Chemical Bonding Quiz | Chemical Bonding Objective Type Questions & Answers

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Questions
21 Among the following isostructural compounds, which one has highest lattice energy ?
A LiCl
B MgO
C NaCl
D LiF

Answer: MgO
22 A bonded molecule MX3 is T-shaped. The number of non-bonding pairs of electrons is :
A 0
B 2
C 1
D Can be predicted only if atomic number of M is known

Answer: 2
23 In a chemical change from PCl3 −−−→PCl5 the hybrid state of P changes from:
A sp2 to sp3
B sp3 to sp2
C sp3 to sp3d
D sp3 to dsp

Answer: sp3 to sp3d
24 The geometrical arrangement and shape of I−3 are respectively
A Trigonal bipyramidal geometry, linear shape
B Hexagonal structure, linear shape
C Triangular planar geometry, triangular shape
D Tetrahedral geometry, pyramidal shape

Answer: Trigonal bipyramidal geometry, linear shape
25 Which molecules/ions are most paramagnetic?
A B2
B C2
C O+2
D O−2

Answer: B2
26 Which has linear shape but not sp hibridisation ?
A XeF2
B I−3
C CO2
D Both 1 and 2

Answer: Both 1 and 2
27 Which of the following structure is most expected for the molecule XeOF4 ?
A Tetrahedral
B Square pyramid
C Square planar
D Octahedral

Answer: Square pyramid
28 Which is mismatched regarding the shape ?
A XeF4 = Square planar
B XeOF4 = Square Pyramidal
C XeF6 = Distorted Octahedral
D XeO3 = Bent Shape

Answer: XeO3 = Bent Shape
29 The isostere pair is
A CO2 and N2O
B CO and N2
C O2 and NO2
D Both (1) and (2)

Answer: Both (1) and (2)
30 Select the correct order of solubility (in water) from the following:
A SrSO4 < CaSO4 < MgSO4 < BeSO4
B NaF < KF < RbF < CsF
C Ba(OH)2 > SR(OH)2 > Ca(OH)2 > Mg(OH)2
D All of these

Answer: All of these
31 Which of the following has largest bond angle.
A H2O
B F2O
C Cl2O
D H2S

Answer: Cl2O
32 Amongst H2O, H2S, H2Se and H2Te the one with highest boiling point is:
A H2O because of H-bonding
B H2Te because of higher molecular weight
C H2S because of H-bonding
D H2Se because of lower molecular weight

Answer: H2O because of H-bonding
33 Which of the following are isoelectronic and isostructural? NO−3, CO-23, ClO−3, SO3
A NO−3, CO-23
B SO3, NO−3
C ClO−3, CO-23
D CO-23, ClO−3

Answer: NO−3, CO-23
34 Which of the following exhibits H-bonding?
A CH4
B H2Se
C N2H2
D H2S

Answer: N2H2
35 Which has highest bond angle ?
A NH3
B H2O
C H2S
D PH3

Answer: NH3
36 Which has highest bond energy ?
A CO
B CO+
C N2
D N+2

Answer: CO+
37 which is the incorrect about bond angles ?
A NH3 > NF3
B NF3 > PF3
C NH3 > PH3
D NH3 > H2O

Answer: NF3 > PF3
38 The types of hybrid orbitals of nitrogen in NO2+, NO3- and NH4+ respectively are expected to be
A sp, sp3 and sp2
B sp, sp2 and sp3
C sp2, sp and sp3
D sp2, sp3 and sp

Answer: sp, sp2 and sp3
39 Among LiCl, BeCl2, BCl3 and CCl4, the covalent bond character varies as
A LiCl < BeCl2 > BCl3 > CCl4
B LiCl > BeCl2 < BCl3 < CCl4
C LiCl < BeCl2 < BCl3 < CCl4
D LiCl > BeCl2 > BCl3 > CCl4

Answer: LiCl < BeCl2 < BCl3 < CCl4
40 Which of the following statement is not correct from the view point of molecular orbital theory ?
A Be2 is not a stable molecule
B He2 is not a stable but He2+ is expected to exist
C Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period
D The order of energies of molecular orbitals in N2 molecule is 2s < *2s < 2pz < (2px=2py) < (*2px=*2py) < *2pz

Answer: The order of energies of molecular orbitals in N2 molecule is 2s < *2s < 2pz < (2px=2py) < (*2px=*2py) < *2pz

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