JEE Main 2026 — Apr 4, Shift 1 — Chemistry solution

JEE Main2026Apr 4, Shift 1Chemistry

Statement-I : The structure of Maltose is given below :

Statement-II : The structure of Lactose is given below

In the light of the above statements, choose the correct answer from the options given below

A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true

Solution

A disaccharide is reducing if at least one of its monosaccharide units retains a free hemiacetal (anomeric $- OH$ ) capable of opening to give an aldehyde.

In maltose (two glucose units joined by an $α$ - $1, 4$ glycosidic bond), the right-hand glucose still has a free anomeric $- OH$ . So maltose is reducing. Statement I (which claims it is non-reducing) is false.

In lactose (galactose- $β$ - $1, 4$ -glucose), the glucose unit retains a free hemiacetal $- OH$ . So lactose is reducing. Statement II is true.

← Back to full paper

Practice more Chemistry

Concept-wise practice with instant solutions on Fundamenthol.

Start practicing →