JEE Questions for Chemistry Chemical Bonding And Molecular Structure Quiz 15 - MCQExams.com

Which of the following molecular species has unpaired electron (s) ?
  • N2
  • F2

  • Chemistry-Chemical Bonding and Molecular Structure-1382.png

  • Chemistry-Chemical Bonding and Molecular Structure-1383.png
Which of the following hydrocarbons has the lowest dipole moment ?

  • Chemistry-Chemical Bonding and Molecular Structure-1385.png
  • CH3 C0 CCH3
  • CH3CH2C ≡ CH
  • CH2 = CH – C ≡ CH
The nodal plane in the π - bond of ethene is located in
  • the molecular plane
  • a plane parallel to the molecular plane
  • a plane perpendicular to the molecular plane which bisects the carbon – carbon sigma bond at right angle
  • a plane perpendicular to the molecular plane which contains the carboncarbon σ-bond.
In XeF2, XeF4 and XeF6 , the number of lone pairs on Xe is respectively
  • 2,3,1
  • 1,2,3
  • 4, 1, 2
  • 3,2,1
Which of the following statements is true ?
  • HF is less polar than HBr
  • Absolutely pure water does not contain any ions
  • Chemical bond formation takes place when forces of attraction overcome the forces of repulsion
  • In covalency, transference of electrons takes place
Which of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms?
  • Sigma bond is stronger than a pi-bond
  • Bond energies of sigma and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol.
  • Free rotation of atoms about a sigma bond is allowed but not in case of a pi- bond
  • Sigma – bond determines the direction between carbon atoms but a pibond has no primary effect in this regard.
Which of the following pair of molecules will have permanent dipole moment for both members ?
  • NO2 and CO2
  • NO2 and O3
  • SiF4 and CO2
  • SiF4 and NO2
Which one of the following compounds has the smallest bond angle in its molecule?
  • OH2
  • SH2
  • NH3
  • SO2
Paramagnetism of oxygen is explained on the basis of its electronic configuration of

  • Chemistry-Chemical Bonding and Molecular Structure-1387.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1388.png

  • Chemistry-Chemical Bonding and Molecular Structure-1389.png

  • Chemistry-Chemical Bonding and Molecular Structure-1390.png
Which of the following leads to bonding?

  • Chemistry-Chemical Bonding and Molecular Structure-1391.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1392.png

  • Chemistry-Chemical Bonding and Molecular Structure-1393.png

  • Chemistry-Chemical Bonding and Molecular Structure-1394.png

  • Chemistry-Chemical Bonding and Molecular Structure-1395.png
Among the following, the molecule with highest dipole moment is
  • CH3Cl
  • CH2Cl2
  • CHCl3
  • CCl4
Which of the following, are isoelectronic and isostructural ?
Chemistry-Chemical Bonding and Molecular Structure-1397.png

  • Chemistry-Chemical Bonding and Molecular Structure-1398.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1399.png

  • Chemistry-Chemical Bonding and Molecular Structure-1400.png

  • Chemistry-Chemical Bonding and Molecular Structure-1401.png
What type of hybridisation takes place in the N - atom Of NH3 ?
  • sp2
  • sp3
  • dsp2
  • sp
If Z-axis is taken as the molecular axis, then π orbitals are formed by
  • 2px and 2pz
  • 2px and 2px
  • 2s and 2py
  • 2s and 2pz
A pair of compounds which have odd electrons in the group NO,CO, ClO2,N2O5,SO2 and O3 are
  • NO and ClO2
  • CO and SO2
  • ClO2 and CO
  • SO2 and O3
The cyanide ion, CN- and N2 are isoelectronic. But in contrast to CN- , N2 is chemically inert, because of
  • low bond energy
  • absence of bond polarity
  • unsymmetrical electron distribution
  • presence of more number of electrons in bonding orbitals
A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1Å, what percentage of electronic charge exists on each atom?
  • 12% of e
  • 19% of e
  • 25% of e
  • 29% of e
In which of the following set of molecules is the order of boiling points incorrect ?
  • Xe > Ar > He
  • HF > HCl > HBr
  • H2 O > H2Se >H 2S
  • C3H8 > C2H6 > CH4
The electronic configurations of four elements are :
Chemistry-Chemical Bonding and Molecular Structure-1406.png
  • L2P, RL,PQ, R2Q
  • LP, RL, PQ, RQ
  • P2L, RL, PQ,RQ2
  • LP, R2L, P2Q, RQ
AICl3 is covalent while AIF3 is ionic. This fact can be justified on the basis of
  • Valence bond theory
  • Crystal structure
  • Lattice energy
  • Fajan Rule
The nature of π - bond in perchlorate ion is
  • O (dπ) - Cl (pπ)
  • O (pπ ) - Cl (dπ )
  • O (dπ) - Cl (dπ )
  • O (dπ) - Cl (dπ)
Among the following diatomic molecules, the shortest bond length is to be found in
  • C2
  • N2
  • O2
  • F2
Consider the given figure showing that possible levels of the energy of H+2 ion depending on internuclear distance versus potential energy of the system .

  • Chemistry-Chemical Bonding and Molecular Structure-1409.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1410.png
  • Curve 1 indicates that the molecular hydrogen ion is formed
  • Curve 2 represents the energy level of the antibonding region.
Match List I (species) with List II (Hybrid orbitals used by the central atom in their formation) and select the correct answer:
Chemistry-Chemical Bonding and Molecular Structure-1412.png
  • A = 1, B = 3, C = 2, D = 4
  • A = 3, B = 4, C = 2, D = 1
  • A = 4, B = 2, C = 1, D = 3
  • A = 4, B = 3, C = 2, D = 1
Match List I with List II and select the correct answer :
Chemistry-Chemical Bonding and Molecular Structure-1414.png
  • A = 1, B = 2, C = 4, D = 5
  • A = 4, B = 5, C = 2, D = 3
  • A = 1, B = 5, C = 4, D = 3
  • A = 5, B = 1, C = 3, D = 4

Chemistry-Chemical Bonding and Molecular Structure-1416.png

  • Chemistry-Chemical Bonding and Molecular Structure-1417.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1418.png

  • Chemistry-Chemical Bonding and Molecular Structure-1419.png

  • Chemistry-Chemical Bonding and Molecular Structure-1420.png
Which of the following pair of species is isoelectronic and same structure ?

  • Chemistry-Chemical Bonding and Molecular Structure-1421.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1422.png

  • Chemistry-Chemical Bonding and Molecular Structure-1423.png

  • Chemistry-Chemical Bonding and Molecular Structure-1424.png
Which of the following molecule possesses polar and nonpolar covalent bond ?
  • NH4Cl
  • CCl4
  • H2O2
  • HCN
Which of the following compound does not possesses coordinate covalent bond ?
  • CO
  • SO2
  • HNO2
  • HNO3
Correct structure of SF4 is

  • Chemistry-Chemical Bonding and Molecular Structure-1428.png
  • 2)
    Chemistry-Chemical Bonding and Molecular Structure-1429.png

  • Chemistry-Chemical Bonding and Molecular Structure-1430.png

  • Chemistry-Chemical Bonding and Molecular Structure-1431.png
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