For ‘invert sugar’, the total number of correct $$statement(s)$$ $$is(are)(Given$$ : specific rotations of $$(+)$$ $$-sucrose$$, $$(+)-maltose$$, $$L-(-)-glucose$$ and $$L-(+)$$ fructose in aqueous solution are $$+$$ $$66$$°, $$+140$$°, –$$52$$° and $$+92$$°, $$respectively)(I)$$ ‘invert sugar’ is prepared by acid catalyzed hydrolysis of maltose.(II) ‘invert sugar’ is an equimolar mixture of $$D-(+)-glucose$$ and $$D-(-)-fructose$$.(III) specific rotation of ‘invert sugar’ is –$$20$$°.(IV) on reaction with $$Br2$$ water, ‘invert sugar’ forms saccharic acid as one of the products.

Question

For ‘invert sugar’, the total number of correct $$statement(s)$$ $$is(are)(Given$$ : specific rotations of $$(+)$$ $$-sucrose$$, $$(+)-maltose$$, $$L-(-)-glucose$$ and $$L-(+)$$ fructose in aqueous solution are $$+$$ $$66$$°, $$+140$$°, –$$52$$° and $$+92$$°, $$respectively)(I)$$ ‘invert sugar’ is prepared by acid catalyzed hydrolysis of maltose.(II) ‘invert sugar’ is an equimolar mixture of $$D-(+)-glucose$$ and $$D-(-)-fructose$$.(III) specific rotation of ‘invert sugar’ is –$$20$$°.(IV) on reaction with $$Br2$$ water, ‘invert sugar’ forms saccharic acid as one of the products.

Infinity Learn · Accepted Answer

Invert sugar is an equimolar mixture of $$D-(+)$$ glucose and $$D($$–$$)$$ glucose.Specific rotation of invert sugar $$=-92$$°$$+52$$°$$2=-20$$°$$D-glucose$$ on oxidation with $$Br2-water$$ producesgluconic acid and not saccharic acid.

Detailed Solution

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