JEE Questions for Chemistry Chemical Bonding And Molecular Structure Quiz 9 - MCQExams.com

How many bonds are there in?
Chemistry-Chemical Bonding and Molecular Structure-1238.png
  • 14 σ, 8π
  • 18 σ, 8π
  • 19 σ, 4π
  • 14 σ, 2π
Pair of species having identical shapes for molecules is
  • CF4 , SF4
  • BF3 , PCl3
  • XeF2, CO2
  • PF5 , IF7
A square planar complex is formed by hybridisation of the following atomic orbitals
  • s, px, py, pz
  • s, px, py, pz, d
  • d, s, px, py
  • s, px, py, pz, d, d
Bond angle of 109°28' is found in
  • NH3
  • H2O

  • Chemistry-Chemical Bonding and Molecular Structure-1239.png

  • Chemistry-Chemical Bonding and Molecular Structure-1240.png
Which orbital has highest energy ?
  • σ(2Px)
  • π∙(2Py)
  • σ(2S)
  • σ∙(1S)
Maximum how many numbers of hydrogen bond can be form by H2O molecule ?
  • 2
  • 4
  • 3
  • 1
Malleability and ductility of metals can be accounted due to
  • the presence of electrostatic force
  • the crystalline structure in metal
  • the capacity of layers of metal ions to slide over the other
  • the interaction of electrons with metal ions in the lattice
Oxygen and sulphur both are the member of same group in Periodic Table but H2O is liquid while H2 S is gas because
  • molecular weight of water is more
  • electronegativity of sulphur is more
  • H2S is weak acid
  • water molecules are having strong hydrogen bonds between them
For AB bond, if per cent ionic character is plotted against electronegativity difference (XA - XB ) , the shape of the curve would look like
The correct curve is
Chemistry-Chemical Bonding and Molecular Structure-1243.png
  • A
  • B
  • C
  • D
The bond length of HCl molecule is 1.275 Å and its dipole moment is 1.03 D. The ionic character of the molecule (in per cent) (charge of the electron = 4.8 x 10-10 esu) is
  • 100
  • 67.3
  • 33.66
  • 16.83
Consider the following halogen containing compounds
The compounds with a net zero dipole moment are
(A) CHCl3
(B) CCl4
(C) CH2Cl2
(D) CH3Cl
Chemistry-Chemical Bonding and Molecular Structure-1245.png
  • B and E
  • Only C
  • C and D only
  • A and D
  • Only B
Which of the following are possible resonating structure of N2O?
Chemistry-Chemical Bonding and Molecular Structure-1246.png
  • I and II
  • I and III
  • I, II and III
  • All of these
If the molecule of HCl were totally polar, the expected value of dipole moment is 6.12 D (debye), but the experimental value of dipole moment was 1.03 D. Calculate the percentage ionic character
  • 17
  • 83
  • 50
  • zero
  • 90
Sodium chloride is soluble in water but not in benzene because

  • Chemistry-Chemical Bonding and Molecular Structure-1248.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1249.png

  • Chemistry-Chemical Bonding and Molecular Structure-1250.png

  • Chemistry-Chemical Bonding and Molecular Structure-1251.png
Consider the Bom-Haber cycle for the formation of an ionic compound given below and identify the compound (Z) formed.
Chemistry-Chemical Bonding and Molecular Structure-1252.png
  • M+ X-
  • M+ X- (s)
  • MX
  • M+ X- (g)
The lattice enthalpy and hydration enthalpy of four compounds are given below
The pair of compounds which is soluble in water is
Chemistry-Chemical Bonding and Molecular Structure-1254.png
  • P and Q
  • Q and R
  • R and S
  • Q and S
  • P and R
The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, K+ , Ca 2+ , Mg 2+ , Be 2+?
  • Mg 2+ < Be2+ < K+ < Ca2+
  • Be2+ < K+ < Ca2+ < Mg2+
  • K+ < Ca2+ < Mg2+ < Be2+
  • Ca2+ < Mg 2+ < Be2+ < K+
Match the following columns, with the correct answer using the code given below the columns.
Chemistry-Chemical Bonding and Molecular Structure-1255.png
  • A = 2, B =1, C = 3, D = 4
  • A = 4, B =3, C = 1, D = 2
  • A = 2, B =3, C = 1, D = 4
  • A = 4, B =1, C = 3, D = 2
The relationship between the dissociation energy of N2 and N+2 is
  • dissociation energy of N2 = dissociation energy of N+2
  • dissociation energy of N2 can either be lower or higher than the dissociation energy of N+2
  • dissociation energy of N2 > dissociation energy of N+2
  • dissociation energy of N+2 > dissociation energy of N2

