Engineering
Chemistry
Carbohydrate
Test of aldehydes
Aldol condensation
Question

Given are the structures of cyclic D-glucoside.

Moles of HCHO formed are :
 

1, 1

2, 2

1, 2

2, 1

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Solution
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Both X and Y gives 1, 1 moles of HCHO respectively.
Cleavage of glycolic bond by HlO4 :-
Converts alcohol → Carbonyl
Carbonyl → acid.