The acidic strength of the hydrogen halides (HX) increases down the group: . This trend is due to the decreasing bond strength of the H-X bond as the size of the halogen atom increases. The weaker the bond, the more readily the hydrogen ion (H+) can dissociate, resulting in a stronger acid. Thus, statement (1) is incorrect.
The other statements are correct:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector
of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take SI units)
Reason R : , where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :
List-I | List-II | ||
(A) | 1 mol of H2O to O2 | (I) | 3F |
(B) | 1 mol of MnO-4 to Mn2+ | (II) | 2F |
(C) | 1.5 mol of Ca from molten CaCl2 | (III) | 1F |
(D) | 1 mol of FeO to Fe2O3 | (IV) | 5F |