JEE Main & Advanced Chemistry Chemical Bonding and Molecular Structure / रासायनिक आबंधन एवं आणविक संरचना Question Bank

done Self Evaluation Test - Chemical Bonding and Molecular Structure Total Questions - 60

• question_answer1)
  Which of the following contains both covalent and ionic bond?
  A)
  \[N{{H}_{4}}Cl\]  done clear
  B)
  \[{{H}_{2}}O\] done clear
  C)
  \[CC{{l}_{4}}\]                         done clear
  D)
  \[CaC{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer2)
  Which of the following is not a correct statement?
  A)
  Ionic compounds are electrically neutral. done clear
  B)
  Boiling point of an ionic compound is more than a covalent compound. done clear
  C)
  Melting point of a covalent compound is more than an ionic compound. done clear
  D)
  Ionic compounds are soluble in polar solvent. done clear
  View Solution play_arrow

• question_answer3)
  Main axis of a diatomic molecule is Z. \[A{O}'s\] \[{{p}_{x}}\]and \[{{p}_{y}}\] overlap to form which of the following orbitals?
  A)
  \[\pi -MO\]                     done clear
  B)
  \[\sigma -MO\] done clear
  C)
  \[\delta -MO\]                 done clear
  D)
  No bond will form done clear
  View Solution play_arrow

• question_answer4)
  The group having triangular planar structures is:
  A)
  \[B{{F}_{3}},N{{F}_{3}},CO{{_{3}^{2}}^{-}}\]       done clear
  B)
  \[CO_{3}^{2-}\text{, }NO_{3}^{-},\,\,S{{O}_{3}}\] done clear
  C)
  \[N{{H}_{3}},S{{O}_{3}},CO{{_{3}^{2}}^{-}}\]      done clear
  D)
  \[NC{{l}_{3}},BC{{l}_{3}},S{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer5)
  In piperidine the hybrid state assumed by N is
  A)
  \[sp\]                 done clear
  B)
  \[s{{p}^{2}}\]  done clear
  C)
  \[s{{p}^{3}}\]              done clear
  D)
  \[ds{{p}^{2}}\] done clear
  View Solution play_arrow

• question_answer6)
  The compound\[M{{X}_{4}}\]is tetrahedral. The number of\[\angle XMX\] formed in the compound are
  A)
  three                 done clear
  B)
  four   done clear
  C)
  five                   done clear
  D)
  six done clear
  View Solution play_arrow

• question_answer7)
  The correct order of hybridization of the central atom in the following species \[N{{H}_{3}},{{[PtC{{l}_{4}}]}^{2+}},\text{ }PC{{l}_{5}}\] and \[BC{{l}_{3}}\] is
  A)
  \[ds{{p}^{2}},ds{{p}^{3}},s{{p}^{2}}and\,s{{p}^{3}}\] done clear
  B)
  \[s{{p}^{3}},ds{{p}^{2}},s{{p}^{3}}d,s{{p}^{2}}\] done clear
  C)
  \[ds{{p}^{2}},s{{p}^{2}},s{{p}^{3}},ds{{p}^{3}}\] done clear
  D)
  \[ds{{p}^{2}},s{{p}^{3}},s{{p}^{2}},ds{{p}^{3}}\] done clear
  View Solution play_arrow

• question_answer8)
  The bond dissociation energy of \[B-F\] in\[~B{{F}_{3}}\] is \[646\text{ }kJ\text{ }mo{{l}^{-1}}\] whereas that of \[C-F\] in \[C{{F}_{4}}\] is\[515\text{ }kJ\text{ }mo{{l}^{-1}}\]. The correct reason for higher \[B-F\] bond dissociation energy as compared to that of \[C-F\] is
  A)
  stronger \[\sigma \] bond between B and F in\[~B{{F}_{3}}\] as compared to that between C and F in \[C{{F}_{4}}\]. done clear
  B)
  significant \[p\pi -p\pi \] interaction between B and F in\[B{{F}_{3}}\] whereas there is no possibility of such interaction between C and F in\[C{{F}_{4}}\]. done clear
  C)
  lower degree of \[p\pi -p\pi \] interaction between B and F in \[~B{{F}_{3}}\] than that between C and F in \[C{{F}_{4}}\] done clear
  D)
  Smaller size of \[B-atom\] as compared to that of C-atom. done clear
  View Solution play_arrow

