1.

During electrolysis of molten NaCl, some water is added, what will happen?

Answer»

Electrolysis will stop.
Hydrogen will be evolved.
Some amount of caustic soda will be formed
A FIRE is likely

Solution :During electrolysis of MOLTEN `NACL` :
Reaction at cathode : `Na^(+)+e^(-)rarr Na`
Reaction at anode : `CL^(-)rarr(1)/(2)Cl_(2)+e^(-)`
By adding some water.
`Na+H_(2)OrarrNaOH+(1)/(2)H_(2)uarr`.
A fire is likely to take place due to vigorous reaction of sodium with water.


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