Question

Point out the false statements in the following:
(a) Lead shows allotropy.
(ii) Carbon shows `sp^(3)` hybridisation in both diamond and graphite.
(c) Tin exists in three allotropic forms. These are white. Grey and brittle.
(d) +2 oxidation state is more common in tin than in lead.
(f) Carbon has the maximum tendency to catenate among the elements of group-14.
(f) Both `CO_(2)` and `SiO_(2)` are gaseous at room temperature
(g) Elemental silicon does not have graphites-like structure.
(h) Stannous chloride can act as an oxidising agent inreactions.
(i) ` C Cl_(4)` can act as Lewis acid.

Answer 1

(a) Lead is the only element in group-14 which does nto show any allotorpy.
(b) Carbon shows `sp^(3)` hybridisation only in diamond. In graphite, the carbon atom sare `sp^(2)` hybridised.
(d) +2 oxidation state is more common in lead than in tin due to greater inert pair effect.
(f) only `CO_(2)` is a gas while `SiO_(2)` is a solid.
(h) Stannous chloride `(SnCl_(2))` can act as reduc ing agent in its reactions because the element tin (Sn) can increase its oxidation number from +2 to +4 but cannot decrease it
(i) `C Cl_(4)` cannot act as Lewis acid since carbon atom has no vacant orbitals to accept electrons.