• question_answer9)
  Amongst \[LiCl\],\[RbCl\],\[BeC{{l}_{2}}\], and \[Mg{{C}_{2}}\], the compounds with the greatest and the least ionic character, respectively are:   
  A)
  \[LiCl\]and \[RbCl\]   done clear
  B)
  \[RbCl\] and \[BeC{{l}_{2}}\], done clear
  C)
  \[MgC{{l}_{2}}\] and \[BeC{{l}_{2}}\] done clear
  D)
  \[RbCl\] and  \[MgC{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer10)
  Which of these statements is not true?
  A)
  \[N{{O}^{+}}\] is not isoelectronic with\[{{O}_{2}}\] done clear
  B)
  B is always covalent in its compounds done clear
  C)
  In aqueous solution, the \[T{{l}^{+}}\]ion is much more stable than Tl (III) done clear
  D)
  \[LiAl{{H}_{4}}\] is a versatile reducing agent in organic synthesis. done clear
  View Solution play_arrow

• question_answer11)
  Which of the following does not apply to metallic bond?
  A)
  Overlapping valence orbitals done clear
  B)
  Mobile valency electrons done clear
  C)
  Delocalized electrons done clear
  D)
  Highly directed bonds. done clear
  View Solution play_arrow

• question_answer12)
  In\[PO{{_{4}^{3}}^{-}}\], the formal charge on each oxygen atom and the \[P-O\]bond order respectively are
  A)
  \[-0.75,0.6\]                   done clear
  B)
  \[-0.75,\text{ }1.0\] done clear
  C)
  \[-0.75,\text{ }1.25.\]     done clear
  D)
  \[-3,\text{ }1.25\] done clear
  View Solution play_arrow

• question_answer13)
  Which one of the following formulae does not correctly represent the bonding capacities of the two atoms involved?
  A)
     done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer14)
  The dipole moments of diatomic molecules AB and CD are 10.41D and 10.27 D, respectively while their bond distances are 2.82 and \[2.67\overset{\text{o}}{\mathop{\text{A}}}\,\], respectively. This indicates that
  A)
  bonding is 100% ionic in both the molecules done clear
  B)
  AB has more ionic bond character than CD done clear
  C)
  AB has lesser ionic bond character than CD done clear
  D)
  bonding is nearly covalent in both the molecules done clear
  View Solution play_arrow

• question_answer15)
  Among the following, the species having the smallest bond is
  A)
  \[N{{O}^{-}}\]             done clear
  B)
  \[N{{O}^{+}}\] done clear
  C)
  \[O{{  }_{2}}\]                       done clear
  D)
  \[NO\] done clear
  View Solution play_arrow

• question_answer16)
  Which compound exhibits maximum dipole moment among the following?
  A)
     done clear
  B)
  done clear
  C)
                       done clear
  D)
  done clear
  View Solution play_arrow

• question_answer17)
  Molecular AB has a bond length of \[1.61\overset{\text{o}}{\mathop{\text{A}}}\,\]and a dipole moment of 0.38 D. The fractional charge on each atom (absolute magnitude) is: \[(e=4.802\times {{10}^{-10}}esu)\]
  A)
  0.5                    done clear
  B)
  0.05   done clear
  C)
  0                                  done clear
  D)
  1.0 done clear
  View Solution play_arrow

• question_answer18)
  In a regular octahedral molecule,\[M{{X}_{6}}\] the number of \[X-M-X\] bonds at \[180{}^\circ \] is
  A)
  three done clear
  B)
  two  done clear
  C)
  six                                done clear
  D)
  four done clear
  View Solution play_arrow

