Previous Year JEE Questions
Periodic Classification
s-block
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Outermost electronic configuration of a group 13 element, E, is 4s2 4p1 .
The electronic configuration of an element of p-block period-five placed
diagonally to element, E is
JEE MAIN July 2021
1
[Xe]5d106s26p2
2
[Ar]3d104s24p2
3
[Kr]3d104s24p2
4
[Kr]4d105s25p2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Outermost electronic configuration of a group 13 element, E, is 4s2 4p1 .
The electronic configuration of an element of p-block period-five placed
diagonally to element, E is
JEE MAIN July 2021
1
[Xe]5d106s26p2
2
[Ar]3d104s24p2
3
[Kr]3d104s24p2
4
[Kr]4d105s25p2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The absolute value of the electron gain enthalpy of halogen satisfies
JEE MAIN Mar 2021
1
I > Br > Cl > F
2
Cl > Br > F > I
3
Cl > F > Br > I
4
F > Cl > Br > I
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The absolute value of the electron gain enthalpy of halogen satisfies
JEE MAIN Mar 2021
1
I > Br > Cl > F
2
Cl > Br > F > I
3
Cl > F > Br > I
4
F > Cl > Br > I
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ionic radii of K+, Na+, Al3+ and Mg2+ are in the order
JEE MAIN July 2021
1
Al3+ < Mg2+ < Na+ < K+
2
Al3+ < Mg2+ < K+ < Na+
3
K+ < Al3+ < Mg2+ < Na+
4
Na+ < K+ < Mg2+ < Al3+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ionic radii of K+, Na+, Al3+ and Mg2+ are in the order
JEE MAIN July 2021
1
Al3+ < Mg2+ < Na+ < K+
2
Al3+ < Mg2+ < K+ < Na+
3
K+ < Al3+ < Mg2+ < Na+
4
Na+ < K+ < Mg2+ < Al3+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The set of elements that differ in mutual relationship from those of
the other sets is:
JEE MAIN Mar 2021
1
Li - Mg
2
B - Si
3
Be - Al
4
Li - Na
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The set of elements that differ in mutual relationship from those of
the other sets is:
JEE MAIN Mar 2021
1
Li - Mg
2
B - Si
3
Be - Al
4
Li - Na
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ionic radius of Na+ ions is 1.02 Å. The ionic radii (in Å) of Mg2+ and
Al3+, respectively are:
JEE MAIN Mar 2021
1
1.05 and 0.99
2
0.72 and 0.54
3
0.85 and 0.99
4
0.68 and 0.72
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ionic radius of Na+ ions is 1.02 Å. The ionic radii (in Å) of Mg2+ and
Al3+, respectively are:
JEE MAIN Mar 2021
1
1.05 and 0.99
2
0.72 and 0.54
3
0.85 and 0.99
4
0.68 and 0.72
The ionic radii order is
Na+ > Mg2+ > Al3+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Consider the elements Mg. Al, S, P and Si, the correct increasing order of
their first ionization enthalpy is :
JEE MAIN Feb 2021
1
Mg < Al < Si < S < P
2
Al < Mg < Si < S < P
3
Mg < Al < Si < P < S
4
Al < Mg < S < Si < P
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Consider the elements Mg. Al, S, P and Si, the correct increasing order of
their first ionization enthalpy is :
JEE MAIN Feb 2021
1
Mg < Al < Si < S < P
2
Al < Mg < Si < S < P
3
Mg < Al < Si < P < S
4
Al < Mg < S < Si < P
In general from left to right in a period,
ionisation enthalpy increases due to
effective nuclear charge increases. but
due to extra stability of half filled and
full filled electronic configuration,
required ionisation enthalpy is more
from neighbouring elements. i.e. first
ionisation enthalpy order is
Al < Mg < Si < S < P
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The correct order of electron gain enthalpy is
JEE MAIN Feb 2021
1
S > Se > Te > O
2
Te > Se > S > O
3
O > S > Se > Te
4
S > O > Se > Te
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The correct order of electron gain enthalpy is
JEE MAIN Feb 2021
1
S > Se > Te > O
2
Te > Se > S > O
3
O > S > Se > Te
4
S > O > Se > Te
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
In general, the property (magnitude only) that shows an opposite trend
in comparison to other properties across a period is:
JEE MAIN 2020
1
Ionization enthalpy
2
Electronegativity
3
Electron gain enthalpy
4
Atomic Radius
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
