Match List-I with List-II :
- A-IV, B-I, C-III, D-II
- A-III, B-IV, C-II, D-I
- A-II, B-III, C-I, D-IV
- A-I, B-II, C-IV, D-III
Answer
(1) A-IV, B-I, C-III, D-II
Solution
Every single bond is 1σ; a double bond is 1σ + 1π; a triple bond is 1σ + 2π.
A. C2H4 ( H2C=CH2): 4 C–H σ + 1 C–C σ + 1 π ⇒ 5σ, 1π → IV
B. C2H2 ( H-C C-H): 2 C–H σ + 1 C–C σ + 2 π ⇒ 3σ, 2π → I
C. CH4: 4 C–H σ ⇒ 4σ → III
D. NH3: 3 N–H σ and one lone pair on N → II
∴ A-IV, B-I, C-III, D-II
Answer: (1)