Question

Give your observations for following. write chemical equations also.

1. Zinc strip is immersed in hydrochloric acid.
2. Mercuric oxide is heated.
3. Red lead is heated strongly .
4. Iron rod is immered in copper sulphate solution.
5. Silver nitrate solution is added to sodium chloride. ​

Answer 1

Answer:

4). Iron rod is immersed in copper sulphate solution

Answer 2

Answer:

all answer in pic . form book if you have icse 7 chemistry page numbers 84 and 85 see it .