• question_answer19)
  Arrange the following ions in the order of decreasing\[~X-O\] bond length, where X is the central atom
  A)
  \[ClO_{_{4}}^{-},SO_{4}^{2-},PO_{4}^{3-},SiO_{4}^{-}\] done clear
  B)
  \[SiO_{4}^{4-},PO_{4}^{3-},SO_{4}^{2-},ClO_{4}^{-}\] done clear
  C)
  \[SiO_{4}^{4-},PO_{4}^{3-},ClO_{4}^{-},SO_{4}^{2-}\] done clear
  D)
  \[SiO_{4}^{4-},SO_{4}^{2-},PO_{4}^{3-},ClO_{4}^{-}\] done clear
  View Solution play_arrow

• question_answer20)
  Which of the following statements is correct in the context of the allene molecule, \[{{C}_{3}}{{H}_{4}}\]?
  A)
  The central carbon is sp hybridized done clear
  B)
  The terminal carbon atoms are \[s{{p}^{2}}\]hybridized done clear
  C)
  The planes containing the\[C{{H}_{2}}\]groups are mutually perpendicular to permit the formations two separate\[\pi \]bonds done clear
  D)
  All are correct done clear
  View Solution play_arrow

• question_answer21)
  Which of the following pairs have identical bond order?
  A)
  \[{{N}_{2}},O_{2}^{2+}\]        done clear
  B)
  \[{{N}_{2}},O_{2}^{-}\] done clear
  C)
  \[N_{_{2}}^{-},{{O}_{2}}\]                            done clear
  D)
  \[{{O}^{2+}},{{N}_{2}}\] done clear
  View Solution play_arrow

• question_answer22)
  Which of the following molecular orbitals has two nodal planes?
  A)
  \[\sigma 2s\]                   done clear
  B)
  \[\pi 2{{p}_{y}}\] done clear
  C)
  \[\pi *2{{p}_{y}}\]         done clear
  D)
  \[\sigma *2{{p}_{x}}\] done clear
  View Solution play_arrow

• question_answer23)
  Which one of the following molecules is polar?
  A)
  \[Xe{{F}_{4}}\]             done clear
  B)
  \[I{{F}_{5}}\]   done clear
  C)
  \[Sb{{F}_{5}}\]             done clear
  D)
  \[C{{F}_{4}}\] done clear
  View Solution play_arrow

• question_answer24)
  Bond distance in HF is \[~9.17\times {{10}^{-11}}m.\] Dipole moment of HF is \[6.104\times {{10}^{-30}}Cm.\] The percentage ionic character in HF will be: (electron charge\[=1.60\times {{10}^{-19}}C\])
  A)
  61.0%               done clear
  B)
  38.0% done clear
  C)
  35.5%                           done clear
  D)
  41.5% done clear
  View Solution play_arrow

• question_answer25)
  Dipole moment of\[{{H}_{2}}O\] is 1.85 D. If the bond angle is \[~105{}^\circ \] and\[O-H\] bond length is\[~0.94\overset{\text{o}}{\mathop{\text{A}}}\,\], what is the magnitude of charge on the oxygen atom in water molecule?
  A)
  \[2\times {{10}^{-10}}esu\]       done clear
  B)
  \[4.28\times {{10}^{-10}}esu\] done clear
  C)
  \[3.22\times {{10}^{-10}}esu\] done clear
  D)
  \[1.602\times {{10}^{-19}}C\] done clear
  View Solution play_arrow

• question_answer26)
  Which of the correct increasing order of lone pair of electrons on the central atom?
  A)
  \[I{{F}_{7}}<I{{F}_{5}}<Cl{{F}_{3}}<Xe{{F}_{2}}\] done clear
  B)
  \[I{{F}_{7}}<Xe{{F}_{2}}<Cl{{F}_{2}}<I{{F}_{5}}\] done clear
  C)
  \[I{{F}_{7}}<Cl{{F}_{3}}<Xe{{F}_{2}}<I{{F}_{5}}\] done clear
  D)
  \[I{{F}_{7}}<Xe{{F}_{2}}<I{{F}_{5}}<Cl{{F}_{3}}\] done clear
  View Solution play_arrow

