preparation and collection of hydrogen by a standard laboratory method.
State what difference will be seen if pure zinc is added in the distillation flask ‘X’ instead of granulated zinc.
