CBSE Class 11 Chemistry Chemical Bonding and Molecular Structure MCQs Set 05

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

Question. Which of the following structures will have a bond angle of 120° around the central atom?
(a) Linear
(b) Tetrahedral
(c) Triangular
(d) Square planar 
Answer: c

Question. Which of the following species contain non-directional bonds ?
(a) NCl₃
(b) BeCl₂
(c) BCl₃
(d) RbCl
Answer: b

Question. The weakest interparticle forces are found in which of the following?
(a) Ionic Solids
(b) Metallic Solids
(c) Molecular Solids
(d) All types of solids are equal in terms of interparticle forces. 
Answer: c

Question. An atom of an element A has three electrons in its outermost orbit and that of B has six electrons in its outermost orbit. The formula of the compound between these two will be
(a) A₃ B₆
(b) A₂ B₃
(c) A₃ B₂
(d) A₂ B
Answer: b

Question. Which one of the following pairs of species have the same bond order?
(a) CN⁻ and NO⁺
(b) CN⁻ and CN⁺
(c) O₂⁻ and CN⁻
(d) NO⁺ and CN⁺ 
Answer: d

Question. The hybrid state of sulphur in SO₂ molecule is :
(a) sp²
(b) sp³
(c) sp 
(d) sp³d 
Answer: a

Question. Which of the following types of hybridisation leads to three dimensional geometry of bonds around the carbon atom ?
(a) sp
(b) sp²
(c) sp³ 
(d) None of these
Answer: b

Question. The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing order of the polarizing power of the cationic species, K⁺, Ca²⁺, Mg²⁺, Be²⁺?
(a) Ca²⁺ < Mg²⁺ < Be²⁺ < K⁺
(b) Mg²⁺ < Be²⁺ < K⁺ < Ca²⁺
(c) Be²⁺< K⁺ < Ca²⁺ < Mg²⁺
(d) K⁺ < Ca²⁺ < Mg²⁺ < Be²⁺
Answer: d

Question. Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?
(a) RbCl
(b) KCl
(c) NaCl
(d) LiCl
Answer: c

Question. In allene (C₃H₄), the type(s) of hybridisation of the carbon atoms is (are)
(a) sp and sp³
(b) sp and sp²
(c) Only sp²
(d) sp² and sp³ 
Answer: b