Question

ans kar do ....... Plz

Answer 1

5
in so2 a colourless gas is evolved
but in
cl2 greenish yellow gas is evolved
6
no2 turns moist potassium iodide paper brown
and
cl2 turns potassium bromide paper red
7
If you bring H2 close to a burning splinter the splinter goes off with a pop sound
if you bring O2 close to a burning splinter it relights a glowing burning splinter
8
O2 is neutral towards litmus
Nh4 turns red litmus blue

Answer 2

CuCO3 → CuO + CO2 

ZnCO3 → ZnO + CO2 

2Na2CO3 → 4NaO + CO2