Hydrolysis of sucrose gives :

Solution

Chemistry ma’am · 3 steps

Sucrose is α-glucose joined to β-fructose; hydrolysis hands back exactly those two.

1. Structure of sucrose. In sucrose, C1 of α-D-glucose is joined to C2 of β-D-fructose by a glycosidic bond. Breaking that bond with dilute acid or the enzyme invertase releases the two units.
2. Sign of rotation. The (+) or (-) is the measured optical rotation, separate from D and from α or β. D-glucose is dextrorotatory (+52.5°) and D-fructose is laevorotatory (-92.4°). Because fructose rotates more strongly, the mixture turns left even though sucrose itself is (+). That is why the product is called invert sugar.

   Option	Glucose part	Fructose part	Verdict
   (a)	α, but (-): wrong sign	β, (-): correct	wrong
   (b)	α, (+): correct	α: wrong anomer	wrong
   (c)	(-): wrong sign	α, (+): wrong anomer and sign	wrong
   (d)	α, (+): correct	β, (-): correct	correct

3. So. Hydrolysis of sucrose gives α-D-(+)-glucose and β-D-(-)-fructose, option (d).

The idea to keep. Remember sucrose as α-glucose (C1) linked to β-fructose (C2). D tells you configuration and (+)/(-) tells you rotation: glucose is (+) and fructose is (-).

Answer from the NTA final answer key. Solution by PrepWiser.