Chemistry-Chemical Bonding and Molecular Structure-1256.png

  • Chemistry-Chemical Bonding and Molecular Structure-1257.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1258.png
  • CN- and NO+
  • CN- and CN+
  • NO+ and CN+
The electronic configuration
Chemistry-Chemical Bonding and Molecular Structure-1259.png

  • Chemistry-Chemical Bonding and Molecular Structure-1260.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1261.png

  • Chemistry-Chemical Bonding and Molecular Structure-1262.png

  • Chemistry-Chemical Bonding and Molecular Structure-1263.png
Which of the following order of bond angles is correct?
  • BF3 < NF3 < PF3 < ClF3
  • BF3 < NF3 < PF3 > ClF3
  • ClF3 < PF3 < NF3 < BF3
  • BF3 ≈ NF3 < PF3 < ClF3
In which of the following species, all the three types of hybrid carbons are present ?

  • Chemistry-Chemical Bonding and Molecular Structure-1264.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1265.png

  • Chemistry-Chemical Bonding and Molecular Structure-1266.png

  • Chemistry-Chemical Bonding and Molecular Structure-1267.png

  • Chemistry-Chemical Bonding and Molecular Structure-1268.png
I. H—C—H angle in CH4
II. Cl—B—CI angle in BCl3
III. F—I—F angle in IF7 in a plane
IV. I—I—I angle in I-3
Increasing order of above bond angles is
  • I < II < III < IV
  • II < I < III < IV
  • III < I < II < IV
  • IV < II < I < III

Chemistry-Chemical Bonding and Molecular Structure-1270.png
  • valence shell electron pair 1 repulsion (VSEPR) theory
  • molecular orbital theory
  • presence of hydrogen bond
  • electronegativity difference between hydrogen and oxygen atoms
Match the compounds in the column I with that in column II.
Chemistry-Chemical Bonding and Molecular Structure-1271.png
  • A = 1, B = 4, C = 3, D = 2, E = 5
  • A = 2, B = 4, C = 1, D = 3, E = 4
  • A = 3, B = 4, C = 1, D = 2, E = 4
  • A = 4, B = 4, C = 1, D = 2, E = 5
H2O is dipolar, whereas BeF2 is not. It is because
  • the electronegativity of F is greater than that of O
  • H2O involves hydrogen bonding whereas BeF2 is a discrete molecule
  • H2O is linear and BeF2 is angular
  • H2O is angular and BeF2 is linear
In BrF3 molecule, the lone pairs occupy equatorial positions to minimise
  • lone pair-bond pair repulsion only
  • bond pair-bond pair repulsion only
  • lone pair-lone pair repulsion and lone pair-bond pair repulsion
  • lone pair-lone pair repulsion only
BCl3 is a planar molecule, while NCl3 is pyramidal, because
  • N— Cl bond is more covalent than B— Cl bond
  • nitrogen atom is smaller than boron atom
  • B— Cl bond is more polar than N— Cl bond
  • BCl3 has no lone pair of electrons but NCl3 has a lone pair of electrons
The molecular shapes of SF4 , CF4 and XeF4 are
  • different with 1, 0 and 2 lone pairs of electrons on the central atom, respectively
  • different with 0, 1 and 2 lone pairs of electrons on the central atom, respectively
  • the same with 1, 1 and 1 lone pair of electrons on the central atoms, respectively
  • the same with 2, 0 and 1 lone pairs of electrons on the central atom, respectively
0:0:1


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