JEE Main Chemistry - Chemical Bonding
Exam Duration: 60 Mins Total Questions : 30
Which of the following is not true for resonance? They have
- (a)
identical bonding
- (b)
identical arrangement of atoms
- (c)
same number of paired electrons
- (d)
structure with nearly the same energy
The number of antibonding electron pairs in O22- molecular ion on the basis of molecular orbital theory :
- (a)
4
- (b)
3
- (c)
2
- (d)
5
Which of the following pairs have the bond order 2.5?
- (a)
F2 and H2
- (b)
O2+ and N2+
- (c)
O2 and N2
- (d)
O2- and O22-
In the compound of the type O=PX3,the phophorus atom exhibits bonding of the type
- (a)
p\(\pi\)-p\(\pi\)
- (b)
d\(\pi\)-d\(\pi\)
- (c)
p\(\pi\)-d\(\pi\)
- (d)
None
Hydrogen bond cannot exist between
- (a)
OH..O
- (b)
NH..O
- (c)
OH..N
- (d)
CH-C
Delocalised molecular orbitals are found in
- (a)
H2
- (b)
HS-
- (c)
CH4
- (d)
CO32-
Which of the following involves sp2 hybridisation?
- (a)
CO2
- (b)
SO2
- (c)
N2O
- (d)
CO
The order of O-O bond length in O2,H2O2,O3 is
- (a)
O2>O3>H2O2
- (b)
O3>H2O2>O2
- (c)
H2O2>O3>O2
- (d)
O2>H2O2>O3
Which of the following pairs contains isostructural species?
- (a)
CH3- and CH3+
- (b)
NH4+ and NH3
- (c)
SO42- and BF4-
- (d)
NH2- and BeF2
Which of the following is not paramagnetic?
- (a)
NO
- (b)
S-2
- (c)
O2-1
- (d)
N2-
Which of the following molecules/ions has triangular pyramidal shape?
- (a)
BF3
- (b)
NO3-
- (c)
H3O+
- (d)
CO32-
Which type of bond is not present in HNO2 molecule :
- (a)
Covalent
- (b)
Co-ordinate
- (c)
Ionic
- (d)
Ionic as well as co-ordinate
The octahedral shape is associated with
- (a)
PF5
- (b)
SF4
- (c)
TeF6
- (d)
CIF3
Which overlap is involved in HCl molecule?
- (a)
s-s overlap
- (b)
p-p overlap
- (c)
s-d overlap
- (d)
s-p overlap
The bond order of a molecule is given by
- (a)
the difference between the number of electrons in bonding and antibonding orbitals
- (b)
total number of electrons in bonding and antibonding orbitals
- (c)
twice the difference between the number of electrons in bonding and antibonding orbitals
- (d)
half the difference between number of electrons in bonding and antibonding orbitals.
Outermost shells of two elements X and Y have two and six electrons respectively.If they combine,expected formula of compound will be
- (a)
XY
- (b)
X2Y
- (c)
X2Y3
- (d)
XY2
When two ice cubes are pressed over each other,they unite to form one cube.Which of the following forces is responsible to hold them together?
- (a)
Hydrogen bond formation
- (b)
van der Waai's forces
- (c)
Covalent attraction
- (d)
Dipole interaction
The geometric form of crystals is the result of orderly arrangement of
- (a)
molecules only
- (b)
ions only
- (c)
atoms only
- (d)
molecules,atoms or ions
The hybridisation of carbons involved in C-C single bond in C=C-CH=CH2 is :
- (a)
sp3-sp2
- (b)
sp3-sp3
- (c)
sp-sp2
- (d)
sp-sp3
In which of the following species in the inter-atomic bond angle 109o28'?
- (a)
NH3;(BF4)-1
- (b)
(NH4)+,BF3
- (c)
NH3,BF4
- (d)
(NH2)-1,BF3
What is the bond angle of H-O-H in ice (answer approx. value)?
- (a)
120o28'
- (b)
109o
- (c)
90o
- (d)
60o
Which of the following is paramagnetic?
- (a)
\({ NO }^{ - }\)
- (b)
\({ O }_{ 2 }^{ 2- }\)
- (c)
\({ CN }^{ - }\)
- (d)
\(CO\)
Which of the following show correct structure of ICl2 ?
- (a)
- (b)
- (c)
- (d)
None of these
Which of the following molecule will be stabilised by loosing one electron from its HOMO?
- (a)
C2
- (b)
N2
- (c)
CN
- (d)
O2
Which of the following requires maximum energy to undergo decomposition?
- (a)
O2
- (b)
C2
- (c)
O2+
- (d)
N2
Which one of the following molecules is expected to exhibit diamagnetic behaviour?
- (a)
C2
- (b)
N2
- (c)
O2
- (d)
S2
In which of the following pairs of molecules / ions both the species are not likely to exist?
- (a)
\({ H }_{ 2 }^{ + },{ He }_{ 2 }^{ 2- }\)
- (b)
\({ H }_{ 2 }^{ - },{ He }_{ 2 }^{ 2- }\)
- (c)
\({ H }_{ 2 }^{ 2+ },{ He }_{ 2 }\)
- (d)
\({ H }_{ 2 }^{ - },{ He }_{ 2 }^{ 2+ }\)
Stability of the species Li2, Li2- and Li2+ increases in the order of
- (a)
\({ Li }_{ 2 }<{ Li }_{ 2 }^{ + }<{ Li }_{ 2 }^{ - }\)
- (b)
\({ Li }_{ 2 }^{ - }<{ Li }_{ 2 }^{ + }<{ Li }_{ 2 }\)
- (c)
\({ Li }_{ 2 }<{ Li }_{ 2 }^{ - }<{ Li }_{ 2 }^{ + }\)
- (d)
\({ Li }_{ 2 }^{ - }<{ Li }_{ 2 }<{ Li }_{ 2 }^{ + }\)
Using MO theory, predict which of the following species has the shortest bond length?
- (a)
\({ O }_{ 2 }^{ 2+ }\)
- (b)
\({ O }_{ 2 }^{ + }\)
- (c)
\({ O }_{ 2 }^{ - }\)
- (d)
\({ O }_{ 2 }^{ 2- }\)