UNIT 10: Chemical bonding - Online Test
Q1. Which of these represents the correct order of their increasing bond order.
Answer : Option D
Explaination / Solution:
Q2. Hybridisation
of central atom in PCl5 involves the mixing of orbitals.
Answer : Option C
Explaination / Solution:
PCl5 – Sp3d hybridization
S, Px , Py , Pz and dx2 −y2
Q3. The correct order of O-O bond length in hydrogen peroxide, ozone and oxygen is
Answer : Option B
Explaination / Solution:
O2 > O3 > H2O2
2 > 1.5 > 1
Q4. Which one of the following is diamagnetic.?
Answer : Option B
Explaination / Solution:
O22–
is diamagnetic. Additional two electrons paired in antibonding molecular
orib-ital π*2Py and π*2 Pz
Q5. Bond order of a species is 2.5 and the number of electons in its bonding molecular orbital is formd to be 8 The no. of electons in its antibonding molecular orbital is
Answer : Option A
Explaination / Solution:
5 = 8 – na
na = 8-5 = 3
Q6. Shape
and hybridisation of IF5 are
Answer : Option C
Explaination / Solution:
IF5
- 5 bond pair + 1 lone pair hybridisation Sp3d2
Q7. Pick out the incorrect statement from the following
Answer : Option C
Explaination / Solution:
Correct statement : All five Sp3d hybrid orbitals
are equivalent
incorrect statement : Option (c)
Q8. The molecules having same hybridisation, shape and number of lone pairs of electons are
Answer : Option A
Explaination / Solution:
SeF4, XeO2F2 - Sp3d
hybridisation,
First option T-shaped, one line pair on central atom.
Q9. In
which of the following molecules / ions BF3, NO2-,
H2 O the central atom is sp2 hybridised?
Answer : Option C
Explaination / Solution:
H2O - Central atom Sp3 hybridised
NO2– - Central atom Sp2 hybridised
BF3 - Central atom Sp2 hybridised
NH2– - Central atom Sp3 hybridised
option
Q10. Some
of the following properties of two species, NO3- and H3O+
are described below. which one of them is correct?
Answer : Option A
Explaination / Solution:
NO3– - Sp2 hybridisation,
planar
H3O+ - Sp3 hybridisation,
pyramidal
