Name a metallic oxide soluble in excess of caustic soda solution?

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Solution

Zinc oxide is the metal oxide that is soluble in excess of caustic soda (sodium hydroxide) solution.
$\underset{Zinc oxide}{ZnO (s)} + \underset{Sodium hydroxide}{2 NaOH (aq)} \to \underset{Sodium zincate}{{Na}_{2} {ZnO}_{2} (aq)} + \underset{Water}{H_{2} O (l)}$

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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.

Name :

(a) a metallic hydroxide soluble in excess of $N H_{4} O H$ .
(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.

Name:

(a) A metallic hydroxide soluble in excess of ${NH}_{4} OH$ .

(b) A metallic oxide soluble in excess of caustic soda solution.

(d) A weak alkali.

(e) Two coloured metal ions.

(f) Two colourless metal ions.

(g) Two bases which are not alkalis but dissolve in strong alkalis.

(h) A metal that evolves a gas which burns with a pop sound when boiled with alkali solutions. (Also give balanced equation).

(i) A coloured metallic oxide which dissolves in alkalis to yield colourless solution. (Also give balanced chemical equation).

(j) A chocolate brown oxide which becomes colourless on addition of hot caustic soda solution. (Also give balanced chemical equation).

Q2.

(a) Name a yellow monoxide that dissolves in hot and concentrated alkali. Give equation

(b) Name a white insoluble oxide that dissolves when fused with caustic soda or caustic potash.

(d) Identify the blue solution that turns deep blue on addition of excess of ${NH}_{4} OH$ .

(e) Name the hydroxide which is soluble in excess of ammonium hydroxide.

Name the metal hydroxide which are insoluable and soluable in caustic soda solution.

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Name a metallic oxide soluble in excess of caustic soda solution?

Zinc oxide is the metal oxide that is soluble in excess of caustic soda (sodium hydroxide) solution.ZnOsZincoxide+2NaOHaqSodiumhydroxide→Na2ZnO2aqSodiumzincate+H2OlWater

Zinc oxide is the metal oxide that is soluble in excess of caustic soda (sodium hydroxide) solution.
$\underset{Zinc oxide}{ZnO (s)} + \underset{Sodium hydroxide}{2 NaOH (aq)} \to \underset{Sodium zincate}{{Na}_{2} {ZnO}_{2} (aq)} + \underset{Water}{H_{2} O (l)}$