Solved papers for NEET Chemistry Chemical Bonding and Molecular Structure / रासायनिक आबंधन एवं आणविक संरचना NEET PYQ-Chemical Bonding Molecular

done NEET PYQ-Chemical Bonding Molecular Total Questions - 92

• question_answer1) In \[PO_{4}^{3-}\] ion, the formal charge on each oxygen atom and \[P-O\] bond order respectively are: [AIPMT 1998]
  A)
         \[-\text{ }0.75,\text{ }0.6\]        
  done clear
  B)
        \[-\text{ }0.75,\text{ }1.0\]        
  done clear
  C)
   \[-\text{ }0.75,\text{ }1.25\]
  done clear
  D)
       \[-\text{ }3,\text{ }1.25\]
  done clear
  View Answer play_arrow

• question_answer2) The number of anti-bonding electrons in \[O_{2}^{2-}\] molecular ion on the basis of molecular orbital theory is (Atomic no. of O is 8):                                                                                                          [AIPMT 1998]
  A)
  5         
  done clear
  B)
                    2
  done clear
  C)
  4         
  done clear
  D)
       6
  done clear
  View Answer play_arrow

• question_answer3) The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1 : 1 is:                  [AIPMT 1999]
  A)
   distillation
  done clear
  B)
     crystallization
  done clear
  C)
   vaporization
  done clear
  D)
           colour spectrum
  done clear
  View Answer play_arrow

• question_answer4) The type of hybridisation of boron in diborane is:                                       [AIPMT 1999]
  A)
   sp-hybridisation
  done clear
  B)
       \[s{{p}^{2}}\]-hybridisation
  done clear
  C)
   \[s{{p}^{3}}\]-hybridisation
  done clear
  D)
          \[s{{p}^{3}}{{d}^{2}}\]-hybridisation
  done clear
  View Answer play_arrow

• question_answer5) Which one of the following is planar?
  A)
   \[Xe{{F}_{4}}\]                       
  done clear
  B)
   \[Xe{{O}_{4}}\]
  done clear
  C)
   \[Xe{{O}_{3}}F\]   
  done clear
  D)
   \[Xe{{O}_{3}}{{F}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer6) Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding? [AIPMT 2000]
  A)
   \[N{{H}_{3}}\]   
  done clear
  B)
                    \[{{H}_{2}}O\]
  done clear
  C)
   HCl 
  done clear
  D)
   HF
  done clear
  View Answer play_arrow

• question_answer7) Among the following the electron deficient compound is:                             [AIPMT 2000]
  A)
  \[BC{{l}_{3}}\]
  done clear
  B)
        \[CC{{l}_{4}}\]
  done clear
  C)
   \[PC{{l}_{5}}\]  
  done clear
  D)
         \[BeC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer8) The relationship between the dissociation energy of \[{{N}_{2}}\] and \[N_{2}^{+}\] is:                  [AIPMT 2000]
  A)
   dissociation energy of \[N_{2}^{+}>\] dissociation energy of \[N_{2}^{+}\]
  done clear
  B)
        dissociation energy of \[{{N}_{2}}=\] dissociation energy of \[N_{2}^{+}\]
  done clear
  C)
        dissociation energy of \[{{N}_{2}}>\] dissociation energy of \[N_{2}^{+}\]
  done clear
  D)
        dissociation energy of \[{{N}_{2}}\] can either be lower or higher than the dissociation energy of \[N_{2}^{+}\]
  done clear
  View Answer play_arrow

• question_answer9) Which one of   the following is not paramagnetic?                                                   [AIPMT 2000]
  A)
   NO  
  done clear
  B)
                    \[N_{2}^{+}\]           
  done clear
  C)
   CO     
  done clear
  D)
   \[O_{2}^{-}\]
  done clear
  View Answer play_arrow

• question_answer10) Which of the following two are isostructural?                                                           [AIPMT 2001]
  A)
   \[Xe{{F}_{2}},\,IF_{2}^{-}\]  
  done clear
  B)
   \[N{{H}_{3}},\,B{{F}_{3}}\]
  done clear
  C)
   \[CO_{3}^{2-},\,SO_{3}^{2-}\]                     
  done clear
  D)
   \[PC{{l}_{5}},\,IC{{l}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer11) In which of the following, bond angle is maximum?                                    [AIPMT 2001]
  A)
   \[N{{H}_{3}}\]
  done clear
  B)
                    \[NH_{4}^{+}\]
  done clear
  C)
   \[PC{{I}_{3}}\]
  done clear
  D)
        \[SC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer12) In \[X-H.......Y,\,\,X\] and Y both are electronegative elements:                    [AIPMT 2001]
  A)
   electron density on X will increase and on H will decrease
  done clear
  B)
   in both electron density will increase
  done clear
  C)
        in both electron density will decrease
  done clear
  D)
   on X electron density will decrease and at H increase
  done clear
  View Answer play_arrow

• question_answer13) Main axis of a diatomic molecule is z, molecular orbital \[{{p}_{x}}\] and \[{{p}_{y}}\] overlaps to form, which of the orbital?                                                                                                                               [AIPMT 2001]
  A)
   \[\pi -\]molecular orbital 
  done clear
  B)
   \[\sigma -\]molecular orbital
  done clear
  C)
        \[\delta -\]molecular orbital
  done clear
  D)
        No bond will form
  done clear
  View Answer play_arrow

