Q14.
(a) Giant covalent / giant molecular / macromolecular
Not giant alone.
Not covalent alone.
1
(b) Shared pair of electrons / one electron from each C atom
1
(c) No delocalised / free / mobile electrons
Allow all (outer) electrons involved in (covalent) bonds.
Ignore ions.
1
(d) CH
Allow HC
C and H must be capital letters.
1
[4]