Statement 1: A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of a little hydrochloric acid, it becomes laevorotatory.Statement 2: Sucrose on hydrolysis gives unequal amounts of glucose and fructose. As a result of this, change in sign of rotation is observed.

The hydrolysis of sucrose by boiling with a mineral acid (HCl), produces a mixture of equal molecules of D-glucose and D-fructose. Sucrose solution is dextrorotatoryspecific rotation - + 66.50. But on hydrolysis, it becomes  laevorotatory. The specific rotation of D-glucose is + 52o and of D-fructose is 92o. Therefore, the net specific rotation of an equimolar mixture of both is: +52o-92o2=-20o