• question_answer14) In \[NO_{3}^{-}\] ion number of bond pair and lone pair of electron on nitrogen atom are:   [AIPMT 2002]
  A)
   2, 2                 
  done clear
  B)
        3, 1                 
  done clear
  C)
  1, 3
  done clear
  D)
   4, 0
  done clear
  View Answer play_arrow

• question_answer15) Among the following, the pair in which the two species are not isostructural, is:                                    [AIPMT (S) 2004]
  A)
   \[Si{{F}_{4}}\] and \[S{{F}_{4}}\]       
  done clear
  B)
   \[IO_{3}^{-}\] and \[Xe{{O}_{3}}\]
  done clear
  C)
   \[B{{H}_{4}}\] and \[NH_{4}^{+}\]
  done clear
  D)
        \[PF_{6}^{-}\] and \[SF_{6}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer16) In a regular octahedral molecule, \[M{{X}_{6}}\] the number of \[X-M-X\] bonds at 180° is:    [AIPMT (S) 2004]
  A)
   three               
  done clear
  B)
        two                 
  done clear
  C)
   six      
  done clear
  D)
   four
  done clear
  View Answer play_arrow

• question_answer17) \[{{H}_{2}}O\] is dipolar, whereas \[Be{{F}_{2}}\] is not. It is because:                      [AIPMT (S) 2004]
  A)
   the electro negativity of F is greater than that of O
  done clear
  B)
   \[{{H}_{2}}O\] involves hydrogen bonding whereas\[Be{{F}_{2}}\]  is a discrete molecule
  done clear
  C)
   \[{{H}_{2}}O\]is linear and \[Be{{F}_{2}}\] is angular
  done clear
  D)
    \[{{H}_{2}}O\] is angular and \[Be{{F}_{2}}\] is linear
  done clear
  View Answer play_arrow

• question_answer18) In \[Br{{F}_{3}}\] molecule, the lone pairs occupy equatorial positions to minimize:               [AIPMT (S) 2004]
  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 Answer play_arrow

• question_answer19) The correct order in which the \[O-O\] bond length increases in the following is:                       [AIPMT (S) 2005]
  A)
         \[{{H}_{2}}{{O}_{2}}<{{O}_{2}}<{{O}_{3}}\]       
  done clear
  B)
   \[{{O}_{3}}<{{H}_{2}}{{O}_{2}}<{{O}_{2}}\]
  done clear
  C)
   \[{{O}_{2}}<{{O}_{3}}<{{H}_{2}}{{O}_{2~}}\]
  done clear
  D)
        \[{{O}_{2}}<{{H}_{2}}{{O}_{2}}<{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer20) Which of the following molecules has trigonal planar geometry?              [AIPMT (S) 2005]
  A)
   \[I{{F}_{3}}~~\]
  done clear
  B)
                    \[PC{{l}_{3}}\]
  done clear
  C)
   \[N{{H}_{3}}\]    
  done clear
  D)
   \[B{{F}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer21) The correct sequence of increasing covalent character is represented by:                                 [AIPMT (S) 2005]
  A)
   \[LiCl<NaCl<BeC{{l}_{2}}\]   
  done clear
  B)
   \[~BeC{{l}_{2}}<NaCl<LiCl\]
  done clear
  C)
   \[~NaCl<LiCl<BeC{{l}_{2}}\]
  done clear
  D)
   \[BeC{{l}_{2}}<LiCl<NaCl\]
  done clear
  View Answer play_arrow

• question_answer22) Which of the following is the electron deficient molecule?                       [AIPMT (S) 2005]
  A)
   \[{{B}_{2}}{{H}_{6}}\]         
  done clear
  B)
        \[{{C}_{2}}{{H}_{6}}\]
  done clear
  C)
  \[P{{H}_{3}}\]
  done clear
  D)
   \[Si{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer23) The surface tension of which of the following liquid is maximum?           [AIPMT (S) 2005]
  A)
   \[{{H}_{2}}O\]    
  done clear
  B)
      \[{{C}_{6}}{{H}_{6}}\]
  done clear
  C)
   \[C{{H}_{3}}OH\]      
  done clear
  D)
    \[{{C}_{2}}{{H}_{5}}OH\]
  done clear
  View Answer play_arrow

• question_answer24) Which of the following would have a permanent dipole moment?                                   [AIPMT (S) 2005]
  A)
   \[B{{F}_{3}}\]  
  done clear
  B)
     \[Si{{F}_{4}}\]
  done clear
  C)
   \[S{{F}_{4}}\]       
  done clear
  D)
       \[Xe{{F}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer25) Which one of the following oxides is expected to exhibit paramagnetic behaviour?                   [AIPMT (S) 2005]
  A)
         \[C{{O}_{2}}\]
  done clear
  B)
               \[S{{O}_{2}}\]
  done clear
  C)
   \[Cl{{O}_{2}}\]     
  done clear
  D)
                   \[Si{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer26) In which of the following molecules are all the bonds not equal?            [AIPMT (S) 2006]
  A)
   \[Cl{{F}_{3}}\]           
  done clear
  B)
   \[B{{F}_{3}}\]
  done clear
  C)
   \[Al{{F}_{3}}\]     
  done clear
  D)
                   \[N{{F}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer27) The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of \[N{{H}_{3}}\] (1.5 D) is larger than that of \[N{{F}_{3}}\] (0.2 D). This is because:            [AIPMT (S) 2006]
  A)
   in \[N{{H}_{3}}\] as well as in \[N{{F}_{3}}\] the atomic dipole and bond dipole are in the same direction
  done clear
  B)
        in \[N{{H}_{3}}\] the atomic dipole and bond dipole are in the same direction whereas in \[N{{F}_{3}}\] these are in opposite directions
  done clear
  C)
        in \[N{{H}_{3}}\] as well as \[N{{F}_{3}}\] the atomic dipole and bond dipole are in opposite directions
  done clear
  D)
        in \[N{{H}_{3}}\] the atomic dipole and bond dipole are in the opposite directions whereas in \[N{{F}_{3}}\]these are in the same directions
  done clear
  View Answer play_arrow

