Question

9. Sel (a 1. Write the probable colour of the following salts: (a) Ferrous salts (c) Cupric salts (e) Aluminium salts. (b) Ammonium salts (d) Calcium salts (b 2. Name : ( 10. 11. 12. (a) a metallic hydroxide soluble in excess of NH,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. G) a colourless cation not a representative element. 3. Write balanced equations for Q. 2 (g) and (i). 4. What happens when ammonia solution is added first dropwise and then in excess to the following solutions : (i) CuSO4 (ii) ZnSO4 (iii) FeCl2 Write balanced equations for these reactions. 5. What do you observe when caustic soda solution is added to the following solution, first a little and then in excess: (a) FeCl3, (b) ZnSO4, (c) Pb(NO3)2, (d) CuSO4 ? Write balanced equations for these reactions. 6. Name the chloride of a metal which is soluble in excess of ammonium hydroxide. Write equation for the same. 7. On adding dilute ammonia solution to a colourless solution of a salt, a white gelatinous precipitate appears. This precipitate however dissolves on addition of excess of ammonia solution. Identify (choose from Na, Al, Zn, Pb, Fe) (a) Which metal salt solution was used ? (b) What is the formula of the white gelatinous precipitate obtained ? 8. 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. 13 14 15​

Answer 1

Answer:

Name the chloride of a metal which is soluble in excess of ammonium hydroxide. Write equation for the same. 7. On adding dilute ammonia solution to a colourless solution of a salt, a white gelatinous precipitate appears. This precipitate however dissolves on addition of excess of ammonia solution. Identify (choose from Na, Al, Zn, Pb, Fe) (a) Which metal salt solution was used ? (b) What is the formula of the white gelatinous precipitate obtained ? 8. 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. 13 14 15

Answer 2

Answer:

karo karl pse os off is of