For 'invert sugar', the correct statement(s) is (are)
(Given : specific rotations of (+) - sucrose, (+) - maltose, + `66^(@),+140^(@), -52^(@) and 92^(@)` respectively)

Options

A. 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
B. 'invert sugar' is an equimolar mixture of `D-(+)`glucose and `D-(-) -`fructose
C. specific rotation of 'invert sugar' is `-20^(@)`
D. on reaction with `Br_(2)` water, 'invert sugar' forms saccharic acid as one of the products.

Answer

B, C

Explanation

Invert sugar is an equimolar mixture of `D-(+)-` glucose and `D-(-)-` frucotse. The specific rotation, `[alpha]` of `L-(-)-` glucose and `L-(+)` fructose are `-52^(@) and +92^(@)` respectively. Therefore,
`[alpha]" of "D-(+)-" glucose"=+52^(@)`
`[alpha]" of "D-(-)-" frucotse"=-92^(@)`
Specific rotation of invert sugar`=0.5xx[alpha]" of "D-(-)-"fructose"`
`=0.5xx(+52^(@))+0.5xx(-92^(@))=-20^(@)`