Question

plz send the answers:-

1 )copper is exposed to air .

2 ) calcium oxide (quick lime) is mixed with water .

3) zinc dust reacts with copper sulphate .

4 ) ozone is subjected to heat and light . ​

Answer 1

Answer:

1. it change it colour and became corrosion

Answer 2

Answer:

1) Copper metal when exposed to air turns green in colour due to corrosion.

2) When water is added to calcium oxide (quicklime), it will be converted to calcium hydroxide (slaked lime) with the liberation of enormous amount of heat.

3) on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution.

4) Because of this "ozone-oxygen cycle," harmful ultraviolet radiation is continuously converted into heat.

Explanation:

I hope it will help you.