$\begin{aligned} & \mathrm{SF}_4 \xrightarrow{\text { Hydrolysis }} X+Y \\ & X+\mathrm{H}_2 \mathrm{~S} \longrightarrow Z\end{aligned}$ Here, $Z$ is

• A

  $\mathrm{SO}_3$
• Correct answer
  B

  colloidal sulphur
• C

  gaseous sulphur
• D

  solid sulphur

Solution

Thus, $Z=$ colloidal sulphur

Hence, the correct answer is option: 'B'.