(a) what happens when
(i) Chlorine gas is passed though a hot concentrated solution of NaOH?
(ii) sulphure dioxide gas is passed through an aqueses solution of Fe (III) salt?
(b) Answer the following :
(i) what is the basicity of `H_(3) PO_(3)` and why?.
(ii) why does fluorine not pay the role of a central atom in interhalogen compounds ?
(iii) Why do noble gases have very low boiling points ?

Explanation

### Step-by-Step Solution

#### Part (a)

**(i) What happens when chlorine gas is passed through a hot concentrated solution of NaOH?**

When chlorine gas (Cl₂) is passed through a hot concentrated solution of sodium hydroxide (NaOH), a chemical reaction occurs that produces sodium chlorate (NaClO₃), sodium chloride (NaCl), and water (H₂O). The balanced chemical equation for this reaction is:

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