1.
What are A, B, C in the following reactions?
(i) (CH3CO2)2CaΔ(\text{CH}_3\text{CO}_2)_2\text{Ca} \xrightarrow{\Delta} A
(ii) CH3CO2HRed P/HI\text{CH}_3\text{CO}_2\text{H} \xrightarrow{\text{Red P/HI}} B
(iii) 2CH3CO2HP4O102\text{CH}_3\text{CO}_2\text{H} \xrightarrow{\text{P}_4\text{O}_{10}} C