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Chemical Bonding and Molecular Structure Class 11 MCQs Questions with Answers
Multiple Choice Type Questions
Question 1.
Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?
(a) HCl
(b) HF
(c) H2O
(d) NH3
Answer
Answer: (d) NH3
Question 2.
Which among the following has the largest dipole moment?
(a) NH3
(b) H2O
(c) HI
(d) SO3
Answer
Answer: (b) H2O
Question 3.
Maximum bond angle is present in case of
(a) BBr3
(b) BCl3
(c) BF3
(d) Same in all
Answer
Answer: (d) Same in all
Question 4.
Which of the following pairs of molecules will have permanent dipole moment for both members?
(a) NO2 and CO2
(b) NO2 and O3
(c) SiF4 and CO2
(d) SiF4 and NO2
Answer
Answer: (b) NO2 and O3
Question 5.
Which one of the following does not contain coordinate bond?
(a) BH\(_{4}^{-}\)
(b) NH\(_{4}^{-}\)
(c) CO\(_{3}^{2-}\)
(d) H3O+
Answer
Answer: (c) CO\(_{3}^{2-}\)
Question 6.
Which of the following are iso-structural?
(a) XeF2, IF~2
(b) NH3, BF3
(c) CO\(_{3}^{2-}\), SO\(_{3}^{2-}\)
(d) PCl5, ICl5
Answer
Answer: (a) XeF2, IF~2
Question 7.
Which of the following are isoelectronic and iso-structural NO\(_{3}^{-}\), CO\(_{3}^{2-}\), CIO\(_{3}^{-}\), SO3
(a) NO\(_{3}^{-}\),CO\(_{3}^{2-}\)
(b) SO3, NO\(_{3}^{-}\)
(c) CIO\(_{3}^{-}\), CO\(_{3}^{2-}\)
Answer
Answer: (a) NO\(_{3}^{-}\),CO\(_{3}^{2-}\)
Question 8.
Which of the following hydrocarbons has the lowest dipole moment?
(b) CH3C ≡ C CH3
(c) CH3CH2C ≡ CH
(d) CH2 = CH – C ≡ CH
Answer
Answer: (b) CH3C ≡ C CH3
Question 9.
The correct order of hybridisation of the central atom in the following species: NH3, [PtCl4]2-, PCl5 and BCl3 is
(a) dsp², dsp³, sp² and sp³
(b) sp³, dsp², dsp³, sp²
(c) dsp², sp², sp³, dsp³
(d) dsp², sp³, sp², dsp³.
Answer
Answer: (b) sp³, dsp², dsp³, sp²
Question 10.
Amongst H2O, H2S, H2Se and H2Te the one with the highest boiling point is
(a) H2O because of hydrogen bonding
(b) H2Te because of higher molecular weight
(c) H2S because of hydrogen bonding
(d) H2Se because of lower molecular weight.
Answer
Answer: (a) H2O because of hydrogen bonding
Question 11.
Among KO2, AlO\(_{2}^{-}\), BaO2 and NO\(_{2}^{+}\) unpaired electron is present in
(a) NO\(_{2}^{+}\) and BaO2
(b) KO2 and AIO\(_{2}^{-}\)
(c) KG2 only
(d) BaO2 only
Answer
Answer: (c) KG2 only
Question 12.
Number of π bonds in Naphthalene is
(a) 6
(b) 3
(c) 4
(d) 5
Answer
Answer: (d) 5
Question 13.
Hydrogen bonding is not present in
(a) Glycerine
(b) Water
(c) Hydrogen sulphide
(d) Hydrogen fluoride
Answer
Answer: (c) Hydrogen sulphide
Question 14.
In a double bond connecting two atoms there is a sharing of
(a) 2 electrons
(b) 4 electrons
(d) 1 electron
(d) all electrons
Answer
Answer: (b) 4 electrons
Question 15.
Atomic orbitals of carbon in Carbon dioxide are
(a) sp hybridised
(b) sp³d hybridised
(c) sp² hybridised
(d) sp³ hybridised
Answer
Answer: (a) sp hybridised
Question 16.
In which of the following bond angle is maximum?
(a) NH3
(b) NH\(_{4}^{+}\)
(c) PCl5
(d) SCl2
Answer
Answer: (b) NH\(_{4}^{+}\)
Question 17.
