Which member of Group 13 elements does not exhibit the Group valency in its compound?
boron
gallium
thallium
aluminium
Which of the following is used in high temperature thermometry?
Na
Ga
Ti
Hg
Which of the following represents the correct outer electronic configuration of the Group 13 elements?
ns2 np1
ns2 np3
ns2 nd1
ns2 np6
Boron and aluminium are
s-block elements
p-block elements
d-block elements
f-block elements
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+
Which of the following is true for an element R present in Group 13 of the Periodic Table?
it forms RX2
it forms R2O3
it has oxidation state of +4
it is a gas at room temperature
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
The first ionisation potential of Group 13 elements is lower than that of Group 2 elements, because?
electrons in Group 2 elements are bonded weakly
electrons in Group 13 elements are bonded tightly
Group 13 elements have 3 electrons in valence shell
Group 13 elements have 5 electrons in valence shell
