Assertion A : The dihedral angles in H2O2 in gaseous phase is 90.2° and in solid phase is 111.5°.

Question

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

Assertion A : The dihedral angles in H₂O₂ in gaseous phase is 90.2° and in solid phase is 111.5°. 

Reason R : The change in dihedral angle in solid and gaseous phase is due to the difference in the inter molecular forces. 

Choose the most appropriate answer from the options given below for A and R. 

(1) A is correct but R is not correct. 

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

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

(4) A is not correct but R is correct.

Answer 1

Answer is :(4) A is not correct but R is correct.

(a) H₂O₂ structure in gas phase, dihedral angle is 111.5°. 

(b) H₂O₂ structure in solid phase at 110K, dihedral angle is 90.2°. 

Hence given statement (A) is not correct But statement (B) is correct