CSIR NET – 2012 Q: 143

CSIR NET – 12

Q: 143 – The osazone A could be obtained from –

                 A)    Glucose and mannose                      B)           Mannose and galactose

                 C)     Gulose and fructose                        D)     Galactose and fructose

Answer : A) Glucose and mannose

Explanation :

• Osazones are a class of carbohydrate derivatives found in organic chemistry formed when sugars are reacted with phenylhydrazine.

• A general reaction showing the formation of an osazone. D-glucose reacts with phenylhydrazine to give glucose osazone. The same product is obtained from mannose.

 

Author : Vishnu Mestry

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