In general, the property (magnitude only) that shows an opposite trend
in comparison to other properties across a period is:
JEE MAIN 2020
1
Ionization enthalpy
2
Electronegativity
3
Electron gain enthalpy
4
Atomic Radius
On moving left to right along
a period in the periodic table,
atomic radius decreases
while electronegativity,
electron gain enthalpy and
ionisation enthalpy
increases, along a period.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The correct order of the ionic radii of O2- , N3- , F- , Mg2+ , Na+ and Al3+ is:
JEE MAIN 2020
1
Al3+ < Mg2+ < Na+ < F- < O2- < N3-
2
Al3+ < Na+ < Mg2+ < O2- < F- < N3-
3
N3- < F- < O2- < Mg2+ < Na+ < Al3+
4
N3- < O2- < F- <Na+ < Mg2+ < Al3+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The correct order of the ionic radii of O2- , N3- , F- , Mg2+ , Na+ and Al3+ is:
JEE MAIN 2020
1
Al3+ < Mg2+ < Na+ < F- < O2- < N3-
2
Al3+ < Na+ < Mg2+ < O2- < F- < N3-
3
N3- < F- < O2- < Mg2+ < Na+ < Al3+
4
N3- < O2- < F- <Na+ < Mg2+ < Al3+
For isoelectronic
species, as the no. of
protons increases,size
of ions decreases. Thus
order (1) is correct.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The element having greatest difference between its first and
second ionisation energy, is
JEE MAIN 2019
1
Ca
2
Sc
3
Ba
4
K
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The element having greatest difference between its first and
second ionisation energy, is
JEE MAIN 2019
1
2
Ca
Sc
3
Ba
4
K
K(19) = 1s2 2s2 2p6 3s2 3p6 4s1
After removal of one electron, the second
electron we have to remove from another
shell which has an octet configuration,
hence there is a large difference between
first and second ionization energies.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
In general, the properties that decrease and increase down a
group in the periodic table, respectively are
JEE MAIN 2019
1
E.N and atomic radius
2
E.N and electron gain enthalpy
3
Electron gain enthalpy and E.N
4
Atomic radius and E.N
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
In general, the properties that decrease and increase down a
group in the periodic table, respectively are
JEE MAIN 2019
1
E.N and atomic radius
2
E.N and electron gain enthalpy
3
Electron gain enthalpy and E.N
4
Atomic radius and E.N
Electronegativity
decreases and atomic
radius increases down a
group in the periodic table.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ionic radii (in Å) of N3- ,O2- and F- respectively are
JEE MAIN 2019
1
1.36, 1.40 and 1.71
2
1.36, 1.71 and 1.40
3
1.71, 1.40 and 1.36
4
1.71, 1.36 and 1.4
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ionic radii (in Å) of N3- ,O2- and F- respectively are
JEE MAIN 2019
1
1.36, 1.40 and 1.71
2
1.36, 1.71 and 1.40
3
1.71, 1.40 and 1.36
4
1.71, 1.36 and 1.4
All the three species have each 10
electrons, hence they are isoelectronic
species.
It is considered that, in case of
isoelectronic species as the negative
charge increases, ionic radii increases
and therefore the value of ionic radii
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Which of the following represents the correct order of increasing first
ionisation enthalpy for Ca, Ba, S, Se and Ar?
JEE MAIN 2013
1
Ca < S < Ba < Se < Ar
2
S < Se < Ca < Ba < Ar
3
Ba < Ca < Se < S < Ar
4
Ca < Ba < S < Se < Ar
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Which of the following represents the correct order of increasing first
ionisation enthalpy for Ca, Ba, S, Se and Ar?
JEE MAIN 2013
1
Ca < S < Ba < Se < Ar
2
S < Se < Ca < Ba < Ar
3
Ba < Ca < Se < S < Ar
4
Ca < Ba < S < Se < Ar
Ionisation energy increases along a
period from left to right and decreases
down a group.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The set representing the correct order of first ionisation potential is
AIEEE 2001
1
K > Na > Li
2
Be > Mg >Ca
3
B >C > N
4
Ge > Si >C
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The set representing the correct order of first ionisation potential is
AIEEE 2001
1
2
K > Na > Li
Be > Mg >Ca
Size increases as we move down the group.