• question_answer28) The correct order regarding the electronegativity of hybrid orbitals of carbon is:                        [AIPMT(S) 2006]
  A)
         \[sp>s{{p}^{2}}<s{{p}^{3}}\]
  done clear
  B)
        \[sp>s{{p}^{2}}>s{{p}^{3}}\]
  done clear
  C)
    \[sp<s{{p}^{2}}>s{{p}^{3}}\]
  done clear
  D)
        \[sp<s{{p}^{2}}<s{{p}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer29) Which of the following species has a linear shape?
  A)
   \[NO_{2}^{-}\]                       
  done clear
  B)
   \[S{{O}_{2}}\]
  done clear
  C)
   \[NO_{2}^{+}\]         
  done clear
  D)
        \[{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer30) Which of the following is not isostructural with\[SiC{{l}_{4}}\]?                               [AIPMT (S) 2006]
  A)
   \[SC{{l}_{4}}\]
  done clear
  B)
                    \[SO_{4}^{2-}\]         
  done clear
  C)
   \[PO_{4}^{3-}\]
  done clear
  D)
                    \[NH_{4}^{+}\]
  done clear
  View Answer play_arrow

• question_answer31) The correct order of \[C-O\] bond length among \[CO,\,\,CO_{3}^{2-},\,C{{O}_{2}}\] is:          [AIPMT (S) 2007]
  A)
   \[C{{O}_{2}}<CO_{3}^{2-}<CO\]    
  done clear
  B)
   \[CO<CO_{3}^{2-}<C{{O}_{2}}\]
  done clear
  C)
   \[CO_{3}^{2-}<C{{O}_{2}}<CO~\] 
  done clear
  D)
   \[CO<C{{O}_{2}}<CO_{3}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer32) In which of the following pairs, the two species are iso-structural?                                              [AIPMT (S) 2007]
  A)
   \[S{{F}_{4}}\] and \[Xe{{F}_{4}}\]      
  done clear
  B)
   \[SO_{3}^{2-}\] and \[NO_{3}^{-}\]
  done clear
  C)
   \[B{{F}_{3}}\] and \[N{{F}_{3}}\]   
  done clear
  D)
   \[BrO_{3}^{-}\] and \[Xe{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer33) The angular shape of ozone molecule \[({{O}_{3}})\] consists of                      [AIPMT (S) 2008]
  A)
   1 sigma and 2 pi bonds
  done clear
  B)
   2 sigma and 2 pi bonds
  done clear
  C)
   1 sigma and 1 pi bonds
  done clear
  D)
   2 sigma and 1 pi bonds
  done clear
  View Answer play_arrow

• question_answer34) The correct order of increasing bond angles in the following triatomic species is                         [AIPMT (S) 2008]
  A)
   \[NO_{2}^{-}<NO_{2}^{+}<N{{O}_{2}}\]
  done clear
  B)
   \[NO_{2}^{-}<N{{O}_{2}}<NO_{2}^{+}\]
  done clear
  C)
  \[NO_{2}^{+}<N{{O}_{2}}<NO_{2}^{-}\]  
  done clear
  D)
   \[NO_{2}^{+}<NO_{2}^{-}<N{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer35) Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order?                                                                                        [AIPMT (S) 2008]
  A)
   \[O_{2}^{-}<NO<C_{2}^{2-}<He_{2}^{+}\]
  done clear
  B)
   \[NO<C_{2}^{2-}<O_{2}^{-}He_{2}^{+}\]
  done clear
  C)
   \[C_{2}^{2-}<He_{2}^{+}<NO<O_{2}^{-}\]
  done clear
  D)
   \[He_{2}^{+}<O_{2}^{-}<NO<C_{2}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer36) In the hydrocarbon                                                                                                                      [AIPMT (S) 2008] \[\underset{6}{\mathop{C{{H}_{3}}}}\,-\underset{5}{\mathop{CH}}\,=\underset{4}{\mathop{CH}}\,-\underset{3}{\mathop{C{{H}_{2}}}}\,-\underset{2}{\mathop{C}}\,\equiv \underset{1}{\mathop{CH}}\,\] The state of hybridisation of carbons 1, 3 and 5 are in the following sequence
  A)
   \[~s{{p}^{2}},sp,\text{ }s{{p}^{3}}\]                       
  done clear
  B)
   \[sp,\text{ }s{{p}^{3}},\text{ }s{{p}^{2}}\]
  done clear
  C)
   \[sp,\text{ }s{{p}^{2}},\text{ }s{{p}^{3}}\]      
  done clear
  D)
   \[s{{p}^{3}},s{{p}^{2}},\text{ }sp\]
  done clear
  View Answer play_arrow

