WorksheetsCHEMICAL BONDING AND MOLECULAR STRUCTURE
Total questions: 20
Worksheet time: 20mins
Which of the following molecules is not an exception to octet rule?
BF3
PF5
CO2
IF7
For which of the follwoing hybridisation the bond angle is maximum?
Sp2
Sp
Sp3
dSp2
Which of the following molecule is not polar?
NH3
NF3
BF3
CHCl3
PCl5 molecule has the follwoing geometry
Trigonal bipyramidal
Octahedral
Square Planar
Pyramidal
In which of the following species is the underlined carbon having Sp3 hybridisation?
CH3COOH
CH3CH2OH
CH3COCH3
CH2=CHCH3
Which one of the following statements is not correct for sigma and pi bonds between two carbon atoms?
Sigma bond is stronger than pi bond
Bond energies of sigma and pi bonds are of the order of 264 kJ /mol
Free rotation of atoms around a sigma bond is allowed but not in case of a pi bond
Sigma bond is formed from hybridised orbital and pi bond is formed from unhybridised orbital.
Which among the following is diamagnetic?
N2
O2
N22-
O2-
Which of the following statement is correct about CO32- ?
The hybridisation of central atom is Sp3
Its canonical structure has one C--O single bond and two C=O double bonds
All C--O bond lengths bond lengths are equal
Canonical structures are less stable
The types of hybrid orbitals of nitrogen in NO2+,NO3- and NH4+ respectively are expected to be
Sp, Sp3, Sp2
Sp, Sp2, Sp3
Sp3, Sp ,sp2
Sp2,sp3,Sp
The correct decreasing order of the boiling points of H2O and NH3 is:
H2O > NH3
NH3 > H2O
Which of the following molecule is T shaped?
SF4
ClF3
H2O
NH3
Which of the following statement is correct regarding SF4 molecule?
SF4 molecule is bent shaped
SF4 molecule hasTrigonal bipyramidal shape
SF4 has SP3d hybridisation
SF4 has SP3d2 hybridisation
Which of the following statement is wrong?
The combining atomic orbitals must have same or nearly same energies
The extent of overlapping betwen the atomic orbitals of the two atoms shold be large
The combining atomic orbitals must have different energies
The combinig atomic orbitals must have the same symmetry
In which of the following substances will hydrogen bond be strongest?
HC
H2O
HI
H2S
Which of the following angle corresponds to sp2 hybridisation?
90°
120°
180°
109°
Which of the following statement is not correct from the view point of molecular orbital theory?
Be2 is not a stable molecule
He2 is not a stable molecule
Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period.
The order of energies of molecular orbitals in N2 molecule is
σ2s < σ* 2s < σ2pz < (π2pX = π2pY) < (π*2pX = π*2pY) < σ*2pz
Which of the following pair is expected to have the same bond order?
O2 , N2
O2+, N2–
O2 – , N2+
O2–, N2–
In which of the following molecules, σ2pz molecular orbital is filled before π2px and π2py molecular orbitals?
O2
C2
N2
B2
Which of the following statement is wrong for hyrogen bond?
Hydrogen bond is weaker than covalent bond
Hydrogen bond is stronger than vander waals forces of attraction
Intermolecular hydrogen bonding is weaker han intramolecular hydrogen bond.
none of the above
What are isoelectronic species?
same number of electrons
same number of neutrons
same number of protons
All the above
