CBSE Class 11 Chemistry Chemical Bonding And Molecular Structure Worksheet Set B

Chemical Bonding and Molecular Structure MCQ Questions with Answers Class 11 Chemistry

Question. Which species does not exhibit paramagnetism?
(1) N ₂⁺
(2) O ₂^–
(3) CO
(4) NO
Answer (3)

Question. Which one of the following species does not exist under normal conditions?
(1) Li₂
(2) Be₂^-
(3) Be ₂
(4) B ₂
Answer (3)

Question. The maximum number of 180° angle possible between X-M-X bond for compounds with sp³d² and sp³ dhybridisation respectively are
(1) 3, 3
(2) 3, 1
(3) 1, 3
(4) 3, 0
Answer (2)

Question. Which of the following molecule stabilizes by removal of electron?
(1) C ₂
(2) O ₂
(3) N ₂
(4) H ₂
Answer (2)

Question. In NO ₃ ^– ion number of bond pair and lone pair of electrons on nitrogen atom are
(1) 2, 2
(2) 3, 1
(3) 1, 3
(4) 4, 0
Answer (4)

Question. Which of the following statement is correct?
(1) The hybridisation of Cl in ClF ₃ is sp ²
(2) The number of lone pairs and bond pairs in I 3 – are 2 and 2 respectively
(3) The shape of XeF 6 is distorted square bipyramidal
(4) Hybridisation of S is sp ³ in SO ₂
Answer (3)

Question. Which of the following is not a correct statement?
(1) Multiple bonds are always shorter than corresponding single bonds
(2) The electron-deficient molecules can act as Lewis acids
(3) The canonical structures have no real existence
(4) Every AB ₅ molecules does in fact have square pyramid structure
Answer (4)

Question. A certain diatomic molecule, AB has dipole moment 1.6 D and the internuclear distance is 100 pm. The percentage of electronic charge existing on more electronegative atom is
(1) 33%
(2) 25%
(3) 50%
(4) 10%
Answer (1)

Question. The hybrid orbital having only 20% d character
(1) CCl ₄
(2) SF₆
(3) SF₄
(4) Cl₂O
Answer (3)

Question. Which of the following is correct for XeO₂F₂ and PCl₅ ?
(1) Both have same hybridisation and shape
(2) Both have same hybridisation but different geometry
(3) Both have different hybridisation but same shape
(4) Both have same hybridisation but different shape
Answer (4)

Question.Which one of the following has the strongest O – O bond?
(1) O₂⁺
(2) O₂
(3) O₂^–
(4) O₂ ^2–
Answer (1)

Question. Some of the properties of the two species, NO₃^- and H ₃ O⁺ are described below. Which one of them is correct?
(1) Dissimilar hybridization for the central atom with different structures
(2) Isostructural with same hybridization for the central atom
(3) Isostructural with different hybridization for the central atom
(4) Similar hybridization for the central atom with different structures
Answer (1)

Question. From the following which group of elements easily forms cation?
a. F, Cl, Br
b. Li, Na, K
c. O, S, Se
d. N, P, As
Answer : B

Question. Lattice energy of an ionic compound depends upon:
a. Charge on the ion only
b. Size of the ion only
c. Packing of ions only
d. Charge on the ion and size of the ion
Answer : D

Question. The sulphate of a metal has the formula M₂(SO₄)₃ The formula for its phosphate will be:
a. M(HPO₄)₂
b. M₃(PO₄)₂
c. M₂(PO₄)₃
d. MPO₄
Answer : D

Question. Which of the following has a high polarising power?
a. Mg²⁺
b. Al³⁺
c. Na+
d. Ca²⁺
Answer : B

Question. Maximum covalent character is associated with the compound:
a. NaI
b. MgI₂
c. AlCl₃
d. AlI₃
Answer : D

Question. Chemical formula for calcium pyrophosphate is o 120 The formula for ferric pyrophosphate will be:
a. Fe₃(P₂O₇)₃
b. Fe₄P4O14
c. Fe₄(P₂O₇)₃
d. Fe₃PO₄
Answer : C

Question. Out of the following, which compound will have electrovalent bonding?
a. Ammonia
b. Water
c. Calcium chloride
d. Chloromethane
Answer : A