• question_answer27)
  The molecules \[B{{F}_{3}}\] and \[N{{F}_{3}}\] are both covalent compounds, but \[B{{F}_{3}}\] is non polar whereas \[N{{F}_{3}}\] is polar. The reason for this is
  A)
  atomic size of boron is larger than nitrogen done clear
  B)
  Boron is metal while nitrogen is gas done clear
  C)
  \[B-F\] bonds are non-polar while \[N-F\] bonds are polar done clear
  D)
  \[B{{F}_{3}}\] is planar but \[N{{F}_{3}}\] is pyramidal done clear
  View Solution play_arrow

• question_answer28)
  Among the following chloro-compound having the lowest dipole moment is
  A)
  \[C{{H}_{3}}Cl\]                      done clear
  B)
  done clear
  C)
  \[C{{H}_{2}}C{{l}_{2}}\] done clear
  D)
  done clear
  View Solution play_arrow

• question_answer29)
  Although\[~C{{N}^{-}}\] ion and \[{{N}_{2}}\] molecule are isoelectronic, yet\[{{N}_{2}}\] molecule is chemically inert because of
  A)
  presence of more number of electrons in bonding orbitals done clear
  B)
  lone bond energy done clear
  C)
  absence of bond polarity done clear
  D)
  uneven electron distribution. done clear
  View Solution play_arrow

• question_answer30)
  The number and type of bonds in ion in\[~Ca{{C}_{2}}\]are:
  A)
  One \[\sigma \,\,bond\]and one \[\pi -bond\] done clear
  B)
  One \[\sigma \,\,bond\] and two \[\pi -bond\] done clear
  C)
  Two \[\sigma \,\,bond\] and two \[\pi -bond\] done clear
  D)
  Two \[\sigma \,\,bond\] and one \[\pi -bond\] done clear
  View Solution play_arrow

• question_answer31)
  Among the following compounds the one that is polar and has the central atom with \[~s{{p}^{2}}\] hybridization is
  A)
  \[{{H}_{2}}C{{O}_{3}}\]     done clear
  B)
  \[Si{{F}_{4}}\] done clear
  C)
  \[B{{F}_{3}}\]                          done clear
  D)
  \[HCl{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer32)
  Among the following ions the \[~p\pi -d\pi \] overlap could be present in
  A)
  \[NO_{2}^{-}\]       done clear
  B)
  \[NO_{3}^{-}\] done clear
  C)
  \[PO_{4}^{3-}\]    done clear
  D)
  \[CO_{3}^{2-}\] done clear
  View Solution play_arrow

• question_answer33)
  In the reaction \[2PC{{l}_{5}}\rightleftharpoons PCl_{_{4}}^{-}+PCl_{6}^{-}\], the change in hybridization is from
  A)
  \[s{{p}^{3}}d\] to \[s{{p}^{3}}\]and \[s{{p}^{3}}{{d}^{2}}\] done clear
  B)
  \[s{{p}^{3}}d\] to\[~s{{p}^{2}}\] and \[s{{p}^{3}}\] done clear
  C)
  \[s{{p}^{3}}d\] to \[s{{p}^{3}}{{d}^{2}}\] and \[s{{p}^{3}}{{d}^{3}}\] done clear
  D)
  \[s{{p}^{3}}{{d}^{2}}\]to \[s{{p}^{3}}\] and \[s{{p}^{3}}d\] done clear
  View Solution play_arrow

• question_answer34)
  In an octahedral structure, the pair of d orbitals involved in\[~{{d}^{2}}s{{p}^{3}}\] hybridization is
  A)
  \[{{d}_{{{x}^{2}}-{{y}^{2}}}},{{d}_{{{z}^{2}}}}\]      done clear
  B)
  \[{{d}_{xz}},{{d}_{{{x}^{2}}-{{y}^{2}}}}\] done clear
  C)
  \[{{d}_{{{z}^{2}}.}}{{d}_{xz}}\]                   done clear
  D)
  \[{{d}_{xy}},{{d}_{yz}}\] done clear
  View Solution play_arrow

