JEE Main 2020 (6 Sep, Shift 2) Chemistry Q26: Carbohydrates

Question

Which one of the following statements is not true ?

Accepted Answer

Option 4: Lactose contains $\alpha$-glycosidic linkage between $\mathrm{C_1}$ of galactose and $\mathrm{C_4}$ of glucose.

Answer

Lactose ($\mathrm{C_{11}H_{22}O_{11}}$) is a disaccharide and it contains 8 hydroxyl groups.

Answer

On acid hydrolysis, lactose gives one molecule of D(+)-glucose and one molecule of D(+)-galactose.

Answer

Lactose is a reducing sugar and it gives Fehling's test.

Answer

Lactose contains $\alpha$-glycosidic linkage between $\mathrm{C_1}$ of galactose and $\mathrm{C_4}$ of glucose.

JEE Main 6 September 2020, Shift 2, Chemistry Q26