Question. Two element have electro-negativity of 1.2 and 3.0. Bond formed between them would be:
a. Ionic
b. Polar covalent
c. Co-ordinate
d. Metallic
Answer : C

Question. Atoms or group of atoms which are electrically charged are known:
a. Anions
b. Cations
c. Ions
d. Atoms
Answer : D

Question. When NaCl is dissolved in water the sodium ion becomes?
a. Oxidized
b. Reduced
c. Hydrolysed
d. Hydrated
Answer : C

Question. Which is the most covalent?
a. C − O
b. C − Br
c. C − S
d. C − F
Answer : C

Question. The correct sequence of increasing covalent character is represented by:
a. LiCl < NaCl < BeCl₂
b. BeCl < NaCl < LiCl₂
c. NaCl < LiCl < BeCl₂
d. BeCl < LiCl < NaCl₂
Answer : C

Question. The electronic configuration of four elements are given in brackets
L(1s² , 2s² 2p¹); M(1s² , 2s² 2p³ )
Q(1s² , 2s² 2p⁶ , 3s²); R(1s² , 2s² 2p²)
The element that would most readily form a diatomic molecule is:
a. Q
b. M
c. R
d. L
Answer : B

Question. For the formation of covalent bond, the difference in the value of electro-negativities should be:
a. Equal to or less than 1.7
b. More than 1.7
c. 1.7 or more
d. None of these
Answer : A

Question. The valence of phosphorus in H₃PO₄ is:
a. 2
b. 5
c. 4
d. 1
Answer : B

Question. The inter-atomic distances in H₂ and Cl₂ molecules are 74 and 198 pm respectively. The bond length of HCl is:
a. 272 pm
b. 136 pm
c. 124 pm
d. 248 pm
Answer : B

Question. Which of the following compounds does not follow the octet rule for electron distribution?
a. PCl₅
b. PCl₃
c. H₂O
d. PH₃
Answer : A

Question. Which type of bond is present in H₂S molecule?
a. Ionic bond
b. Covalent bond
c. Co-ordinate
d. All of three
Answer : B

Question. Which of the following does not obey the octet rule?
a. CO
b. NH₃
c. H₂O
d. PCl₅
Answer : A, D

VA simple example of a coordinate covalent bond is exhibited by:
a. C₂H₂
b. H₂SO₄
c. H₂O
d. HCl
Answer : B

Question. The bond that exists between NH₃ and BF₃ is called:
a. Electrovalent
b. Covalent
c. Coordinate
d. Hydrogen
Answer : C

Question. Which of the following compounds has coordinate (dative) bond?
a. CH₃NC
b. CH₃OH
c. CH₃Cl
d. NH₃
Answer : A

Question. The compound containing co-ordinate bond is:
a. O₃
b. SO₃
c. H₂SO₄
d. All of these
Answer : D

Question. Sulphuric acid provides a example of:
a. Co-ordinate bonds
b. Non-covalent compound
c. Covalent and co-ordinate bond
d. Non-covalent ion
Answer : C

Question. Which molecule is linear?
a. NO₂
b. ClO₂
c. CO₂
d. H₂S
Answer : C

Question. A sp³ hybridized orbital contains:
a. (1/4) s − character
b. (1/2) s − character
c. (2/3) s − character
d. (3/4) s − character
Answer : A

Question. The shape of IF₇ molecule is:
a. Octahedral
b. Pentagonal bipyramidal
c. Trigonal bipyramidal
d. Tetrahedral
Answer : B

Question. Which of the following is non-linear molecule?
a. CO₃
b. CO₂
c. CS₂
d. BeCl₂
Answer : A

Question. The trigonal bipyramidal geometry results from the hybridisation:
a. dsp³ or 3 sp³ d
b. dsp³ or 2 sp³ d
c. d² sp³ or sp³ d²
d. d³ sp³ or d² sp³
Answer : A

Question. For which of the following hybridisation the bond angle is maximum?
a. sp²
b. sp
c. sp³
d. dsp²
Answer : B

Question. Which of the following hybridisation has maximum scharacters?
a. sp³
b. sp²
c. sp
d. None of these
Answer : C

