Give a detailed account of the interhalogen, compounds with special reference to the: compounds involving iodine. Draw their structures.

Explain the structure of inter halogen compounds

Mention the uses of helium.

Give a detailed account on allotropes of sulphur.

Why is dioxygen a gas but sulphur a solid?

Complete the following reactions
(i) KCIO₃\(\longrightarrow \)?
(ii) ZnS + O₂\(\longrightarrow \) ?
(iii) Al₂O₃ + NaOH + H₂O\(\longrightarrow \) ?
(iv) NaOH + SO₂\(\longrightarrow \) ?
(v) KCI+ H₂SO₄ \(\longrightarrow \) ?

An amorphous solid (A) burns in air to form a gas (B) which turns lime water milky. The gas is also produced as a byproduct during roasting of sulphide ore. This gas decolourises acidified aqueous KMnO₄ solution and reduces Fe³⁺ to Fe²⁺. Identify the solid 'A' and the gas 'B' and write the reactions involved.

Give reason for the following :
(i) N₂O₅ is more acidic than N₂O₃
(ii) Thermal stability decreases from H₂O to H₂Te.
(iii) Fluoride ion has higher hydration enthalpy than chloride ion.

Account for the following:
(i) Reducing character decreases from SO₂ to TeO₂.
(ii) Xenon forms compounds with fluorine and oxygen only.

Complete the following equations:
a. 4NaCI + MnO₂ + 4H₂SO₄ \(\longrightarrow \)?
b. 6XeF₄ + 12H₂O\(\longrightarrow \)  ?

Explain the oxidising and reducing property of SO₂·

How is sulphuric acid manufacture by contact process?

Explain the oxidising property of sulphuric acid.

How does sulphuric acid react with metals at various conditions.

How is chlorine manufactured by the electrolysis of brine.