Question 19
Gas LawsWhich of the compounds has the lowest vapour density? [O= 16, Cl= 35.5, H= 1, C= 12]
- A.Propanol
- B.Ethanoic acid
- C.Ethanal
- D.Dichloromethane
Show the answer and explanation
Answer: C (Ethanal)
Explanation
Vapour density = Mr/2. Propanol 60, ethanoic acid 60, ethanal 44, dichloromethane 85; ethanal gives the lowest (22).