Question

For 'invert sugar', the correct statement(s) is (are)
(Given : specific rotations of (+) -sucrose, (+) -maltose, L-(-)-glucose and L-(+)-fructose in aqueous solution are $+{66}^0,+{140}^0,-{52}^0$ and ${92}^0$, respectively)

• A. 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
• B. 'invert sugar' is an eqimolar mixture of D-(+)-glucose and D-(-)-fructose
• C. specific rotation of 'invert sugar' is $-{20}^0$
• D. on reaction with $B{r}_2$ water, 'invert sugar' forms saccharic acid as one of the products

Answer 1

Answer: (A)

'invert sugar' is prepared by acid catalyzed hydrolysis of maltose

Invert sugar is a sucrose, partially or totally cleaved into fructose and glucose. Sucrose is converted into invert sugar by chemical reaction called hydrolysis by heating a mixture or solution of table sugar.

Also, breakdown of sucrose may happen in a reaction catalyzed by enzymes such as sucrose, invertase etc or by acid catalyzed hydrolysis of maltose.