Question

1. Name two coloured and two colourless metal ions.

2. A strong and weak alkali.

3. A salt of zinc which is efflorescent.

4. The ion responsible for the blue colour of an aqueous solution of a

salt.

5. One metal which forms more than one type of positive ions. 6. A yellow monoxide that dissolves in hot and concentrated caustic alkali.

7. A chloride which gives reddish brown precipitate with sodium hydroxide solution.

8. A metallic hydroxide which is insoluble in caustic soda but soluble in excess of NH OH.

9. A metal that evolves a gas which burns with a pop sound when boiled with alkai solutions.

10. An oxide which dissolves in both acid as well as base.

11. An amphoteric oxide.

12. A metallic hydroxide soluble in excess of ammonium hydroxide solution.​

Answer 1

Explanation:

1)Sodium ion and Potassium ions are colourless.

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Answer 2

Answer:

1. ferric and cupric ion are coloured whereas sodium and pottasium

2.strong is sodium hydroxide and weak is ammonia

3. zinc

4. Cu^+2 are blue in colour

5. iron

6.PbO

7.ferric chloride

8. copper hydroxide

9. alluminium

10.zinc oxide

11.tin

12.copper hydroxide

Explanation:

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