• question_answer35)
  \[{{N}_{2}}\] and\[{{O}_{2}}\] are converted into monocations, \[N_{_{2}}^{+}\] and\[O_{_{2}}^{+}\] respectively. Which of the following statements is wrong?
  A)
  In \[N_{2}^{+},N-N\] bond weakens done clear
  B)
  In \[O_{2}^{+}\], the \[O-O\] bond order increases done clear
  C)
  In \[O_{2}^{+}\], paramagnetism decreases done clear
  D)
  \[N_{2}^{+}\] becomes diamagnetic done clear
  View Solution play_arrow

• question_answer36)
  The correct order of bond dissociation energy among \[{{N}_{2}},\,{{O}_{2}},O_{2}^{-}\] is shown in which of the following arrangements?
  A)
  \[{{N}_{2}}>O_{_{2}}^{-}>{{O}_{2}}\]       done clear
  B)
  \[O_{_{2}}^{-}>{{O}_{2}}>{{N}_{2}}\] done clear
  C)
  \[{{N}_{2}}>{{O}_{2}}>O_{2}^{-}\]   done clear
  D)
  \[{{O}_{2}}>O_{2}^{-}>{{N}_{2}}\] done clear
  View Solution play_arrow

• question_answer37)
  In\[Xe{{F}_{2}},\,\,Xe{{F}_{4}}\] and \[Xe{{F}_{6}}\,,\] the number of lone pairs on Xe are respectively
  A)
  2, 3, 1 done clear
  B)
                1, 2, 3 done clear
  C)
  4, 1, 2               done clear
  D)
  3, 2, 1 done clear
  View Solution play_arrow

• question_answer38)
  Which of the following represents the given mode of hybridisation \[s{{p}^{2}}-s{{p}^{2}}-sp-sp\] from left to right?
  A)
  \[{{H}_{2}}C=CH-C\equiv N\] done clear
  B)
  \[HC\equiv C-C\equiv CH\] done clear
  C)
  \[{{H}_{2}}C=C=C=C{{H}_{2}}\] done clear
  D)
  done clear
  View Solution play_arrow

• question_answer39)
  In \[Br{{F}_{3}}\] molecule, the lone pairs occupy equatorial positions to minimize
  A)
  lone pair - bond pair repulsion only done clear
  B)
  bond pair - bond pair repulsion only done clear
  C)
  lone pair - lone pair repulsion and lone pair bond pair repulsion done clear
  D)
  lone pair - lone pair repulsion only done clear
  View Solution play_arrow

• question_answer40)
  The group of molecules having identical shape is:
  A)
  \[PC{{l}_{5}},I{{F}_{5}},Xe{{O}_{2}}{{F}_{2}}\]      done clear
  B)
  \[B{{F}_{3}},PC{{l}_{3}},Xe{{O}_{3}}\] done clear
  C)
  \[S{{F}_{4}},Xe{{F}_{4}},CC{{l}_{4}}\]          done clear
  D)
  \[Cl{{F}_{3}},XeO{{F}_{2}},Xe{{F}_{3}}^{+}\] done clear
  View Solution play_arrow

• question_answer41)
  \[S{{F}_{2}},S{{F}_{4}}\] and \[S{{F}_{6}}\] have the hybridization at sulphur atom respectively as:
  A)
  \[s{{p}^{2}},s{{p}^{3}},s{{p}^{2}}{{d}^{2}}\]    done clear
  B)
  \[s{{p}^{3}},s{{p}^{3}},s{{p}^{3}}{{d}^{2}}\] done clear
  C)
  \[s{{p}^{3}},s{{p}^{3}}d,s{{p}^{3}}{{d}^{2}}\]   done clear
  D)
  \[s{{p}^{3}},sp{{d}^{2}},{{d}^{2}}s{{p}^{3}}\] done clear
  View Solution play_arrow

• question_answer42)
  Which of the following molecules has two sigma \[(\sigma )\] and two pi\[(\pi )\] bonds?
  A)
  \[{{C}_{2}}{{H}_{4}}\]                       done clear
  B)
  \[{{N}_{2}}{{F}_{2}}\] done clear
  C)
  \[{{C}_{2}}{{H}_{2}}C{{l}_{2}}\]                  done clear
  D)
  \[HCN\] done clear
  View Solution play_arrow

