(a) (i) Give reason why carbon can neither form C4+ cations nor C4- anions but form covalent compounds. (ii)…
(a) (i) Give reason why carbon can neither form C4+ cations nor C4- anions but form covalent compounds.
(ii) What is homologous series of carbon compound ? Write the molecular formula of any two consecutive members of homologous series of aldehydes.
(iii) Draw the structure of the molecule of cyclohexane (C6H12).
Solution
(a)
(i)
Carbon cannot form C4+ cations because removal of 4 electrons from a carbon atom would require a large amount of energy and it cannot form C4- anion because it would be difficult for the nucleus with 6 protons to hold 10 electrons.
Thus it shares electrons to form covalent compounds.
(ii)
A series of compounds in which the same functional group substitutes for hydrogen in a carbon chain / series of compounds having same functional group and similar chemical properties.
CH3CHO, C2H5CHO (any other consecutive members)
(iii) Structure of cyclohexane (C6H12)
[Diagram: cyclohexane ring structure showing C and H atoms]