• question_answer37) According to MO theory which of the following lists ranks the nitrogen species in tends of increasing bond order?       [AIPMT (S) 2009]
  A)
   \[\underset{\begin{smallmatrix}  \text{ }\!\!|\!\!\text{ } \\  \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix}  \text{H} \\  \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,=\underset{\begin{smallmatrix}  \text{ }\!\!|\!\!\text{ } \\  \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix}  \text{H} \\  \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,+\text{H}-\xrightarrow[{}]{{}}\text{H}-\underset{\begin{smallmatrix}  \text{ }\!\!|\!\!\text{ } \\  \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix}  \text{H} \\  \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,-\underset{\begin{smallmatrix}  \text{ }\!\!|\!\!\text{ } \\  \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix}  \text{H} \\  \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,-\text{H}\]
  done clear
  B)
        \[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  C)
   \[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  D)
        \[\text{mo}{{\text{l}}^{\text{-1}}}\]
  done clear
  View Answer play_arrow

• question_answer38) The state of hybridization of \[\text{mo}{{\text{l}}^{\text{-1}}}\] and \[1.77\times {{10}^{-5}}\]is in the following sequence                                                                                                            [AIPMT (S) 2009]
  A)
   \[sp,\text{ }s{{p}^{3}},\text{ }s{{p}^{2}}\] and \[s{{p}^{3}}\]
  done clear
  B)
   \[s{{p}^{3}},\text{ }s{{p}^{2}},\text{ }s{{p}^{2}}\] and sp
  done clear
  C)
   \[sp,\text{ }s{{p}^{2}},\text{ }s{{p}^{2}}\] and \[s{{p}^{3}}\]
  done clear
  D)
   \[sp,s{{p}^{2}},\text{ }s{{p}^{3}}\] and \[s{{p}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer39) In the case of alkali metals, the covalent character decreases in the order             [AIPMT (S) 2009]
  A)
   \[MCl>Ml>MBr>MF\]
  done clear
  B)
   \[MF>MCl>MBr>Ml\]
  done clear
  C)
   \[MF>MCl>MI>MBr\]
  done clear
  D)
   \[Al>MBr>MCl>MF\]
  done clear
  View Answer play_arrow

• question_answer40) In which of the following molecules/ions \[B{{F}_{3}},\,NO_{2}^{-},\,NH_{2}^{-}\] and \[{{H}_{2}}O\], the central atom is sp2 hybridised?                                                                                                   [AIPMT (S) 2009]
  A)
   \[NO_{2}^{-}\] and\[NH_{2}^{-}\]
  done clear
  B)
        \[NH_{2}^{-}\] and \[{{H}_{2}}O\]
  done clear
  C)
   \[NO_{2}^{-}\] and \[{{H}_{2}}O\]
  done clear
  D)
        \[B{{F}_{2}}\] and \[NO_{2}^{-}\]
  done clear
  View Answer play_arrow

• question_answer41) What is the dominant intermolecular force or bond that must be overcome in converting liquid \[C{{H}_{3}}OH\] to a gas?                                                                                                                        [AIPMT (S) 2009]
  A)
   Hydrogen bonding
  done clear
  B)
   Dipole-dipole interaction
  done clear
  C)
   Covalent bonds
  done clear
  D)
   London dispersion force
  done clear
  View Answer play_arrow

• question_answer42) In which of the following pairs of molecules/ions, the central atoms have sp2 hybridization?       [AIPMT (S) 2010]
  A)
  \[NO_{2}^{-}\] and \[N{{H}_{3}}\]
  done clear
  B)
       \[BF_{3}^{{}}\] and \[NH_{2}^{-}\]
  done clear
  C)
  \[NH_{2}^{-}\] and \[H_{2}^{{}}O\]
  done clear
  D)
        \[BF_{3}^{{}}\] and
  done clear
  View Answer play_arrow

• question_answer43) Which one of the following species does not exist under normal conditions?                             [AIPMT (S) 2010]
  A)
   x\[Be_{2}^{+}\]                    
  done clear
  B)
       \[Be_{2}^{{}}\]
  done clear
  C)
   \[{{B}_{2}}\]              
  done clear
  D)
        \[Li_{2}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer44) The correct order of increasing bond angles in the following species is      [AIPMT (S) 2010]
  A)
   \[C{{l}_{2}}O<Cl{{O}_{2}}<ClO_{2}^{-}\]
  done clear
  B)
        \[C{{l}_{2}}O<C{{l}_{2}}O<ClO_{2}^{-}\]
  done clear
  C)
   \[C{{l}_{2}}O<ClO_{2}^{-}<ClO_{2}^{{}}\]
  done clear
  D)
        \[ClO_{2}^{-}<C{{l}_{2}}O<ClO_{2}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer45) In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three?                                                                                [AIPMT (S) 2010]
  A)
   \[S{{F}_{4}}\]              
  done clear
  B)
        \[I_{3}^{-}\]              
  done clear
  C)
   \[SbCl_{5}^{2-}\]       
  done clear
  D)
        \[PC{{l}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer46) In which of the following molecules the central atom does not have sp3 hybridisation?  [AIPMT (M) 2010]
  A)
   \[C{{H}_{4}}\]       
  done clear
  B)
   \[S{{F}_{4}}\]
  done clear
  C)
   \[BF_{4}^{-}\]           
  done clear
  D)
        \[NH_{4}^{+}\]
  done clear
  View Answer play_arrow

• question_answer47) Some of the properties of the two species, \[NO_{3}^{-}\]and \[{{H}_{3}}O_{{}}^{+}\] are described below. Which one of them is correct?                                                                                                              [AIPMT (M) 2010]
  A)
   Dissimilar in hybridisation for the central atom with different structures
  done clear
  B)
   Isostructural with same hybridisation for the central atom
  done clear
  C)
   Isostructural with different hybridization for the central atom
  done clear
  D)
   Similar in hybridisation for the central atom with different structures
  done clear
  View Answer play_arrow