• question_answer43)
  The shape of \[IF_{6}^{-}\] is:
  A)
  Trigonally distorted octahedron done clear
  B)
  Pyramidal done clear
  C)
  Octahedral done clear
  D)
  Square antiprism done clear
  View Solution play_arrow

• question_answer44)
  Which of the following statement is correct?
  A)
  \[FeC{{l}_{2}}\]is more covalent than\[FeC{{l}_{3}}\]. done clear
  B)
  \[FeC{{l}_{3}}\]is more covalent than\[FeC{{l}_{2}}\]. done clear
  C)
  Both \[FeC{{l}_{2}}\] and \[FeC{{l}_{3}}\]are equally covalent. done clear
  D)
  \[FeC{{l}_{2}}\] and \[FeC{{l}_{3}}\]do not have any covalent character. done clear
  View Solution play_arrow

• question_answer45)
  The maximum number of \[~90{}^\circ \] angles between bond pair-bond pair of electrons is observed in
  A)
  \[ds{{p}^{2}}\] hybridization done clear
  B)
  \[s{{p}^{3}}d\] hybridization done clear
  C)
  \[ds{{p}^{3}}\] hybridization done clear
  D)
  \[s{{p}^{3}}{{d}^{2}}\] hybridization done clear
  View Solution play_arrow

• question_answer46)
  The true statements from the following are

  1. \[P{{H}_{5}}\] and \[BiC{{l}_{5}}\] do not exist

  2. \[p\pi -d\pi \] bond is present in \[S{{O}_{2}}\]

  3. Electrons travel with the speed of light

  4. \[Se{{F}_{4}}\]and \[C{{H}_{4}}\]have same shape

  5. \[I_{3}^{+}\]has bent geometry

  A)
  1, 3                               done clear
  B)
  1, 2, 5 done clear
  C)
  1, 3, 5                           done clear
  D)
  1, 2, 4 done clear
  View Solution play_arrow

• question_answer47)
  KF combines with HF to form \[KH{{F}_{2}}\]. The compound contains the species
  A)
  \[{{K}^{+}},{{F}^{-}}\]and \[{{H}^{+}}\]               done clear
  B)
  \[{{K}^{+}},{{F}^{-}}\] and HF done clear
  C)
  \[{{K}^{+}}\]and \[{{[H{{F}_{2}}]}^{-}}\]   done clear
  D)
  \[{{[KHF]}^{+}}\]and \[{{F}_{2}}\] done clear
  View Solution play_arrow

• question_answer48)
  Which of the following statements is incorrect?
  A)
  \[N{{H}_{3}}\] is more basic than \[P{{H}_{3}}.\] done clear
  B)
  \[N{{H}_{3}}\] has a higher boiling point than that of HF. done clear
  C)
  \[{{N}_{2}}\]is less reactive than\[{{P}_{4}}\]. done clear
  D)
  The dipole moment of \[N{{H}_{3}}\] is less than that of \[S{{O}_{2}}\]. done clear
  View Solution play_arrow

• question_answer49)
  In which of the following sets, all the given species are isostructural?
  A)
  \[CO{{  }_{2}},N{{O}_{2}},Cl{{O}_{2}},Si{{O}_{2}}\] done clear
  B)
  \[PC{{l}_{3}},AlC{{l}_{3}},BC{{l}_{3}},SbC{{l}_{3}}\] done clear
  C)
  \[B{{F}_{3}},N{{F}_{3}},P{{F}_{3}},Al{{F}_{3}}\] done clear
  D)
  \[BF_{4}^{-},CC{{l}_{4}},NH_{4}^{+},PCl_{4}^{+}\] done clear
  View Solution play_arrow

• question_answer50)
  The formation of molecular complex \[B{{F}_{3}}-N{{H}_{3}}\]  results in a change in hybridization of boron
  A)
  from \[s{{p}^{2}}\]to \[ds{{p}^{2}}\]  done clear
  B)
  from \[s{{p}^{2}}\]to \[s{{p}^{3}}\] done clear
  C)
  from \[s{{p}^{3}}\] to \[s{{p}^{2}}\]   done clear
  D)
  from \[s{{p}^{3}}\] to \[s{{p}^{3}}d\] done clear
  View Solution play_arrow

