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 hydroxide is most acidic in nature?
B(OH)3
Al(OH)3
In(OH)3
Ti(OH)
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 a covalent compound?
AlF3
Al2O3
AlCl3
Al2(SO4)3
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
Antidote for carbon monoxide poisoning is
carbogen
carborundum
carbon dioxide
carbonyl chloride
which of the following is an electron deficient molecule?
B2H6
C2H6
PH3
SiH4
Which of the following element is most electropositive?
B
Al
Ga
In
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
Which of the following is used in high temperature thermometry?
Na
Ti
Hg
