State whether the given statement is true or false:

When $N a C l (a q)$ is electrolysed, sodium metal is formed at the cathode and chlorine gas is formed at anode.

True

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False

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Solution

The correct option is B False
The Electrolysis of Aqueous NaCl:
Cathode(-):
$2 H_{2} O (l) + 2 e^{-} \to H_{2} (g) + 2 O H^{-} (a q)$
Anode(+):
$2 C l^{-} \to C l_{2} + 2 e^{-}$

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When conc. NaCl is electrolysed using mercury as cathode and graphite as anode then which of the following is true :

Name the gas that evolved at cathode and anode when water is electrolysed. State their ratio by volume.

e^{-}

State whether the given statement is true or false.

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