Question

Assertion : -The bond between F-F is weaker than between Cl-Cl.

Reason:- Atomic size of F is smaller than that of Cl.

Select the most appropriate answer from the options given below:

(A) Both A and R are true and R is the correct explanation of A

(B) Both A and R are true but R is not the correct explanation of A.

(C)A is true but R is false.

(D) A is false but R is true.​

Answer 1

(A) Both A and R are true and R is the correct explanation of A

• Bond between F-F is weaker because of very huge electronic repulsion between them. The mutual attraction and the bond strength between the two is diminished by strong inter electronic repulsion. This is why bond between F-F is weaker than between Cl-Cl.
• Since, Flourine lies on top of Chlorine atom in 17th group so it has a smaller size because atomic size increases along the group. So flourine will be smaller.
• It is because of very small size why flourine faces huge inter electronic repulsion. Hence, Both A and R are true and R is the correct explanation of A .