Hydrogen cyanide adds to propanal. Which absorptions would be seen in the infra-red spectrum of the product? 1. a weak peak in the range $2200-2250\ \text{cm}^{-1}$ 2. a strong peak in the range $3200-3600\ \text{cm}^{-1}$ 3. a strong peak in the range $1040-1300\ \text{cm}^{-1}$
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct