Mention the missing information in In the following chemical reactions:

(i) + H₂O(l) H₂SO₄(aq)

(ii). S(s) + SO₂(g)

(iii). + H₂O(l) H₂CO₃(aq)

(iv). S(s) + H₂(g)

(v). 2Na(s) + 2NaOH(aq) + H₂(g)

(vi). Zn(s) + H₂O(g) → ZnO(s) +

(vii). CH₄(g) + H₂O(g) CO(g) + 3H₂(g)

(viii). CuO(s) + Cu(s) + H₂O(g)

(ix). H₂(g) + 2KH(s)

(x). MgSO₄(aq) + Mg(OH)₂(s) + (NH₄)₂SO₄(aq)

(xi). SO₂(g) + 2H₂S(g) 3S(s) + 2H₂O(g)

(xii). 2SO₂(g) 2SO₃(g)

(xiii). CuSO₄5H₂O(s) + con. H₂SO₄(l)

(i) SO₃(g) + H₂O(l) H₂SO₄(aq)

Sulphur trioxide gas reacts with water to form sulphuric acid with very corrosive fumes.

(ii) S(s) + O₂(g) → SO₂(g)

Sulphur reacts with dioxygen gas to form sulphur dioxide (non-metallic oxide). This oxide is acidic in nature.

(iii) CO₂ + H₂O(l) H₂CO₃ (aq)

Carbon dioxide reacts with water to form carbonic acid (H₂CO₃). This means carbon dioxide is an acidic oxide i.e., an oxide which is acidic in nature.

(iv) S(s) + H₂(g) → H₂S (g)

Sulphur (non-metallic element) reacts with dihydrogen gas to form hydrogen sulphide that is a stable hydride compound.

(v) 2Na(s) + 2H₂O (l) → 2NaOH(aq) + H₂(g)

When active metal like Na reacts with water, it produces sodium hydroxide and liberates dihydrogen gas.

(vi) Zn(s) + H₂O(g) → ZnO(s) + H₂(g)

Less active metal like Zn reacts with water vapour to form zinc oxide and dihydrogen gas.

(vii)

In this process, methane mixed with water over nickel catalyst to form a mixture of carbon monoxide and dihydrogen gas.

This mixture is called water gas.

(viii) CuO(s) + H₂(g) → Cu(s) + H₂O(g)

Dihydrogen gas is a good reducing agent. It reduces easily the metallic oxides.

(ix) H₂(g) + 2K(s) → 2KH(s)

When dihydrogen gas reacts with metal, it forms the metallic hydride of that element.

(x) MgSO₄(aq) + NH₄OH (aq) → Mg(OH)₂(s) + (NH₄)₂SO₄(aq)

Ammonium hydroxide (NH₄OH) forms magnesium hydroxide (Mg(OH)₂)

(xi).

SO₂ reacts with H₂S in the presence of Fe₂O₃ catalyst to form

sulphur. It is one of the methods for the extraction of sulphur.

(xii).

On reaction of sulphur dioxide gas with dioxygen gas in the presence of vanadium catalyst (V₂O₅), sulphur trioxide gas is formed.

(xiii) CuSO₄5H₂O(s) + con. H₂SO₄(l) → CuSO₄

Addition of sulphuric acid to copper sulphate, the water is removed. Because sulphuric acid is a dehydrating agent. It removes all the water present in the substance.