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प्रश्न
In the laboratory preparation of hydrogen from zinc and dil. acid. Give a reason for the following:
Hydrogen is not collected over air.
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उत्तर
Air forms an explosive mixture with H2.
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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.
Give reason for the following:
Nitric acid not used for the preparation of hydrogen gas?
Name the following:
A metallic oxide which can be reduced into metal by hydrogen.
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.
Under what conditions can hydrogen be made to combine with chlorine?
Name the products and write the equation for the reaction.
Draw neat labelled diagrams for two different experiments to prove that – hydrogen is lighter than air.
Give reason for the following:
In the laboratory preparation of hydrogen from zinc and dilute hydrochloric acid – the zinc used granulated zinc.
Give a balanced equation for the following conversions sodium aluminate from aluminium.
Select the correct answer from the symbol in the bracket.
The element which forms a diatomic molecule.
