Help me out please

Dear student,

a) CO reacts with excess O₂
2CO + O₂ --------------> 2CO₂
Observation: Carbon dioxide will be formed.
​​​​On passing the formed gas in lime water, it will turn milky

b) Silver oxide is decomposed
2AgO --------> 2Ag + O₂
Observation: Silver metal will be formed along with oxygen.
There will be deposition of silver.

c) Calcium burns in O₂
2Ca + O₂ ------> 2CaO
Observation: calcium will burn in oxygen to form calcium oxide.

Regards.