Therefore, the outer electrons experience
less attraction due to increase in distance,
i.e., the effective nuclear charge
experienced is less. Less the effective
3
B >C > N
nuclear charge less the I.P. Therefore, I.P of
Be>Mg>Ca.
4
Ge > Si >C
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The correct order of radii is
AIEEE 2000
1
N < Be < B
2
F- < O2- < N3-
3
Na < Li < K
4
Fe3+ < Fe2+ < Fe4+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The correct order of radii is
AIEEE 2000
1
N < Be < B
2
F- < O2- < N3-
3
Na < Li < K
4
Fe3+ < Fe2+ < Fe4+
Among isoelectronic species,
greater the negative charge,
greater the ionic size, hence
F- < O2- < N3-
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Amongst the following elements (whose electronic configurations are
given below), the one having the highest ionisation energy is
AIEEE 1990
1
[Ne]3s23p1
2
[Ne]3s23p3
3
[Ne]3s23p2
4
[Ar]3d104s24p3
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Amongst the following elements (whose electronic configurations are
given below), the one having the highest ionisation energy is
AIEEE 1990
1
[Ne]3s23p1
2
[Ne]3s23p3
3
[Ne]3s23p2
4
[Ar]3d104s24p3
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The electronegativity of the following elements increases in the
order
AIEEE 1987
1
C, N, Si, P
2
N, Si, C, P
3
Si, P, C, N
4
P, Si, N, C
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The electronegativity of the following elements increases in the
order
AIEEE 1987
1
C, N, Si, P
2
N, Si, C, P
3
Si, P, C, N
4
P, Si, N, C
Electronegativity increases from left to right
in a period and decreases from top to
bottom in a group. Variation is more rapid in
group than in a period, hence the desired
order is
Electronegativity : Si < P < C < N
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The hydration energy of Mg2+ is larger than that of
AIEEE 1984
1
Al3+
2
Na+
3
Be2+
4
Mg2+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The hydration energy of Mg2+ is larger than that of
AIEEE 1984
1
Al
Hydration energy depends on charge of ion and
ionic radius. Higher the charge, greater the
hydration energy.
2
Na+
On the other hand, smaller the size, greater the
hydration energy.
3+
2+
3
Be
4
Mg2+
Charge is considered first for comparison.
Hence, Mg2+ has higher hydration energy than
Na + .
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Which is the correct order of second ionisation potential of C, N, O
and F in the following?
AIEEE 1981
1
O>N>F>C
2
O>F>N>C
3
F>O>N>C
4
C>N>O>F
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Which is the correct order of second ionisation potential of C, N, O
and F in the following?
AIEEE 1981
1
O>N>F>C
2
O>F>N>C
3
F>O>N>C
4
C>N>O>F
wassimbhatt
Previous Year JEE Questions
Chemical Bonding
s-block
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The hybridisation of the atomic orbitals of nitrogen in
NO2– , NO2+ and NH4+ respectively are :
JEE Main July 2021
1
sp2 , sp and sp3
2
sp, sp2 and sp3
3
sp3 , sp and sp2
4
sp3 , sp2 and sp
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The hybridisation of the atomic orbitals of nitrogen in
NO2– , NO2+ and NH4+ respectively are :
JEE Main July 2021
1
sp2 , sp and sp3
2
sp, sp2 and sp3
3
sp3 , sp and sp2
4
sp3 , sp2 and sp
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The Azimuthal quantum number for the valence electrons in
Ga+ ion is: (Atomic number of Ga = 31)
JEE Main July 2021
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The Azimuthal quantum number for the valence electrons in
Ga+ ion is: (Atomic number of Ga = 31)
JEE Main July 2021
Answer = 0
Ga = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p1
Ga+= 1s2 2s2 2p6 3s2 3p6 3d10 4s2
Thus ‘l’ for valence shell e- = 0
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The number of lone pairs of electrons on the central ‘I’ atom in
I3- is
JEE Main July 2021
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The number of lone pairs of electrons on the central ‘I’ atom in
I3- is
JEE Main July 2021
Answer = 3
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Match List-I with List-II
1
a-i, b-iv, c-iii, d-ii
2
a-i, b-iii, c-ii, d-iv
3
a-iii, b-iv, c-ii, d-i
JEE Main July 2021
List I (Species)
List II (Hybridisation)
a. SF4
i. sp3d2
b. IF5
ii. d2sp3
c. NO2+
iii. sp3d
d. NH4+