• question_answer48)  Considering the state of hybridisation of carbon atoms, find out the molecule among the following which is linear.                                                                                                                           [AIPMT (S) 2011]
  A)
   \[C{{H}_{3}}-C\equiv C-C{{H}_{3}}\]
  done clear
  B)
        \[C{{H}_{2}}=CH-C{{H}_{2}}-C\equiv CH\]
  done clear
  C)
   \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  D)
  \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer49)   Which of the two ions from the list given below, have the geometry that is explained by the same hybridisation of orbitals, \[NO_{2}^{-},NO_{3}^{-},\]\[NH_{2}^{-},\]\[NH_{4}^{+},\]\[SC{{N}^{-}}?\]              [AIPMT (S) 2011]
  A)
   \[NH_{4}^{-}\] and \[NO_{3}^{-}\]    
  done clear
  B)
   \[SCN_{{}}^{+}\] and \[NO_{2}^{-}\]
  done clear
  C)
   \[NO_{2}^{-}\] and \[NH_{2}^{-}\]
  done clear
  D)
        \[NO_{2}^{-}\] and \[NH_{3}^{-}\]
  done clear
  View Answer play_arrow

• question_answer50) Which of the following compounds has the lowest melting point?                        [AIPMT (S) 2011]
  A)
   \[CaB{{r}_{2}}\]                     
  done clear
  B)
    \[Ca{{l}_{2}}\]
  done clear
  C)
   \[Ca{{F}_{2}}\]                      
  done clear
  D)
        \[CaC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer51) Which of the following has the minimum bond length?                                      [AIPMT (S) 2011]
  A)
   \[O_{2}^{-}\] 
  done clear
  B)
                    \[O_{2}^{2-}\]
  done clear
  C)
   \[O_{2}^{{}}\]                      
  done clear
  D)
        \[O_{2}^{+}\]
  done clear
  View Answer play_arrow

• question_answer52) The correct order of increasing bond length of \[C-H,C-O,C-C\] and \[C=C\] is                        [AIPMT (S) 2011]
  A)
   \[C-C<C=C<C-O<C-H\]
  done clear
  B)
   \[C-O<C-H<C-C<C=C\]
  done clear
  C)
   \[C-H<C-O<C-C<C=C\]
  done clear
  D)
   \[C-H<C=C<C-O<C-C\]
  done clear
  View Answer play_arrow

• question_answer53) Which of the following structures is the most preferred and hence of lowest energy for\[S{{O}_{3}}\]? [AIPMT (M) 2011]
  A)
                     
  done clear
  B)
    
  done clear
  C)
          
  done clear
  D)
         
  done clear
  View Answer play_arrow

• question_answer54) The pairs of species of oxygen and their magnetic behaviors are noted below. Which of the following presents the correct description?                                                                                                           [AIPMT (M) 2011]
  A)
   \[O_{2}^{-},O_{2}^{2-}-\]Both diamagnetic
  done clear
  B)
                  \[{{O}^{+}},\,O_{2}^{2-}-\]Both paramagnetic
  done clear
  C)
                 \[O_{2}^{+},\,{{O}_{2}}-\] Both paramagnetic
  done clear
  D)
   \[O_{{}}^{{}},O_{2}^{2-}-\]Both paramagnetic
  done clear
  View Answer play_arrow

• question_answer55) Which one of the following pairs is  isostructural (i.e., having the same shape and hybridization)? [AIPMT (S) 2012]
  A)
   \[[BC{{l}_{3}}\,\text{and}\,BrC{{l}_{3}}]\]
  done clear
  B)
        \[[N{{H}_{3}}\,\text{and}\,NO_{3}^{-}]\]
  done clear
  C)
   \[[N{{F}_{3}}\,\text{and}\,B{{F}_{3}}]\]
  done clear
  D)
        \[[BF_{4}^{-}\,\text{and}\,NH_{4}^{+}]\]
  done clear
  View Answer play_arrow

• question_answer56) Bond order of 1.5 is shown by                                                                  [AIPMT (S) 2012]
  A)
   \[O_{2}^{+}\]                       
  done clear
  B)
   \[O_{2}^{-}\] 
  done clear
  C)
   \[O_{2}^{2-}\]                       
  done clear
  D)
        \[O_{2}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer57) Which of the following species contains three bond pairs and one lone pair around the central atom? [AIPMT (S) 2012]
  A)
   \[{{H}_{2}}O\]           
  done clear
  B)
   \[B{{F}_{3}}\]
  done clear
  C)
   \[NH_{2}^{-}\]           
  done clear
  D)
        \[PC{{l}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer58) The pair of species with the same bond order is                                                                   [AIPMT (S) 2012]
  A)
   \[O_{2}^{2-},{{B}_{2}}\]      
  done clear
  B)
        \[O_{2}^{+},N{{O}^{+}}\] 
  done clear
  C)
   \[NO,CO\]        
  done clear
  D)
        \[{{N}_{2}},{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer59) During change of \[{{O}_{2}}\] to \[O_{2}^{-}\] ion, the electron adds on which one of the following orbitals?                                                                                                                                                [AIPMT (M) 2012]
  A)
  \[\overset{\text{*}}{\mathop{\text{ }\!\!\pi\!\!\text{ }}}\,\]orbital
  done clear
  B)
       \[\text{ }\!\!\pi\!\!\text{ }\]orbital 
  done clear
  C)
  \[\overset{\text{*}}{\mathop{\sigma }}\,\]orbital  
  done clear
  D)
       \[\overset{{}}{\mathop{\sigma }}\,\]
  done clear
  View Answer play_arrow

• question_answer60) 

  Four diatomic species are listed below.

