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.

Select the correct answer from the list given is brackets:

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⁺]

Select the correct answer from the list given is brackets:

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

Select the correct answer from the list given is brackets:

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⁺]

Select the correct answer from the list given is brackets:

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

Select the correct answer from the list given is brackets:

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.