11.

State one chemical test between each of the following pairs:

Sodium carbonate and Sodium sulphite

State one chemical test between each of the following pairs:

Manganese dioxide and copper (II)oxide.

Name the gas in each of the following:

 The gas evolved on the reaction of Aluminium with boiling concentrated caustic alkali solution.

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An aqueous electrolyte consists of the ions mentioned in the list the ion which could be discharged most readily during electrolysis .
[Fe²⁺ Cu²⁺Pb²⁺H⁺]

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The metallic electrode which does not take part in an electrolytic reaction [Cu, Ag,Pt,Ni]

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The ion which is discharged at the anode during the electrolysis of copper sulphate solution using copper electrodes as anode and cathode [Cu²⁺,OH^-, SO^2-₄,H⁺]

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(iv)When dilute sodium chloride is electrolyzed using graphites electrodes, the cation is discharged at the cathode most readily.  .[Na⁺, OH^-, H⁺, Cl^-]

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During silver plating of an article using potassium argentocyanide as an electrolyte, the anode material should be [Cu, Ag,Pt,Fe].

Name the following metal;
A metal present in cryolite other than sodium. 

Name the following metal;
A metal which unaffected by dilute or concentrated.