Advertisements
Advertisements
Question
‘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.
Advertisements
Solution
- Electrode through which current enters the electrolyte is anode.
- Electrode at which hydrogen is liberated is cathode.
APPEARS IN
RELATED QUESTIONS
Give reason for the following:
Though hydrogen is lighter than air it cannot be collected by downward displacement of air.
For laboratory preparation of hydrogen, give the following:
chemical equation
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
‘Hydrogen is obtained by electrolysis of acidified water’.
Answer the following pertaining to the preparation of hydrogen by electrolysis,
The meaning of the term ‘electrolysis’ and ‘electrolyte’.
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.
A white substance which leaves an amphoteric oxide as a residue [whose colour varies in the heated and in the cold state] and evolves a gas which turns lime water milky.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Sodium - 2Na + 2H2O → ______+ _______ [g]
Give a balanced equation for obtaining hydrogen from?
Steam using a trivalent metal
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