Question. The percentage s-character of the hybrid orbitals in methane, ethene and ethyne are respectively:
a. 25, 33, 50
b. 25, 50, 75
c. 50, 75, 100
d. 10, 20, 40
Answer : A

Question. Among the following compounds the one that is polar and has central atom with 2 sp − hybridization is:
a. H₂CO₃
b. BF₃
c. SiF₄
d. HClO₂
Answer : A

Question. In which compound, the hydrogen bonding is the strongest in its liquid phase?
a. HF
b. HI
c. CH₄
d. PH₃
Answer : A

Question. Point out incorrect statement about resonance:
a. Resonance structures should have equal energy
b. In resonance structures, the constituent atoms should be in the same position
c. In resonance structures, there should not be the same number of electron pairs
d. Resonance structures should differ only in the location of electrons around the constituent atoms
Answer : C

Question. The number of possible resonance structures for CO₃²⁻ is:
a. 2
b. 3
c. 6
d. 9
Answer : B

Question. Which of the following molecule contains one pair of non-bonding electrons?
a. CH₄
b. NH₃
c. H₂O
d. HF
Answer : B

Question. In the cyanide ion, the formal negative charge is on:
a. C
b. N
c. Both
C and N
d. Resonate between C and N
Answer : B

Question. Of the following species the one having a square planar structure is:
a. NH₄⁺
b. BF₄⁻
c. XeF₄
d. SCl₄
Answer : C

VIn which of the following is the angle between the two covalent bonds greatest?
a. CO₂
b. CH₄
c. NH₃
d. H₂O
Answer : A

Question. As the s-character of hybridized orbital decreases, the bond angle:
a. Decreases
b. Increases
c. Does not change
d. Becomes zero
Answer : A

Question. Of the following sets which one does NOT contain isoelectronic species?
a. PO₄³⁻ ,SO₄²⁻ ,ClO₄⁻
b. CN⁻ ,N₂ ,C₃²⁻
c. SO₃²⁻ ,CO₃²⁻ ,NO₃⁻
d. BO₃²⁻ ,CO₃²⁻ ,NO₃⁻
Answer : C

Question. Which has the least bond angle?
a. NH₃
b. BeF₂
c. H₂O
d. CH₄
Answer : C

Question. The bond angle in ammonia molecule is:
a. 91^o 8′
b. 93^o 3'
c. 106^o 45'
d. 109^o 28'
Answer : C

Question. The bond order in N₂⁺ ion is:
a. 1
b. 2
c. 2.5
d. 3
Answer : C

Question. Which of the following molecule is paramagnetic?
a. Chlorine
b. Nitrogen
c. Oxygen
d. Hydrogen
Answer : C

Question. Out of the following which has smallest bond length?
a. O₂
b. O₂⁺
c. O₂⁺
d. O₂^2-
Answer : B

Question. Which of the following is paramagnetic?
a. O₂⁺
b. CN⁻
c. CO
d. N₂
Answer : A

Question. The bond order in NO is 2.5 while that in NO⁺ is 3. Which
of the following statements is true for these two species?
a. Bond length in NO⁺ is equal to that in NO
b. Bond length in NO is greater than in NO⁺
c. Bond length in NO⁺ is greater than in NO
d. Bond length is unpredictable
Answer : B

Notes for Class 11 Chemistry Chemical Bonding

Instructions:

1. All questions are compulsory.

2. Please give the explanation for the answer where applicable.

Q1 - What is hydrogen bonding? Name the two types of hydrogen bonding?

Q2 -Find

(i) Formal charge on S in HSO4-

(ii) Formal charge on P in orthophosphoric acid

Q3 - Which of the following bond is most polar?

(i) Cl-F

(ii) Br-F

(iii) I-F

(iv) F-F

Q4 - Which of the following compound will have highest solubility in water CCl₄, CHCl₃, CS₂,C₂H₅OH.

Q5 - Name the type of hybridisation in each carbon atom of the following compounds —

(i) 1, 2 – butadiene

(ii) Propyne

Q6 - Find the bond order of NO and CO.

Q7 - How is bond order related to the stability of a molecule?

Q8 - What is the maximum number of hydrogen bonds in which a water molecule can participate?

Q9 - Arrange F₂, N₂, Cl₂, O₂ in increasing order of bond strengths.