Sulphuric acid provides a simple example of
(a) Coordinate bonds
(b) non-covalent compound
(c) non-covalent ion
(d) none of these
Answer
Answer: (a) Coordinate bonds
Question 18.
The shape and hybridisation in BF3 is
(a) sp², linear
(b) sp³d, plannar
(c) sp², planar
(d) sp³ planar
Answer
Answer: (c) sp², planar
Question 19.
Bond dissociation energies of HF, HCl, HBr follow the order
(a) HCl > HBr > HF
(b) HF > HBr > HCl
(c) HF > HCl > HBr
(d) HBr > HCl > HF
Answer
Answer: (c) HF > HCl > HBr
Question 20.
Which of the following has zero dipole moment?
(a) CIF
(b) PCl3
(c) SiF4
(d) Cl3CF
Answer
Answer: (c) SiF4
Question 21.
Among the following the molecule with, highest dipole moment is
(a) CH3Cl
(b) CH2Cl2
(c) CHCl3
(d) CCl4
Answer
Answer: (a) CH3Cl
Question 22.
In which of the following species is the underlined carbon having sp3 hybridisation?
(a) CH3COOH
(b) CH3CH2OH
(c) CH3-CO-CH3
(d) CH2=CH-CH3
Answer
Answer: (b) CH3CH2OH
Question 23.
Which one of the following arrangements of molecules is correct on the basis of their dipole moments?
(a) BF3 > NF3 > NH3
(b) NF3 > BF3 > NH3
(c) NH3 > BF3 > NF3
(d) NH3 > NF3 > BF3
(e) NH3 = NF3 > BF3
Answer
Answer: (d) NH3 > NF3 > BF3
Question 24.
In OF2, number of bond pairs and lone pairs of electrons are respectively
(a) 2, 0
(b) 2, 8
(c) 2, 10
(d) 2, 9
Answer
Answer: (b) 2, 8
Question 25.
In NO\(_{3}^{-}\) ion, the number of bond pairs and lone pairs of electrons on N atoms are
(a) 2, 2
(b) 3, 1
(c) 1, 3
(d) 4, 0
Answer
Answer: (d) 4, 0
Question 26.
In which of the following pairs the two species have identical bond order?
(a) N\(_{2}^{-}\), O\(_{2}^{2-}\)
(b) N\(_{2}^{+}\), O\(_{2}^{-}\)
(c) N\(_{2}^{-}\), O\(_{2}^{+}\)
(d) O\(_{2}^{+}\), N\(_{2}^{2-}\)
Answer
Answer: (c) N\(_{2}^{-}\), O\(_{2}^{+}\)
Question 27.
The bond order of O\(_{2}^{-}\) is
(a) 0.5
(b) 1.5
(c) 2.5
(d) 3.5.
Answer
Answer: (b) 1.5
Question 28.
Which of the following is not paramagnetic?
(a) N\(_{2}^{+}\)
(b) CO
(c) O\(_{2}^{-}\)
(d) NO.
Answer
Answer: (b) CO
Question 29.
The number of antibonding electron pairs in O\(_{2}^{2-}\) molecular ion on the basis of M.O. theory (At. No. of O = 8) is
(a) 2
(b) 3
(c) 4
(d) 5
Answer
Answer: (c) 4
Question 30.
Main axis of a diatomic molecule is Z. Atomic orbitals px and py overlap to form which of the following orbital?
(a) π-molecular orbital
(b) σ-molecular orbital
(c) δ-molecular orbital
(d) no bond will form
Answer
Answer: (d) no bond will form
Fill in the Blanks
Question 1.
H2O shows ……………….. hybridization, whereas BeF2 shows hybridization.
Answer
Answer: sp³, sp
Question 2.
02 has ………………. unpaired electron, whereas O2 has unpaired electrons.
Answer
Answer: one, two
Question 3.
Out of C2H6, C2H4, CH4, C2H2 it is only ……………….. which shows sp hybridization.
Answer
Answer: C2H2
Question 4.
CaC2 molecule has ……………….. bonds in it.
Answer
Answer: ionic
Question 5.
Atomic orbitals of carbon in carbon dioxide are ……………….. hybridized.
Answer
Answer: sp
Question 6.
molecule contains ……………….. σ bonds and ……………….. π bonds.
Answer
Answer: 19, 4
Question 7.
XeF2 and CO2 molecules have ……………….. shapes.
