Question

Which of the following statements are correct regarding the halogens?

• A. All halogens exist as diatomic gaseous molecules at ordinary temperature
• B. Bromine dissolves in chloroform imparting blue colour
• C. Chlorine monoxide is evolved when $KClO_3$ is treated with conc. $H_2SO_4$
• D. Chloride ion can be confirmed by chromyl chloride test

Answer 1

Answer: (D)

D

Answer 2

The correct statements regarding halogens are evaluated below:

• A: Incorrect. Br₂ is liquid, I₂ is solid at ordinary temperature.

• B: Incorrect. Br₂ in CHCl₃ gives orange-brown color.

• C: Incorrect. $KClO_3$ with conc. $H_2SO_4$ evolves $ClO_2$, not $Cl_2O$.

• D: Correct. Chromyl chloride test is a specific test for chloride ions, forming volatile orange-red $CrO_2Cl_2$ vapors.