Question

plzz Snd me ans of 20,22​

Answer 1

20) quick lime and slaked lime.

It is used for neutralising the acidity in soil.

22) black- silver sulphide (Ag2S)

green -copper carbonate(CuCo3.Cu(OH)2)

2Ag +H2S>>>>>Ag2S+H2

2Cu+H2O+CO2+O2>>>>>>CuCo3.Cu(OH)2

Hope this helps u