Answer
Answer: identical or linear
Question 8.
PF5 has ……………….. geometry whereas IF5 has geometry.
Answer
Answer: Trigonal bipyramid, square planar
Question 9.
The lone pair-lone pair repulsion are ……………….. than lone pair-bond pair repulsions.
Answer
Answer: more
Question 10.
A bond formed between two atoms by the overlap of their atomic orbitals along the internuclear axis is called a ……………….. bond.
Answer
Answer: sigma (σ)
True/False Statements
Question 1.
Bond order of O2 is greater than that of O\(_{2}^{+}\)
Answer
Answer: False
Question 2.
Bond length in N2 is greater than that of O2.
Answer
Answer: False
Question 3.
O2 is paramagnetic whereas O\(_{2}^{2-}\) is diamagnetic.
Answer
Answer: True
Question 4.
BF3 is triangular planar, whereas NH3 is pyramidal.
Answer
Answer: True
Question 5.
HF shows hydrogen bonding but HBr does not.
Answer
Answer: True
Question 6.
Both benzene and carbon tetrachloride are non-polar.
Answer
Answer: True
Question 7.
The presence of polar bonds in a polyatomic molecule suggests that the molecule has non-zero dipole moment.
Answer
Answer: False
Question 8.
Whereas NH3 has one lone pair of electrons, NH\(_{4}^{+}\) ion does not have any.
Answer
Answer: True
Question 9.
The dipole moment of NF3 is more than NH3.
Answer
Answer: True
Question 10.
Out of sp³, sp², sp hybrid orbitals, sp³ has maximum s-character.
Answer
Answer: False
Match Type Questions
| Column I | Column II |
| (a) Stable octet rule | (i) unpaired electrons |
| (b) NaCl | (ii) sp³ hybridization |
| (c) CH4 | (iii) Ionic compound |
| (d) Paramagnetism | (iv) Lewis |
Answer
Answer:
| Column I | Column II |
| (a) Stable octet rule | (iv) Lewis |
| (b) NaCl | (iii) Ionic compound |
| (c) CH4 | (ii) sp³ hybridization |
| (d) Paramagnetism | (i) unpaired electrons |
| Column I | Column II |
| (a) SnCl2 | (i) Linear |
| (b) CO\(_{3}^{2-}\) | (ii) V-shape |
| (c) HgCl2 | (iii) Trigonal pyramidal |
| (d) H3O+ | (iv) Triangular planar |
Answer
Answer:
| Column I | Column II |
| (a) SnCl2 | (ii) V-shape |
| (b) CO\(_{3}^{2-}\) | (iii) Trigonal pyramidal |
| (c) HgCl2 | (i) Linear |
| (d) H3O+ | (iv) Triangular planar |
| Column I | Column II |
| (a) O-nitrophenol | (i) duplet |
| (b) H2O | (ii) Intramolecular H-bond |
| (c) Benzene | (iii) Intermolecular H-bond |
| (d) H2 | (iv) Triangular planar |
Answer
Answer:
| Column I | Column II |
| (a) O-nitrophenol | (ii) Intramolecular H-bond |
| (b) H2O | (iii) Intermolecular H-bond |
| (c) Benzene | (iv) Non-polar |
| (d) H2 | (i) duplet |
| Column I | Column II |
| (a) ICl\(_{2}^{2}\) | (i) V-shape |
| (b) NH\(_{2}^{-}\) | (ii) Linear |
| (c) NH\(_{4}^{+}\) | (iii) Tetrahedral |
| (d) [PtCl4]2- | (iv) square planar |
Answer
Answer:
| Column I | Column II |
| (a) ICl\(_{2}^{2}\) | (ii) Linear |
| (b) NH\(_{2}^{-}\) | (i) V-shape |
| (c) NH\(_{4}^{+}\) | (iii) Tetrahedral |
| (d) [PtCl4]2- | (iv) square planar |
| Column I | Column II |
| (a) NO | (i) 1 .5 |
| (b) CO | (ii) 2 |
| (c) BN | (iii) 2.5 |
| (d) CN+ | (iv) 3 |
Answer
Answer:
| Column I | Column II |
| (a) NO | (iii) 2.5 |
| (b) CO | (iv) 3 |
| (c) BN | (ii) 2 |
| (d) CN+ | (i) 1 .5 |
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