Question

Mention with reason the colour changes observed when :
(i) silver chloride is exposed to sunlight.
(ii) copper powder is strongly heated in the presence of oxygen.
(iii) a piece of zinc is dropped in copper sulphate solution.​

Answer 1

Answer:

1=When white Silver chloride exposed to sunlight it produces to black metallic colured Silver along with liberation of Chlorine gas. This is a photodecomposition reaction. Ans: When white Silver chloride exposed to sunlight it produces to black metallic colured Silver along with liberation of Chlorine gas

2=Heated copper metal reacts with oxygen to form the black copper oxide. The copper oxide can then react with the hydrogen gas to form the copper metal and water. When the funnel is removed from the hydrogen stream, the copper was still be warm enough to be oxidized by the air again

3=on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. This is indicated by colour change from blue to colourless. CuSO4 solution has a blue colour while ZnSO4 solution is colourless. Zn(s) + CuSO4(aq) -> Cu(s) + ZnSO4 (aq)

3=

Answer 2

Answer:

when agcl is exposed to sunlight it decomposes to form AG and CL this type of reaction is photolytic decomposition reaction its colour changes .. the colour of Silver will change into black and a chlorine gas is formed