Write balanced equations for:
(a)a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
(b)a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Q.

Name :

(a) a metallic hydroxide soluble in excess of $N{H}_{4}OH$.
(b) a metallic oxide soluble in excess of caustic soda solution. (c) a strong alkali.
(d) a weak alkali.
(e) two colourless metal ions.
(f) two coloured metal ions.
(g) a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
(h) two bases which are not alkalis but dissolve in strong alkalis. (i) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
(j) a colourless cation, not a representative element.

Q. Name
(a) a metallic hydroxide soluble in excess of NH₄OH.
(b) a metallic oxide soluble in excess of caustic soda solution.
(c) a strong alkali
(d) a weak alkali
(e) two coloured metal ions.
(f) two bases which are not alkalis but dissolve in strong alkalis.
(g) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Q.

A metallic carbide on treatment with water gives a colourless gas which burns readily in air and which gives a precipitate with ammonical silver nitrate solution. Gas evolved is

Q. The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?

Q. When metals reacts with acid the gas which is realeased burns with a pop sound