Question

Select true statements.

• A. $\text{cis-1-bromo-1,2-difluoroethene}$ and $\text{Z-1-bromo-1,2-difluoroethene}$ are geometrical isomers
• B. The boiling point of is less than that of
• C. Resonance does not effect bond length
• D. In the molecule, the most acidic $H$ is connected directly to oxygen and not to the methylene carbon

Answer 1

Answer: (A), (B), (D)

In the molecule, the most acidic $H$ is connected directly to oxygen and not to the methylene carbon

(a) Resonance effects bond length.

(b) $\text{cis-1-bromo-1,2-difluoroethene}$ and $\text{Z-1-bromo1,2-difluoroethene}$ are geometrical isomers.

(c)
(d) Catechol (1,2-dihydroxybenzene) has higher boiling point than phenol due to following reasons:
i) shape
ii) molecular mass
iii) polarity - catechol is nearly twice as polar in terms of dipole moment.