A blue litmus paper is dipped into an aqueous solution of `NH_4NO_3`. Is there any colour change? Substantiate your answer.

Assumes that a fresh piece of KCI crystal is heated in an atmosphere of potassium vapour. Is there any colour change? Substantiate your answer.

a. NaCl does not exhibit Frenkel. Defect. Do you agree? Justify. b: Assume that a fresh piece of KCl crystal is heated in an atmosphere of potassium " vapours. Is there any. C0lour change? Substantiate your answer.

Predict whether an aqueous solution of (NH_4)_2SO_4 is acidic, basic or neutral?

The colour of light absorbed by an aqueous solution of CuSO_4 , is

An aqueous solution of 'A l_2((SO_4)_3)' would show:

The aqueous solutions of HCOONa, C_6H_5NH_3Cl and KCN are respectively.

Keep the litmus paper for some more time at the mouth of the boil-ing tube and then observe its colour change. What is the change occurred?

When Zn rod is dipped in CuSO_4 solutions, Zn rod become blue. What is the reason for this?

Statement 1: When a copper wire is dipped in silver nitrate solution, there is no change in the colour of the solution. Statement 2: Copper cannot displace silver from its salt solution