Paper: CSIR-NET June 2018 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Hydrogen Bonding Weak Interactions · Marks: 2 · Difficulty: Medium
Consider the nature of solvents in column I and the corresponding max for l in various solvents given in column II. (for I, vapor axis 520 nm). Match column I with column II
Column - I
Column - II
(a)
Non-donor
(i)
520
(b)
Weak donor
(ii)
500
(c)
Strong donor
(iii)
450
(d)
$\pi$ electron donor
(iv)
360
(a)(a)-(i); (b)-(ii); (c)-(iii); (d)-(iv)
(b)(a)-(iii); (b)-(iv); (c)-(ii); (d)-(i)
(c)(a)-(i); (b)-(iii); (c)-(iv); (d)-(ii)
(d)(a)-(iv); (b)-(iii); (c)-(ii); (d)-(i)
Answer
Answer: C ✓ checked by 4AB · confidence low
Explanation
I₂ absorbs at 520 nm in non-donor solvents. Donor complexation blue-shifts the band: π-donors (benzene) to about 500 nm, weak n-donors to about 450 nm, and strong n-donors (amines) to about 360 nm. That gives a-i, b-iii, c-iv, d-ii (c).