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प्रश्न
Select the correct options for the following statement:
The metal which reacts with steam liberating hydrogen & the reaction is reversible.
पर्याय
Nickel
Sodium
Iron
Iron [III] oxide
Magnesium oxide
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उत्तर
Iron
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संबंधित प्रश्न
Fill in the blank
Hydrogen is ...................soluble in water.
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Complete and balance the following reaction.
Ca + H2O →_____________ +___________
Complete and balance the following reaction.
Mg + H2O →_____________ +___________
Complete and balance the following reaction.
Fe + HCl →_____________ +___________
Give reason:
A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.
Correct the following statement:
Hydrogen is separated from CO by passing the mixture through caustic potash solution.
‘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.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An efflorescent substance which leaves a residue having the same colour as the substance and evolves a gas which changes the colour of cobalt chloride paper.
