CBSE Class 11 Chemistry Chemical Bonding and Molecular Structure MCQs Set E

Question. Which one of the following is a correct set?
(a) H₂O, sp³, angular
(b) BCI³,sp³, angular
(c) NH⁺₄, dsp², square planar
(d) CH⁴, dsp², tetrahedral
Answer: a

Question. The number of sigma and pi bonds in peroxodisu1phuric acid are respectively 
(a) 9 and 4
(b) 11 and 4
(c) 4 and 8
(d) 4 and 9 
Answer: b

Question. Which of the following is correct? 
(a) The number of electrons present in the valence shell ofS in SF₆ is 12
(b) The rates of ionic reactions are very slow
(c) According to VSEPR theory, SnCl₂ is a linear molecule
(d) The correct order of ability to form ionic compounds among Na⁺, Mg²⁺ and Al³⁺ is Al³⁺ > Mg²⁺ > Na⁺
Answer: a

Question. The shape of sulphate ion is
(a) square planar
(b) trigonal
(c) trigonal planar
(d) tetrahedral
Answer: d

Question. Cl—P—Cl bond angles in PCI₅ molecule are 
(a) 120° and 90°
(b) 60° and 90°
(c) 60° and 120°
(d) 1200 and 30°
Answer: a

Question. Amongst the following, the molecule that is linear is
(a) SO₂
(b) CO₂
(c) ClO₂
(d) NO₂
Answer: b

Question. The bond angle in AsH₃ is greater than that in 
(a) NH₃
(b) H₂O
(c) BCl₃
(d) None of these
Answer: d

Question. C—C bond length is maximum in 
(a) diamond
(b) graphite
(c) naphthalene
(d) fullerene
Answer: a

Question. In which reaction, the hybridisation on the central atom changes from sp² to sp³ ? 
(a) NH₃ + H⁺ → NH₄⁺
(b) BF₃ + F^– → BF₄^–
(c) H₂O + H⁺ → H₃O⁺
(d) C₂H₂ + 2H₂ → C₂H₆ 
Answer: b

Question. The molecular shapes of SF₄ , CF₄ and XeF₄ are 
(a) different with 1, 0 and 2 lone pairs of electrons on the central atom, respectively
(b) different with 0, l and 2 lone pairs of electrons on the central atom, respectively
(c) the same with 1, 1 and 1 lone pair of electrons on the central atoms, respectively
(d) the same with 2, 0 and 1 lone pairs of electrons on the central atom, respectively
Answer: a

Question. How many re-bonds are present in naphthalene? 
(a) 4
(b) 5
(c) 6
(d) 7
Answer: b

Question. Valence bond theory of metallic bond was given by
(a) Dalton
(b) Drude! 
(c) Fajan
(d) Pauling
Answer: d

Question. The actual geometry of NO^–₂ is 
(a) planar
(b) linear
(c) V-shape
(d) tetrahedral
Answer: c

Question. The C—O—H bond angle in ethanol is nearly 
(a) 90°
(b) 104°
(c) 120°
(d) 180°
Answer: b

Question. Which one of the following is a correct set with respect to molecule, hybridisation and shape ? 
(a) BeCI² , sp², linear
(b) BeCI² , sp², triangular planar
(c) BCI³ , sp², triangular planar
(d) BCI³ , sp³, tetrahedral
Answer: c

Question. Bond angles of NH₃ , PH₃, AsH₃ and SbH₃ is in the order
(a) PH₃ > AsH₃ > SbH₃ > NNH₃
(b) SbH₃ > AsH₃ > PH₃ > NH₃
(c) SbH₃ > AsH₃ > NH₃ > PH₃
(d) NH₃ > PH₃ > AsH₃ > SbH₃
Answer: d

Question. How manycr σ and n bonds are present in given compound ?
Ph-CH=C—C₂H₅
l
CH₃  
(a) 19σ and 4n-bonds
(c) 25σ and 4n-bonds
(b) 22σ and 4n-bonds
(d) 26σ and 4n-bonds
Answer: c

Question. BCI₃ is a planar molecule, while NCI₃ is pyramidal, because 
(a) N—Cl bond is more covalent than B—Cl bond
(b) nitrogen atom is smaller than boron atom
(c) B—Cl bond is more polar than N—Cl bond
(d) BCI₃ has no lone pair of electrons but NCI₃ has a lone pair of electrons
Answer: d

Question. Which one of the following compounds has the smallest bond angle in its molecule ? 
(a) SO₂
(b) H₂O
(c) SH₂
(d) NH₃
Answer: c

Question. Peroxide ion
I. has five completely filled antibonding molecular orbitals
II. is diamagnetic
III. has bond order one
IV. is isoelectronic with neon
Which one of these is correct? 
( a) II and III
(b) I, II and II
(c) I, II and III
(d) I and IV
Answer: a

Question. Shape and hybridisation of IF₅ respectively are
(a) trigonal bipyramidal, sp³d
(b) sea-saw, sp³d
(c) square pyramidal, sp³d²
(d) pentagonal pyramidal, sp³d³
Answer: c

Question. Which one of the following linear structure?
I.I₃^–
II NO₂^–
III. I₃⁺
IV. S0₂
V. N₃^–
(a) I, II and III
(b) IandV 
(c) II, III and IV
(d) All of these
Answer: b