Question

Assertion(A): On heating iodine crystal iodine vapours are formed.
Reason(R): lodine easily undergoes sublimation. (1m)
Both A and Rare true and Ris the correct explanation of A.
Both A and Rare true but Ris not the correct explanation of A.
ОООО
A is true but Ris false.
Ais false but Ris true.

Answer 1

Both A and R are true and R is the correct explanation of A.

We know that in the sublimation process, a direct change of state from solid to gas will take place. That is the case with iodine. On heating its crystals, you do not get a liquid, instead, it forms a gas, which means that sublimation takes place, and iodine is a sublimable substance.