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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.


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