Boron behaves as a
metal
metalloid
non-metal
transition metal
The outermost ground state electronic configuration of Group 14 element is
ns2 npx1 npy1 npz0
ns2 npx2 npy1 npz0
ns1 npx1 npy1 npz1
ns1 npx2 npy1 npz0
Which of the following represents the correct outer electronic configuration of the Group 13 elements?
ns2 np1
ns2 np3
ns2 nd1
ns2 np6
Which of the following is a covalent compound?
AlF3
Al2O3
AlCl3
Al2(SO4)3
Boron and aluminium are
s-block elements
p-block elements
d-block elements
f-block elements
Which of the following hydroxide is most acidic in nature?
B(OH)3
Al(OH)3
In(OH)3
Ti(OH)
Which of the following statement is correct about Group 13 elements?
they form only compounds
they form only covalent compounds
they form only co-ordinate compounds
they form both ionic and covalent compounds
Which member of Group 13 elements does not exhibit the Group valency in its compound?
boron
gallium
thallium
aluminium
Among the following pair of ions, the lower oxidation state in aqueous solution is more stable than the other, in
TI+ and TI3+
Cu+ and Cu2+
Cr2+ and Cr3+
V2+ and VO2+