iv. sp3
v. sp
4
a-iii, b-i, c-iv, d-iv
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Match List-I with List-II
1
a-i, b-iv, c-iii, d-ii
2
a-i, b-iii, c-ii, d-iv
3
a-iii, b-iv, c-ii, d-i
JEE Main July 2021
List I (Species)
List II (Hybridisation)
a. SF4
i. sp3d2
b. IF5
ii. d2sp3
c. NO2+
iii. sp3d
d. NH4+
iv. sp3
v. sp
4
a-iii, b-i, c-v, d-iv
wassimbhatt
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Identify the species having one 𝛑-bond and maximum no. of
canonical forms from the following
JEE Main July 2021
1
CO32-
2
SO3
3
O2
4
SO2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Identify the species having one 𝛑-bond and maximum no. of
canonical forms from the following
JEE Main July 2021
1
CO32-
2
SO3
3
O2
4
SO2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
In the following the correct bond order sequence is:
JEE Main July 2021
1
O2 > O2- > O22- > O2+
2
O22- > O2 > O2- > O2
3
O2+ > O2 > O2- > O22-
4
O2+ > O2- > O22- > O2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
In the following the correct bond order sequence is:
JEE Main July 2021
1
O2 > O2- > O22- > O2+
O2
2
O22-
O2
+
3
O2+
O2
-
4
> O2 >
O2-
> O2 >
O2-
> O2
>
O22-
O2+ > O2- > O22- > O2
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)1 = (𝜋* 2py)1
O22-
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)1 = (𝜋* 2py)0
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)2 = (𝜋* 2py)1
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)2 = (𝜋* 2py)2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
A central atom in a molecule has 2 lone pairs and forms three single
bonds. The shape of this molecule
JEE Main Mar 2021
1
see-saw
2
planar triangular
3
T-shaped
4
trigonal pyramidal
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
A central atom in a molecule has 2 lone pairs and forms three single
bonds. The shape of this molecule
JEE Main Mar 2021
1
see-saw
2
planar triangular
3
T-shaped
4
trigonal pyramidal
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Amongst the following, the linear species is
JEE Main Mar 2021
1
NO2
2
Cl2O
3
O3
4
N3wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Amongst the following, the linear species is
JEE Main Mar 2021
1
NO2
2
Cl2O
3
O3
4
N3wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Among the following species, the diamagnetic molecule is
JEE Main 2018, 19
1
CO
2
B2
3
NO
4
O2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Among the following species, the diamagnetic molecule is
JEE Main 2018, 19
1
2
3
4
CO
B2
NO
O2
CO
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝜋 2px)2 =
(𝜋 2py)2 < (𝛔 2pz)2
B2
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝜋 2px)1 =
(𝜋 2py)1
NO
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)1 = (𝜋* 2py)0
O2
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)1 = (𝜋* 2py)1
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Stability of the species Li2 , Li2- and Li2+ increases in the order of
JEE Main 2013
1
Li2 < Li2+ < Li2-
2
Li2- < Li2+ < Li2
3
Li2 < Li2- < Li2+
4
Li2- < Li2 < Li2+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Stability of the species Li2 , Li2- and Li2+ increases in the order of
JEE Main 2013
1
Li2 < Li2+ < Li2-
2
Li2- < Li2+ < Li2
3
Li2 < Li2- < Li2+
4
Li2- < Li2 < Li2+
Stability order is (2) because Li2- has more
number of electrons in antibonding orbitals
which destabilizes the species.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The number of species below that have two lone pairs of electrons in their
central atom is ____
(Round off to the Nearest integer)
JEE Main Mar 2021
SF4 , BF4- , ClF3 , AsF3 , PCl5 , BrF5 , XeF4 , SF6
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The number of species below that have two lone pairs of electrons in their
central atom is ____
(Round off to the Nearest integer)
JEE Main Mar 2021
SF4 , BF4- , ClF3 , AsF3 , PCl5 , BrF5 , XeF4 , SF6
Answer: 2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Give the order of dipole moment of the following compounds.
(i)
NH3
NF3
(ii)
(iii)
HF
HCl
HBr
HI
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Give the order of dipole moment of the following compounds.
(i)
NH3
(ii)
(iii)
NF3
>
>
HF
>
HCl
>
HBr
>
HI
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Give the order of dipole moment of the following compounds.
