State what an aqueous solution of `NH_(3)` is called . State how it is prepared givin reasons.

An aqueous solution of NH_4F is …………….

Why is an aqueous solution of NH_4Cl acidic ?

State why an aqeous solution of ammonia [NH_(4)OH] is used for identifying cations.

State why an aq. solution of NH_(3) i] turns red litmus blue ii] is a weak base and a weak electrolyte.

Aqueous solution of NH_(4)Cl is …… in nature due to behaviour of….ion in solution:

State which of two - a solution of HCl in water or in toluene is an electrolyte , giving reasons

State true or false Aqueous solutions of borax acts as a buffer.

An aqueous solution of CoCl_(3).6NH_(3) is found to be a better conductor of electricity than an aqueous solution of CoCl_(3).4NH_(3) No ammonium ions are detected by addition of H_(2) SO_(4) to the solution of either of these compounds. Can you explain the difference in the conductivities of two solutions

On adding sodium acetate to aqueous solution of acetic acid, what happens to the pH of the solution? Give a reason for your answer.

How many of the given statements are true for potash alum. (1) it is a white crystalline solid (2) it swells up on heating (3) it imparts a golden yellow colour to the bunsen flame (4) An aqueous solution of the above given a white gelatinous precipitate with BaCl_(2) solution soluble only in concentrated sulphuric acid. (5) An aqueous solution of the above given a white gelatinous precipitate on treatment with NH_(4)OH . Which dissolves in aqueous NaOH in excess and reappears, On boiling with concentrated NH_(4)Cl solution. (6) It gives a yellow precipitate with Cobalt nitrile solution. (7) White precipitate in 5^(th) state can also be obtained by passing H_(2)S gas in aqueous solution of the above.