• question_answer51)
  Which of the following substances has the least ionic character?
  A)
  \[FeC{{l}_{2}}\]              done clear
  B)
  \[ZnC{{l}_{2}}\] done clear
  C)
  \[CdC{{l}_{2}}\]                       done clear
  D)
  \[MgC{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer52)
  Sulphur reacts with chlorine in 1 : 2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridisation state of central atom in the compound.
  A)
  \[s{{p}^{3}}\]   done clear
  B)
  \[s{{p}^{2}}\]   done clear
  C)
  sp                                 done clear
  D)
  \[ds{{p}^{2}}\] done clear
  View Solution play_arrow

• question_answer53)
  CaO and \[~NaCl\] have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of \[~NaCl\], the approximate lattice energy of \[CaO\] is     
  A)
  U/2                   done clear
  B)
  U     done clear
  C)
  4C        done clear
  D)
  2 U done clear
  View Solution play_arrow

• question_answer54)
  Dipole moment is shown by
  A)
  1, 4-dichlorobenzene done clear
  B)
  cis -1, 2-dichlorobenzene done clear
  C)
  trans -1,3-dichlorobenzene done clear
  D)
  trans -2, 3-dichloro -2- butane done clear
  View Solution play_arrow

• question_answer55)
  Which of the following has the square planar structure?
  A)
  \[Xe{{F}_{4}}\] done clear
  B)
  \[NH_{4}^{+}\] done clear
  C)
  \[BF_{4}^{-}\]                         done clear
  D)
  \[CC{{l}_{4}}\] done clear
  View Solution play_arrow

• question_answer56)
  Which one of the following molecules is paramagnetic?
  A)
  \[{{N}_{2}}\]                done clear
  B)
  NO  done clear
  C)
  CO                   done clear
  D)
  \[{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer57)
  Which one of the following pairs of molecules will have permanent dipole moments for both members?
  A)
  \[N{{O}_{2}}\] and\[C{{O}_{2}}\]        done clear
  B)
  \[N{{O}_{2}}\] and \[{{O}_{3}}\] done clear
  C)
  \[Si{{F}_{4}}\] and\[C{{O}_{2}}\]         done clear
  D)
  \[Si{{F}_{4}}\]and \[N{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer58)
  In which of the following ionization processes the bond energy has increased and also the magnetic behaviour has changed from paramagnetic to diamagnetic?
  A)
  \[NO\to N{{O}^{+}}\]     done clear
  B)
  \[{{N}_{2}}\to N_{2}^{+}\] done clear
  C)
  \[{{C}_{2}}\to {{C}_{2}}^{+}\]         done clear
  D)
  \[{{O}_{2}}\to {{O}_{2}}^{+}\] done clear
  View Solution play_arrow

• question_answer59)
  Bond order normally gives idea of stability of a molecular species. All the molecules viz. \[{{H}_{2}},L{{i}_{2}}\]and\[{{B}_{2}}\]have the same bond order yet they are not equally stable. Their stability order is
  A)
  \[{{H}_{2}}>L{{i}_{2}}>{{B}_{2}}\]     done clear
  B)
  \[L{{i}_{2}}>{{H}_{2}}>{{B}_{2}}\] done clear
  C)
  \[L{{i}_{2}}>{{B}_{2}}>{{H}_{2}}\]             done clear
  D)
  \[{{B}_{2}}>{{H}_{2}}>L{{i}_{2}}\] done clear
  View Solution play_arrow

• question_answer60)
  The internuclear distances in \[~O-O\] bonds for \[O_{2}^{+},{{O}_{2}},O_{2}^{-}\] and \[O_{2}^{2-}\] respectively are:
  A)
  \[1.30\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.49\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.12\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.21\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  B)
  \[1.49\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.21\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.12\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.30\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  C)
  \[1.21\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.12\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.49\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.30\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  D)
  \[1.12\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.21\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.30\overset{\text{o}}{\mathop{\text{A}}}\,,\text{ }1.49\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  View Solution play_arrow