CHEMISTRY(KCET)
285668
The statement that is not correct is
1 aldose or ketose sugars in alkaline medium do not isomerise
2 carbohydrates are optically active
3 penta acetate of glucose does not react with hydroxylamine
4 lactose has glycosidic linkage between \(\mathrm{C}_4\) of glucose and \(\mathrm{C}_1\) of galactose unit.