  Identify the correct order in which the bond order is increasing in them.                                   [AIPMT (M) 2012]

  A)
   \[NO<O_{2}^{-}<C_{2}^{2-}<He_{2}^{+}\]
  done clear
  B)
   \[O_{2}^{-}<NO<C_{2}^{2-}<He_{2}^{+}\]
  done clear
  C)
   \[C_{2}^{2-}<He_{2}^{+}<O_{2}^{-}<NO\]
  done clear
  D)
   \[He_{2}^{+}<O_{2}^{-}<NO<C_{2}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer61) Dipole-induced dipole interactions are present in which of the following pairs?  [NEET 2013]
  A)
   \[{{H}_{2}}O\] and alcohol
  done clear
  B)
       \[C{{l}_{2}}\] and \[CC{{l}_{4}}\]
  done clear
  C)
   \[HCl\] and \[He\] atoms
  done clear
  D)
   \[Si{{F}_{4}}\] and \[He\]atoms
  done clear
  View Answer play_arrow

• question_answer62) Which   of   the   following   is paramagnetic?                                                                     [NEET 2013]
  A)
   \[CO\]            
  done clear
  B)
        \[O_{2}^{-}\]             
  done clear
  C)
   \[C{{N}^{-}}\]                       
  done clear
  D)
        \[N{{O}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer63) Identify the correct order of solubility in aqueous medium.                                                    [NEET 2013]
  A)
   \[CuS\,>\,Zn\,>\,N{{a}_{2}}S\]
  done clear
  B)
        \[ZnS\,>\,N{{a}_{2}}S\,\,>\,CuS\]
  done clear
  C)
   \[N{{a}_{2}}S\,\,>\,CuS\,>ZnS\]
  done clear
  D)
        \[N{{a}_{2}}S\,\,>\,ZnS\,>\,CuS\]
  done clear
  View Answer play_arrow

• question_answer64) \[Xe{{F}_{2}}\] is structural with                                                                                     [NEET 2013]
  A)
   \[Te{{F}_{2}}\]           
  done clear
  B)
        \[lCl_{2}^{-}\]
  done clear
  C)
   \[SbC{{l}_{3}}\]         
  done clear
  D)
        \[BaC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer65) Which one of the following molecules contain no \[\text{ }\!\!\pi\!\!\text{ -}\]bond?                             [NEET 2013]
  A)
   \[C{{O}_{2}}\]
  done clear
  B)
        \[{{H}_{2}}O\]           
  done clear
  C)
   \[S{{O}_{2}}\]            
  done clear
  D)
        \[N{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer66) Which of the following is a polar molecule?                                                                         [NEET 2013]
  A)
   \[B{{F}_{3}}\]            
  done clear
  B)
        \[S{{F}_{4}}\]
  done clear
  C)
   \[Si{{F}_{4}}\]            
  done clear
  D)
        \[Xe{{F}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer67) The radical because it has                                                                               [NEET 2013]
  A)
   6 p-orbitals and 6 unpaired electrons
  done clear
  B)
   7 p-orbitals and 6 unpaired electrons
  done clear
  C)
   7 p-orbitals and 7 unpaired electrons
  done clear
  D)
   6 p-orbitals and 7 unpaired electrons
  done clear
  View Answer play_arrow

• question_answer68) Which of the following molecules has the maximum dipole moment?                                            [AIPMT 2014]
  A)
   \[C{{O}_{2}}\]           
  done clear
  B)
        \[C{{H}_{4}}\]
  done clear
  C)
   \[N{{H}_{3}}\]           
  done clear
  D)
        \[N{{F}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer69) Which one of the following species has plane triangular shape?                                              [AIPMT 2014]
  A)
   \[{{N}_{3}}\]              
  done clear
  B)
        \[NO_{3}^{-}\]
  done clear
  C)
   \[N{{O}_{2}}\]           
  done clear
  D)
        \[C{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer70) Which of the following species contains equal number of \[\sigma \] and \[\pi \]-bonds?                         [NEET 2015 ]
  A)
   \[HCO_{3}^{-}\]        
  done clear
  B)
        \[Xe{{O}_{4}}\]          
  done clear
  C)
   \[{{(CN)}_{2}}\]         
  done clear
  D)
   \[C{{H}_{2}}{{(CN)}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer71) Which of the following pairs of ions are isoelectronic and isostructural?                                   [NEET 2015]
  A)
   \[CO_{3}^{2-},SO_{3}^{2-}\]           
  done clear
  B)
   \[ClO_{3}^{-},\,CO_{3}^{2-}\]
  done clear
  C)
   \[SO_{3}^{2-},NO_{3}^{-}\]        
  done clear
  D)
        \[ClO_{3}^{-},SO_{3}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer72) Which of the following options represents the correct bond order?                                           [NEET 2015 ]
  A)
   \[O_{2}^{-}>{{O}_{2}}>O_{2}^{+}\]   
  done clear
  B)
      \[O_{2}^{-}<{{O}_{2}}<O_{2}^{+}\]
  done clear
  C)
   \[O_{2}^{-}>{{O}_{2}}<O_{2}^{+}\]    
  done clear
  D)
        \[O_{2}^{-}<{{O}_{2}}>O_{2}^{+}\]
  done clear
  View Answer play_arrow

