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BITSAT 2016 Paper
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Section:
Chemistry
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© examsnet.com
Question : 60 of 150
Marks:
+1
,
-0
What will happen when D-(+)-glucose is treated with methanolic —HCl followed by Tollens’ reagent ?
A black ppt. will be formed
A red ppt. will be formed
A green colour will appear
No characteristic colour or ppt. will be formed.
Validate
Solution:
Reaction of D-(+)-glucose with methanolic —HCl leads to formation of methyl glucoside (
C
1
—
O
H
group is methylated) which, being acetal, is not hydrolysable by base, so it will not respond Tollens’ reagent.
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