The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :

Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R).

Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.

Reason (R) : Sucrose involves glycosidic linkage between C₁ of $$\beta$$-glucose and C₂ of $$\alpha$$-fructose.

Choose the most appropriate answer from the options given below :

Match List - I with List - II :


Choose the most appropriate match :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Barium carbonate is insoluble in water and is highly stable.

Reason (R) : The thermal stability of the carbonates increases with increasing cationic size.