1.

Ziesel's method involves the estimation of

Answer»

`-OCH_3` and `-OC_2H_5` GROUPS
`-CH_3` and `-C_2H_5` groups
`CH_3COO-` and `C_2H_3CH_2COO-` groups
All the above.

SOLUTION :`-OCH_2` and `-OC_2H_5` groups.


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