CBSE
Multiple Choice QuestionsThe incorrect configuration is
K = [Ar] 4s1
Cr= [Ar] 3d5 ,4s1
Cr= [Ar] 3d4 , 4s1
Cu= [Ar]3d10 ,4s1
Which of the following ions has the highest value of ionic radius:
O2-
F-
Li+
B3+
Which of the following ions, has smallest size?
Ca2+
Cl-
S2-
K+
Yellow phosphorus is kept in
water
kerosene
ether
alcohol
The decreasing nucleophilicity of the following is:
I. CH3S- II. CH3O-
III. -OH IV. EtO-
II > III > 1V > I
III > IV > I > II
IV > III > I > II
II < I < IV < III
Which will have maximum ionization energy?
Na
Mg
K
Bi
Lowest MP and BP is of
Ar
Xe
He
Ne
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified as
Zn
Fe
Pb
Hg
Which of the following electronic configuration represents noble gas?
ns2np6
ns2np5
ns2np4
ns2np3
The correct order of ionisation energy of C, N, O, F is :
F < 0 < N < C
F < N < C < 0
C < N < 0 < F
C < 0 < N < F