• question_answer73) Maximum bond angle at nitrogen is present in which of the following?                                                [NEET 2015 ]
  A)
   \[N{{O}_{2}}\]           
  done clear
  B)
        \[NO_{2}^{-}\]
  done clear
  C)
   \[NO_{2}^{+}\]   
  done clear
  D)
        \[NO_{3}^{-}\]
  done clear
  View Answer play_arrow

• question_answer74) The correct bond order in the following species is                                                                     [NEET 2015 ]
  A)
   \[O_{2}^{2+}>O_{2}^{+}>O_{2}^{-}\]  
  done clear
  B)
        \[O_{2}^{2+}<O_{2}^{-}<O_{2}^{+}\]
  done clear
  C)
   \[O_{2}^{+}>O_{2}^{-}<O_{2}^{2+}\]  
  done clear
  D)
       \[O_{2}^{-}<O_{2}^{+}>O_{2}^{2+}\]
  done clear
  View Answer play_arrow

• question_answer75) 

  The total number of \[\pi -\]bond electrons in the following structure is                                        [NEET 2015]

  A)
   4                    
  done clear
  B)
        8
  done clear
  C)
   12       
  done clear
  D)
        16
  done clear
  View Answer play_arrow

• question_answer76) .In which of the following pairs, both the species are not isostructural?                        [NEET 2015 (Re)]
  A)
   \[SiC{{l}_{4}},PCl_{4}^{+}\]        
  done clear
  B)
        Diamond, carbide
  done clear
  C)
   \[N{{H}_{3}},P{{H}_{3}}\]          
  done clear
  D)
        \[Xe{{F}_{4}},Xe{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer77) Decreasing order of stability of \[{{O}_{2}},O_{2}^{-},O_{2}^{+}\] and \[O_{2}^{2-}\]is          [NEET 2015 (Re)]
  A)
   \[O_{2}^{+}>{{O}_{2}}>O_{2}^{-}>O_{2}^{2-}\]
  done clear
  B)
        \[O_{2}^{2-}>O_{2}^{-}>{{O}_{2}}>O_{2}^{+}\]
  done clear
  C)
   \[{{O}_{2}}>O_{2}^{+}>O_{2}^{2-}>O_{2}^{-}\]
  done clear
  D)
        \[O_{2}^{-}>O_{2}^{2-}>O_{2}^{+}>{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer78) Consider the molecules \[C{{H}_{4}},N{{H}_{3}}\] and \[{{H}_{2}}O\]. Which of the given statements is false?       [NEET - 2016]
  A)
   The \[HCH\] bond angle in \[C{{H}_{4}},\] the \[HN\]bond angle in \[N{{H}_{3}},\] and the \[HOH\] bond angle in \[{{H}_{2}}O\] are all greater than \[{{90}^{o}}\]
  done clear
  B)
   The \[HOH\] bond angle in \[{{H}_{2}}O\] is larger than the \[HCH\] bond angle in \[C{{H}_{4}}\]
  done clear
  C)
   The \[HOH\] bond angle in \[{{H}_{2}}O\] is smaller than the x\[HNH\] bond angle in \[N{{H}_{3}}\]
  done clear
  D)
   The \[HCH\] bond angle in \[C{{H}_{4}}\] is larger than the \[HNH\] bond angle in \[N{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer79) Predict the correct order among the following:                                                         [NEET - 2016]
  A)
   lone pair- lone pair > lone pair - bond pair bond pair - bond pair
  done clear
  B)
   lone pair - lone pair > bond pair - bond pair lone pair - bond pair
  done clear
  C)
   bond pair - bond pair > lone pair - bond  pair lone pair - lone pair
  done clear
  D)
   lone pair - bond pair > bond pair - bond pair lone pair - lone pair
  done clear
  View Answer play_arrow

• question_answer80) 

  Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.                                                                                                                                                  [NEET - 2016]

  Column-I		Column -II
  [a]	\[Xe{{F}_{6}}\]	(i)	Distorted octahedral
  [b]	\[Xe{{O}_{3}}\]	(ii)	Square planar
  [c]	\[XeO{{F}_{4}}\]	(iii)	Pyramidal
  [d]	\[Xe{{F}_{4}}\]	(iv)	Square pyramidal

  Code :-
  A)

  [a]

  (i)

  (iii)

  (iv)

  (ii)

  done clear
  B)

  [b]

  (i)

  (ii)

  (iv)

  (iii)

  done clear
  C)

  [c]

  (iv)

  (iii)

  (i)

  (ii)

  done clear
  D)

  [d]

  (iv)

  (i)

  (ii)

  (iii)

  done clear
  View Answer play_arrow

• question_answer81) The pair of electron in the given carbanion, \[C{{H}_{3}}C\equiv {{C}^{\,O-}},\] is present in which of the following orbitals?                                                                                                                                     [NEET - 2016]
  A)
   2p       
  done clear
  B)
                    \[s{{p}^{3}}\]
  done clear
  C)
   \[s{{p}^{2}}\]            
  done clear
  D)
        sp
  done clear
  View Answer play_arrow

• question_answer82) Which of the following pairs of compounds is isoelectronic and isostructural?   [NEET-2017]
  A)
   \[I{{F}_{3}},Xe{{F}_{2}}\]     
  done clear
  B)
        \[BeC{{l}_{2}},Xe{{F}_{2}}\]
  done clear
  C)
   \[Te{{l}_{2}},Xe{{F}_{2}}\]   
  done clear
  D)
        \[IBr_{2}^{-},Xe{{F}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer83) 

