p-Block Elements-I 2 Question 25
25. $\mathrm{AlF}{3}$ is insoluble in anhydrous $\mathrm{HF}$ but when little $\mathrm{KF}$ is added to the compound it becomes soluble. On addition of $\mathrm{BF}{3}$, $\mathrm{AlF}_{3}$ is precipitated. Write the balanced chemical equations.
(2004, 2M)
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Solution:
- Phosgene gas is obtained by treatment of $\mathrm{CCl}_{4}$ with superheated steam :
$$ \mathrm{CCl}{4}+\mathrm{H}{2} \mathrm{O} \text { (vapour) } \longrightarrow \mathrm{COCl}_{2}+2 \mathrm{HCl} $$
