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Standard IX

Chemistry

Electrolysis of Water

Compare the c...

Question

Compare the chemical properties of metals and non-metals with reference to discharge of ions at the respective electrodes :

both deposit at anode

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both deposit at cathode

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non metals deposit at anode while metal deposit at cathode

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metals deposit at anode while non metal deposit at cathode

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Solution

The correct option is C non metals deposit at anode while metal deposit at cathode
As oxidation happens at anode so non metals always deposited at anode while metal always deposited at cathode (reduction)
At cathode: $N a^{+} + e^{-} \to N a$
At anode: $C l^{-} - e^{-} \to C l$

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Similar questions

Q. Assertion :In electrolyte refining of metal, impure metal is made cathode while a strip of pure metal is used as anode. Reason: The pure metal gets deposited at anode as anode mud.

Assertion: Impure copper anode will disappear and pure copper depositions will be seen on cathode.

Reason: During electrolysis, electicity flows and appropriate ions deposits at corresponding electrodes.

Q. In the electrolysis of

M^{n +} (a q)

, metal ions are discharged at negative electrode (cathode) and deposited there, above method of extraction is not possible for:

(a) The observation seen when fused lead bromide is electrolysed is :

(i) A silver grey deposit at an anode and a reddish brown deposit at the cathode.

(ii) A silver grey deposit at the cathode and a reddish brown deposit at the anode.

(iii) A silver grey deposit at the cathode and reddish brown fumes at the anode.

(iv) Silver grey fumes at anode reddish brown fumes at the cathode.

(b) During electroplating an article with silver, the electrolyte used is :

(i) Silver nitrate solution

(ii) Silver cyanide solution

(iii) Sodium argentocyanide solution

(iv) Nickel sulphate solution.

(d) State your observation: At the cathode when acidified aqueous copper sulphate solution is electrolysed with copper electrodes.

(e) State which electrode: anode or cathode is the oxidising electrode. Give a reason for the same.

(f) Name the king of particle present in :

(i) Sodium hydroxide soln.

(ii) Carbonic acid

(iii) Sugar soln.

(g) $M_{2} O$ is the oxide of a metal 'M' which is above hydrogen in the activity series. $M_{2} O$ when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity.

(i) State the reaction taking place at the cathode

(ii) Name the product at the anode.

Q. During electrolysis metals get deposited at ?

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Compare the chemical properties of metals and non-metals with reference to discharge of ions at the respective electrodes :

The correct option is C non metals deposit at anode while metal deposit at cathodeAs oxidation happens at anode so non metals always deposited at anode while metal always deposited at cathode (reduction)At cathode: Na++e−→NaAt anode: Cl−−e−→Cl

The correct option is C non metals deposit at anode while metal deposit at cathode
As oxidation happens at anode so non metals always deposited at anode while metal always deposited at cathode (reduction)
At cathode: $N a^{+} + e^{-} \to N a$
At anode: $C l^{-} - e^{-} \to C l$