$\mathop {{C_{12}}{H_{22}}{O_{11}}}\limits_{Sucrose}  + {H_2}O\xrightarrow{{{H_2}S{O_4}}}\mathop {{C_6}{H_{12}}{O_6}}\limits_{D - ( + ) - glu\cos e}  + \mathop {{C_6}{H_{12}}{O_6}}\limits_{D - ( - ) - fructose} $

Solution of sucrose is dextrorotatory (specific rotation $=+66.1^{\circ}$ ) but after hydrolysis gives dextrorotatory glucose and levorotatory fructose. The solution of formed product is found to be levorotatory (specific rotation $\left.=-20.0^{\circ}\right)$