  Match the interhalogen compounds of column I with the geometry in column II and assign the correct code [NEET-2017]
  	Column-I		Column -II
  	[a]	\[XX'\]	(i)	T-shape
  	[b]	\[XX_{3}^{'}\]	(ii)	Pentagonal bipyramidal
  	[c]	\[XX_{5}^{'}\]	(iii)	Linear
  	[d]	\[XX_{7}^{'}\]	(iv)	Square-pyramidal
  			(v)	Tetrahedral

  Code:
  A)

  [a]

  (iv)

  (iii)

  (ii)

  (i)

  done clear
  B)

  [b]

  (iii)

  (iv)

  (i)

  (ii)

  done clear
  C)

  [c]

  (iii)

  (i)

  (iv)

  (ii)

  done clear
  D)

  [d]

  (v)

  (iv)

  (iii)

  (ii)

  done clear
  View Answer play_arrow

• question_answer84) The species, having bond angles of \[{{120}^{o}}\] is                                                       [NEET-2017]
  A)
   \[BC{{l}_{3}}\]
  done clear
  B)
                    \[P{{H}_{3}}\]
  done clear
  C)
   \[CI{{F}_{3}}\]                       
  done clear
  D)
        \[NC{{l}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer85) Which one of the following pairs of species have the same bond order?                                               [NEET-2017]
  A)
   \[{{N}_{2}}O_{2}^{-}\]         
  done clear
  B)
        \[CO,NO\]
  done clear
  C)
   \[{{O}_{2}},N{{O}^{+}}\]   
  done clear
  D)
        \[C{{N}^{-}},CO\]
  done clear
  View Answer play_arrow

• question_answer86) In the structure of \[\text{Cl}{{\text{F}}_{\text{3}}}\], the number of lone pair of electrons on central atom \[\text{ }\!\!'\!\!\text{ Cl }\!\!'\!\!\text{ }\] is                                                                               [NEET - 2018]
  A)
   Four   
  done clear
  B)
        Two
  done clear
  C)
   One               
  done clear
  D)
        Three
  done clear
  View Answer play_arrow

• question_answer87) Which of the following molecules represents the order of hybridisation \[\text{s}{{\text{p}}^{\text{2}}}\text{, s}{{\text{p}}^{\text{2}}}\text{, sp, sp}\]from left to right atoms?                           [NEET - 2018]
  A)
   \[\text{C}{{\text{H}}_{\text{2}}}\text{=CH-CH=C}{{\text{H}}_{\text{2}}}\]
  done clear
  B)
   \[\text{C}{{\text{H}}_{\text{2}}}\text{=CH-C}\equiv \text{CH}\]
  done clear
  C)
   \[\text{HC}\equiv \text{C-C}\equiv \text{CH}\]
  done clear
  D)
   \[\text{C}{{\text{H}}_{\text{3}}}\text{-CH=CH-C}{{\text{H}}_{\text{3}}}\]
  done clear
  View Answer play_arrow

• question_answer88) 

  Consider the following species :

  \[\text{C}{{\text{N}}^{\text{+}}}\text{, C}{{\text{N}}^{\text{--}}}\text{, NO and CN}\]

  Which one of these will have the highest bond order?                                                          [NEET - 2018]

  A)
   \[\text{C}{{\text{N}}^{\text{+}}}\]          
  done clear
  B)
        \[\text{C}{{\text{N}}^{\text{--}}}\]
  done clear
  C)
   NO                
  done clear
  D)
        CN
  done clear
  View Answer play_arrow

• question_answer89) Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is   \[1{{s}^{2}}\text{ }2{{s}^{2}}\text{ }2{{p}^{3}}\], the simplest formula for this compound is                                                                                                                                                              [NEET - 2018]
  A)
   \[\text{M}{{\text{g}}_{\text{2}}}\text{X}\]
  done clear
  B)
        \[\text{Mg}{{\text{X}}_{2}}\]
  done clear
  C)
   \[\text{M}{{\text{g}}_{2}}{{\text{X}}_{3}}\]       
  done clear
  D)
        \[\text{M}{{\text{g}}_{3}}{{\text{X}}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer90) Which of the following diatomic molecular species has only \[\pi \] bonds according to Molecular Orbital Theory?                                                                                                                               [NEET 2019]
  A)
   \[{{C}_{2}}\]              
  done clear
  B)
        \[B{{e}_{2}}\]
  done clear
  C)
   \[{{O}_{2}}\]              
  done clear
  D)
        \[{{N}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer91) Which of the following set of molecules will have zero dipole moment?                       [NEET 2020]
  A)
   Boron trifluoride, hydrogen fluoride, carbon dioxide, 1, 3-dichlorobenzene
  done clear
  B)
   Nitrogen trifluoride, beryllium difluoride, water, 1, 3-dichlorobenzene
  done clear
  C)
   Boron trifluoride, beryllium difluoride, carbon dioxide, 1, 4-dichlorobenzene
  done clear
  D)
   Ammonia, beryllium difluoride, water, 1, 4-dichlorobenzene
  done clear
  View Answer play_arrow

• question_answer92) Identify a molecule which does not exist.                                                                            [NEET 2020]
  A)
   \[L{{i}_{2}}\]             
  done clear
  B)
        \[{{C}_{2}}\]
  done clear
  C)
   \[{{O}_{2}}\]              
  done clear
  D)
        \[H{{e}_{2}}\]
  done clear
  View Answer play_arrow