(i)
CH3F
(ii)
NH3
CH3Cl
CH3Br
CH3I
PH3
(iii)
H2O
NH3
(iv)
CHF3
CHCl3
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Give the order of dipole moment of the following compounds.
2
(i)
CH3F
(ii)
NH3 >
1
CH3Cl
3
CH3Br
4
CH3I
PH3
(iii)
H2O >
NH3
(iv)
CHF3 >
CHCl3
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Give the order of dipole moment of the following compounds.
(i)
(ii)
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Give the order of dipole moment of the following compounds.
(i)
(ii)
<
<
<
<
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The isoelectronic set of ions is
JEE Main 2019
1
F- , Li+ , Na+ and Mg2+
2
N3- , Li+ , Mg2+ and O2-
3
Li+, Na+, O2- and F-
4
N3-, O2- , F- and Na+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The isoelectronic set of ions is
JEE Main 2019
1
F- , Li+ , Na+ and Mg2+
2
N3- , Li+ , Mg2+ and O2-
3
Li+, Na+, O2- and F-
4
N3-, O2- , F- and Na+
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The molecule which has zero dipole moment is
AIEEE 1989
1
CH2Cl2
2
BF3
3
NF3
4
ClO2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The molecule which has zero dipole moment is
AIEEE 1989
1
CH2Cl2
2
BF3
3
NF3
4
ClO2
BF3 has triangular planar arrangement.
Three identical vectors acting in outward
direction at equal angles in a plane
cancel each other giving zero resultant,
hence non-polar.
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ion that has sp3d2 hybridisation for the central atom, is
JEE Main 2019
1
[ICl2]-
2
[BrF2]-
3
[ICl4]-
4
[IF6]wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The ion that has sp3d2 hybridisation for the central atom, is
JEE Main 2019
1
[ICl2]-
2
[BrF2]-
3
[ICl4]-
4
[IF6]wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Total number of lone pair of electron in I3- ion is
JEE Main 2018
1
3
2
6
3
9
4
12
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Total number of lone pair of electron in I3- ion is
JEE Main 2018
1
3
2
6
3
9
4
12
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The species having pyramidal shape is
AIEEE 2010
1
SO3
2
BrF3
3
SiO32-
4
OSF2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
The species having pyramidal shape is
AIEEE 2010
1
SO3
2
BrF3
3
SiO32-
SO3 is planar (S is sp2 hybridised),
BrF3 is T-shaped and SiO3 2- is planar
(Si is sp2 hybridised).
4
OSF2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
According to molecular orbital theory which of the following statement
about the magnetic character and bond order is correct regarding O2+
1
Paramagnetic & B.O < O2
2
Paramagnetic & B.O > O2
3
Diamagnetic & B.O < O2
4
Diamagnetic & B.O > O2
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
According to molecular orbital theory which of the following statement
about the magnetic character and bond order is correct regarding O2+
1
Paramagnetic & B.O < O2
O2
2
Paramagnetic & B.O > O2
O2
3
Diamagnetic & B.O < O2
4
Diamagnetic & B.O > O2
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)1 = (𝜋* 2py)1
+
(𝛔 1s)2 < (𝛔* 1s)2 < (𝛔 2s)2 < (𝛔* 2s)2 < (𝛔 2pz)2
< (𝜋 2px)2 = (𝜋 2py)2 < (𝜋* 2px)1 = (𝜋* 2py)0
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
According to molecular orbital theory, which of the following will
not be a viable molecule?
JEE MAIN 2018
1
He22+
2
He2+
3
H2-
4
H22-
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
According to molecular orbital theory, which of the following will
not be a viable molecule?
JEE MAIN 2018
1
He22+
2
He2+
3
H2-
4
H22-
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Which of the following contains maximum number of lone pairs on the
central atom?
AIEEE 2005
1
ClO3-
2
XeF4
3
SF4
4
I3wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Which of the following contains maximum number of lone pairs on the
central atom?
AIEEE 2005
1
ClO3-
2
XeF4
3
SF4
4
I3-
3 l.p
1 l.p
1 l.p
2 l.p
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Number of lone pair(s) in XeOF4 is/are
1
0
2
1
3
2
4
3
AIEEE 2004
wassimbhatt
TOP 50 QUESTIONS: PERIODIC CLASSIFICATION & CHEMICAL BONDING
Number of lone pair(s) in XeOF4 is/are
1
0
2
1
3
2
4
3
AIEEE 2004
wassimbhatt
15
5
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