1.

H_(2)COH CH_(2)OH on heating with periodicacid gives :

Answer»

2HCHOOH
`underset(CHO)underset(|)CHO`

`2CO_(2)`

Solution :1, 2 - DIOLS, when treated with an aqueous solution of PERIODIC acid give aldehyde or ketones
`underset(CH_(2)OH)underset(|)CH_(2)OH overset(HIO_(4))to CH_(2)O+ CH_(2)O`
Note that a `1^(@)` ALCOHOL gives `CH_(2)O` since in glycol both the OH groups are primary hence give 2 MOLECULES of `CH_(2)O` as by product.


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