Complete the following by choosing the correct answer from the bracket.

(a) Alkenes differ from alkanes due to the presence of …………… (double/single) bonds.

(b) Down the group, ionisation potential …………… (increases /decreases).

(c) By dissolving aluminium oxide in cryolite a …………… (conducting/non-conducting) solution is produced.

(d) The catalyst used for conversion of ethene to ethane is commonly …………… (iron/nickel).

(e) The gas released when sodium carbonate is added to a solution of sulphur dioxide is …………… (CO₂/SO₃)

Identify the following.

(a) The acid that is present in vinegar.

(b) A metal which catches fire, when kept in open air.

(c) A sweet smelling compound formed when ethanol reacts with ethanoic acid.

(d) A catalyst used in Haber's process.

(e) An organic compound used for ripening and preservation of fruits.

Draw the electron dot structure for the following.

(a) NH₄⁺

(b) CaO

Distinguish between the following as directed.

(a) Sodium carbonate and sodium sulphate using H₂SO₄.

(b) Lead (II) oxide and zinc oxide using H₂SO₄.