Short Answer TypeExplain the following:
(i) Boron has high melting and boiling points.
(ii) Aluminium is a good reducing agent.
(i) Due to small atomic size boron forms strong covalent bonds with the neighbouring atoms. Thus boron atoms are closely packed in its solid, thus boron has high melting and boiling points.
(ii) Because of its high affinity for oxygen, it reduces many metallic oxides to metals.
For example.
Long Answer TypeDiscuss the characteristics of Group-13 elements in terms of metallic character and their tendency to exhibit inert pair effect.
Short Answer TypeBoron chloride exists a monomer while in the same group anhydrous, AlCl3 exists as a dimer?
White fumes appear around the bottle of anhydrous aluminium chloride.
Or
Why aluminium chloride in air?
Long Answer TypeSuggest a reason why the B - F bond lengths in BF3 (130 pm) and 
(143 pm) differ?
Or
Why B - F bond length in BF3 is smaller than the expected value?
Short Answer Type
Switch
. Assign the hybridization of boron in these species ?
