Question

After using CCl4 rooms should be well ventilated why

Answer 1

So that it cools down and able to form a layer which protects the wall. Therefore, it should be ventilated properly.

Answer 2

Explanation:

the space is thoroughly ventilated to sweep out the poisonous carbonyl chloride or phosgene gas that may have formed by the reaction of ccl4 and water vapour at high temperature

ccl4+h20----cocl2+hcl