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प्रश्न
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
उत्तर
\[\ce{2Al + 2KOH + 2H2O->2KAlO2 + 3H2}\]
\[\ce{Zn + 2KOH->K2ZnO2 + H2}\]
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In electrolysis of water, dilute sulphuric acid is added to increase ..................of water.
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aluminium
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Fe + HCl →_____________ +___________
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Name the electrode –
- through which the current enters the electrolyte.
- at which hydrogen is liberated.
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The metal which reacts with steam liberating hydrogen & the reaction is reversible.
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
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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.
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Hydrogen sulphide
