Name:
(a) A yellow monoxide that dissolves in hot and concentrated caustic alkali.

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

(c) A compound containing zinc in the anion.

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Solution

(a) $P b O$
(b) $Z n O$
(c) $K_{2} Z n O_{2}$

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Name :

(a) a yellow monoxide that dissolves in hot and concentrated caustic alkali.
(b) a white, insoluble oxide that dissolves when fused with caustic soda or caustic potash.
(c) a compound containing zinc in the anion.

What is observed when hot concentrated caustic soda solution is added to (a) Zinc and (b) Aluminium oxide ? Write balanced equations.

Q. Caustic soda is insoluble in Water,ethanol and methanol.

State True or False:

Q. Assertion :When

H_{2} S

gas is passed into an aqueous solution of

Z n C l_{2}, Z n^{2 +}

ions are completely precipitated as zinc sulphide. Reason: Zinc sulphide is insoluble in solutions of caustic alkali but dissolves in dilute

H C I

What is the yellow coloured amphoteric oxide that reacts with caustic soda to give a colourless salt of sodium plumbate and water?

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Name:(a) A yellow monoxide that dissolves in hot and concentrated caustic alkali.(b) A white, insoluble oxide that dissolves when fused with caustic soda or caustic potash.(c) A compound containing zinc in the anion.

(a) PbO(b) ZnO(c) K2ZnO2

Name:
(a) A yellow monoxide that dissolves in hot and concentrated caustic alkali.

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

(c) A compound containing zinc in the anion.

(a) $P b O$
(b) $Z n O$
(c) $K_{2} Z n O_{2}$