Solved papers for NEET Chemistry Structure of Atom / परमाणु संरचना NEET PYQ-Structure of Atom

done NEET PYQ-Structure of Atom Total Questions - 54

• question_answer1) Bohr radius for the hydrogen atom \[(n=1)\] is approximately \[0.530\,\overset{o}{\mathop{A}}\,\]. The radius for the first excited state \[(n=2)\] orbit is (in \[\overset{o}{\mathop{A}}\,\]):                             [AIPMT 1998]
  A)
   0.13 
  done clear
  B)
                    1.06                
  done clear
  C)
  4.77  
  done clear
  D)
   2.12
  done clear
  View Answer play_arrow

• question_answer2) The position of both, an electron and a helium atom is known within 1.0 mm. Further the momentum of the election is known within \[5.0\times {{10}^{-26}}\,kg\,m{{s}^{-1}}\]. The minimum uncertainty in the measurement of the momentum of the helium atom is:                                     [AIPMT 1998]
  A)
   \[50\,kg\,m{{s}^{-1}}\]           
  done clear
  B)
        \[80\,kg\,m{{s}^{-1}}\]
  done clear
  C)
   \[80\times {{10}^{-26}}\,kg\,m{{s}^{-1}}\]    
  done clear
  D)
   \[5.0\times {{10}^{-26}}\,kg\,m{{s}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer3) Which one is not paramagnetic among the following?  [Atomic number: \[Be=4,\text{ }Ne=10,\text{ }As=33,\,\,~Cl=17\]]  [AIPMT 1998]
  A)
               \[C{{l}^{-}}\]
  done clear
  B)
                    Be
  done clear
  C)
   \[N{{e}^{2+}}\]
  done clear
  D)
                    \[A{{s}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer4) Which of the following configuration is correct for iron?                                          [AIPMT 1999]
  A)
   \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}\]  
  done clear
  B)
   \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }4{{s}^{2}}3{{d}^{5}}\]
  done clear
  C)
   \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }4{{s}^{2}}3{{d}^{7}}\]
  done clear
  D)
   \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }3{{d}^{6}},\text{ }4{{s}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer5) Which of the following has more unpaired d-electrons?                               [AIPMT 1999]
  A)
   \[Z{{n}^{+}}\]                      
  done clear
  B)
        \[F{{e}^{2+}}\]

  done clear C)  \[~{{N}^{3+}}\]                    done clear D)       \[C{{u}^{+}}\] done clear View Answer play_arrow question_answer6) The uncertainty in momentum of an electron is\[1\times {{10}^{-5}}\,m/s\]. The uncertainty in its position will be \[(h=6.62\times {{10}^{-34}}\,kg\,{{m}^{2}}/s)\]:    [AIPMT 1999] A)  \[1.05\times {{10}^{-28}}\,m\] done clear B)       \[1.05\times {{10}^{-26}}\,m\] done clear C)  \[5.27\times {{10}^{-30}}\,m\] done clear D)       \[5.25\times {{10}^{-28}}\,m\] done clear View Answer play_arrow question_answer7) Who modified Bohr's theory by introducing elliptical orbits for electron path?  [AIPMT 1999] A)  Hund     done clear B) Thomson done clear C)      Rutherford done clear D) Sommerfeld done clear View Answer play_arrow question_answer8) The de-Broglie wavelength of a particle with mass 1 g and velocity 100 m/s is:         [AIPMT 1999] A)  \[6.63\times {{10}^{-33}}\,m\] done clear B)       \[6.63\times {{10}^{-34}}\,m\] done clear C)  \[6.63\times {{10}^{-35}}\,m\] done clear D)       \[6.65\times {{10}^{-36}}\,m\] done clear View Answer play_arrow question_answer9) The energy of photon is given as: \[\Delta e\]/atom \[=3.03\times {{10}^{-19}}\,J\,ato{{m}^{-1}}\] then, the wavelength \[(\lambda )\]  of the photon is:                           [AIPMT 2000] A)  6.56 nm done clear B) 65.6 nm done clear C)  656 nm done clear D)  0.656 nm done clear View Answer play_arrow question_answer10) Among    die    following    groupings   which represents    the    collection    of   isoelectronic species?    [AIPMT 2000] A)  \[NO,\,C{{N}^{-}},\,{{N}_{2}},\,O_{2}^{-}\] done clear B)       \[N{{O}^{+}},\,C_{2}^{2-},\,O_{2}^{-},\,CO\] done clear C)  \[{{N}_{2}},\,C_{2}^{2-},\,CO,\,NO\] done clear D)       \[CO,\,N{{O}^{+}},\,C{{N}^{-}},\,C_{2}^{2-}\] done clear View Answer play_arrow question_answer11)  The following quantum numbers are possible for how many orbital \[n=3,\,\,1=2,\text{ }m=+2:\]       [AIPMT 2001] A)  1         done clear B)                   2                     done clear C)  3         done clear D)                   4 done clear View Answer play_arrow question_answer12) In hydrogen atom, energy of first excited state is -3.4 eV. Then KE of same orbit of hydrogen atom:      [AIPMT 2002] A)        + 3.4 eV       done clear B) + 6.8 eV done clear C)  – 13.6 eV done clear D) + 13.6 eV done clear View Answer play_arrow question_answer13) General electronic configuration of lanthanides are:                                                [AIPMT 2002] A)  \[(n-2){{f}^{1-14}}(n-1){{s}^{2}}{{p}^{6}}{{d}^{0-1}}n{{s}^{2}}\] done clear B)       \[(n-2){{f}^{10-14}}(n-1){{d}^{0-1}}n{{s}^{2}}\] done clear C)  \[(n-2){{f}^{0-14}}(n-1){{d}^{10}}n{{s}^{2}}\]        done clear D)       \[(n-2){{d}^{0-1}}(n-1){{f}^{1-14}}n{{s}^{2}}\] done clear View Answer play_arrow question_answer14) Which of the following is iso-electronic?                                                                              [AIPMT 2002] A)        \[C{{O}_{2}},\text{ }N{{O}_{2}}\]      done clear B)       \[NO_{2}^{-},\,C{{O}_{2}}\] done clear C)  \[C{{N}^{-}},\text{ }CO\]       done clear D)       \[S{{O}_{2}},\,C{{O}_{2}}\] done clear View Answer play_arrow question_answer15) The value of Planck's constant is \[6.63\times {{10}^{-34}}Js\]. The velocity of light is \[3.0\times {{10}^{8}}m{{s}^{-1}}\]. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of \[8\times {{10}^{15}}{{s}^{-1}}\]?                            [AIPMT 2003] A)              \[4\times {{10}^{1}}\] done clear B)                   \[3\times {{10}^{7}}\] done clear C)  \[2\times {{10}^{-25}}\] done clear D)       \[5\times {{10}^{-18}}\] done clear View Answer play_arrow question_answer16) The frequency of radiation emitted when the electron falls from \[n=4\] to \[n=1\] in a hydrogen atom will be (Given ionisation energy of \[H=2.18\,\,{{10}^{-18}}J\,ato{{m}^{-1}}\] and \[h=6.625\times {{10}^{-34}}Js):\]                                      [AIPMT (S) 2004] A)  \[1.54\times l{{0}^{15}}\text{ }{{s}^{-1}}\] done clear B)       \[1.03\times {{10}^{15}}\,\,{{s}^{-1}}\] done clear C)  \[3.08\times {{10}^{15}}\text{ }{{s}^{-1}}\] done clear D)       \[2.00\times {{10}^{15}}\text{ }{{s}^{-1}}\] done clear View Answer play_arrow question_answer17) The energy of second Bohr orbit of the hydrogen atom is \[\text{ }328\text{ }kJ\text{ }mo{{l}^{-1}};\] hence the energy of fourth Bohr orbit would be:                                                                      [AIPMT (S) 2005] A)  \[-\,41\text{ }kJ\text{ }mo{{l}^{-1}}\]  done clear B)  \[-\,1312\text{ }kJ\text{ }mo{{l}^{-1}}\] done clear C)  \[-\,164\text{ }kJ\text{ }mo{{l}^{-1}}\] done clear D)       \[-\,82\text{ }kJ\text{ }mo{{l}^{-1}}\] done clear View Answer play_arrow question_answer18) Given:   The mass of electron is \[9.11\times {{10}^{-31}}kg\] Planck constant is \[6.626\times {{10}^{-34}}Js\], the uncertainty involved in the measurement of velocity within a distance of \[0.1\,\,\overset{o}{\mathop{A}}\,\] is :                                                                                                                                               [AIPMT (S) 2006] A) \[5.79\times {{10}^{6}}m{{s}^{-1}}\] done clear B)  \[5.79\times {{10}^{{}}}m{{s}^{-1}}\] done clear C)  \[5.79\times {{10}^{8}}m{{s}^{-1}}\] done clear D)       \[5.79\times {{10}^{5}}m{{s}^{-1}}\] done clear View Answer play_arrow question_answer19) The orientation of an atomic orbital is governed by:                              [AIPMT (S) 2006] A)  azimuthal quantum number                     done clear B)       spin quantum number done clear C)  magnetic quantum number done clear D)       principal quantum number done clear View Answer play_arrow question_answer20)  Consider die following sets of quantum numbers:                                                     [AIPMT (S) 2007]                         \[n\]      \[l\]       \[m\]        \[s\]             (i)         3          0          0          \[+1/2\]             (ii)         2          2          1          \[+1/2\]             (iii)        4          3          – 2        \[-1/2\]             (iv)        1          0          – 1        \[-1/2\]             (v)        3          2          3          \[+1/2\]             Which of the following sets of quantum number is not possible? A)  ii, iii and iv done clear B)  i, ii, iii and iv     done clear C)  ii, iv and v done clear D)     i and iii done clear View Answer play_arrow question_answer21) If uncertainty in position and momentum are equal, then uncertainty in velocity is                   [AIPMT (S) 2008] A)  \[\frac{1}{2m}\sqrt{\frac{h}{\pi }}\] done clear B)       \[\sqrt{\frac{h}{2\pi }}\] done clear C)  \[\frac{1}{m}\sqrt{\frac{h}{\pi }}\]        done clear D)       \[\sqrt{\frac{h}{\pi }}\] done clear View Answer play_arrow question_answer22) The measurement of the electron position is associated with an uncertainty in momentum, which is equal to \[1\times {{10}^{-18}}g\,cm\,{{s}^{-1}}\]. The uncertainty in electron velocity is, (mass of an electron is \[9\times {{10}^{-28}}g\])          [AIPMT (S) 2008] A)  \[1\times {{10}^{9}}cm\,{{s}^{-1}}\] done clear B)  \[1\times {{10}^{6}}cm\,{{s}^{-1}}\] done clear C)  \[1\times {{10}^{5}}cm\,{{s}^{-1}}\] done clear D)       \[1\times {{10}^{11}}cm\,{{s}^{-1}}\] done clear View Answer play_arrow question_answer23) Maximum number of electrons in a subshell of, an atom is determined by the following            [AIPMT (S) 2009] A)  \[4\,l+2\]    done clear B)  \[2\,l+1\] done clear C)  \[4\,l-2\]         done clear D)  \[2\,{{n}^{2}}\] done clear View Answer play_arrow question_answer24) Which of the following is not permissible arrangement of electrons in an atom?                        [AIPMT (S) 2009] A)  \[n=4,\,l=0,\,m=0,\,s=-1/2\] done clear B)    \[n=5,\,l=3,\,m=0,\,s=+1/2\] done clear C)  \[n=3,\,l=2,\,m=-3,\,s=-1/2\] done clear D)  \[n=3,\,l=2,\,m=-2,\,s=-1/2\] done clear View Answer play_arrow question_answer25)  Which one of the following ions has electronic configuration\[[Ar]\text{ }3{{d}^{6}}\]? (At. no: Mn = 25, Fe = 26, Co = 27, Ni = 28)                                                                  [AIPMT (S) 2010] A)  \[N{{i}^{3+}}\]          done clear B)  \[M{{n}^{3+}}\]        done clear C)  \[F{{e}^{3+}}\]          done clear D)       \[C{{o}^{3+}}\] done clear View Answer play_arrow question_answer26) A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be\[(h=6.6\times {{10}^{-34}}Js)\]     [AIPMT (M) 2010] A)  \[6.6\times {{10}^{-32}}m\]     done clear B)  \[6.6\times {{10}^{-34}}m\]     done clear C)  \[1.0\times {{10}^{-35}}m\]     done clear D)       \[1.0\times {{10}^{-32}}m\] done clear View Answer play_arrow question_answer27) The total number of atomic orbitals in fourth energy level of an atom is                                             [AIPMT (S) 2011] A) 16   done clear B)  32                    done clear C)  4        done clear D)  8 done clear View Answer play_arrow question_answer28) The energies \[{{E}_{1}}\] and \[{{E}_{2}}\] of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., \[{{\lambda }_{1}}\] and \[{{\lambda }_{2}}\]will be                               [AIPMT (S) 2011] A)  \[{{\lambda }_{1}}=2{{\lambda }_{2}}\]          done clear B)       \[{{\lambda }_{1}}=4{{\lambda }_{2}}\]          done clear C)  \[{{\lambda }_{1}}=\frac{1}{2}{{\lambda }_{2}}\]       done clear D)       \[{{\lambda }_{1}}={{\lambda }_{2}}\] done clear View Answer play_arrow question_answer29) If \[n=6,\] the correct sequence for filling of electrons will be                                                 [AIPMT (S) 2011] A)  \[ns\xrightarrow[{}]{{}}(n-1)d\xrightarrow[{}]{{}}(n-2)f\xrightarrow[{}]{{}}np\] done clear B)  \[ns-(n-2)f\xrightarrow[{}]{{}}np\xrightarrow[{}]{{}}(n-1)d\] done clear C)  \[ns-np\xrightarrow[{}]{{}}(n-1)d\xrightarrow[{}]{{}}(n-2)f\] done clear D)  \[ns\xrightarrow[{}]{{}}(n-2)f\xrightarrow[{}]{{}}(n-1)d\xrightarrow[{}]{{}}np\] done clear View Answer play_arrow question_answer30)  According to the Bohr theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?                                                                                                                          [AIPMT (M) 2011] A)  \[n=6\] to \[n=1\] done clear B)       \[n=5\] to \[n=4\] done clear C)  \[n=6\] to \[n=5\]          done clear D)  \[n=5\] to \[n=3\] done clear View Answer play_arrow question_answer31) Maximum number of electrons in a sub shell with \[l=3\] and \[n=4\] is                                  [AIPMT (S) 2012] A)  14          done clear B)  16                    done clear C)  10        done clear D)  12 done clear View Answer play_arrow question_answer32) The correct set of four quantum numbers for the valence electron of rubidium atom \[(Z=37)\]is            [AIPMT (S) 2012] A)  \[5,1,1,+\frac{1}{2}\]   done clear B)       \[6,0,0,+\frac{1}{2}\]   done clear C)  \[5,0,0,+\frac{1}{2}\] done clear D)       \[5,1,0,+\frac{1}{2}\] done clear View Answer play_arrow question_answer33) The orbital angular momentum of p-electron is given as                                   [AIPMT (M) 2012]    A)  \[\frac{h}{\sqrt{2\pi }}\] done clear B)  \[\sqrt{3}\frac{h}{2\pi }\] done clear C)  \[\sqrt{\frac{3}{2}}\frac{h}{\pi }\]         done clear D)  \[\sqrt{6}.\frac{h}{2\pi }\] done clear View Answer play_arrow question_answer34) The value of Planck's constant is \[6.63\times {{10}^{-34}}Js\]. The speed of light is \[3\times {{10}^{17}}nm{{s}^{-1}}\]. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of \[6\times {{10}^{15}}{{s}^{-1}}\]?                                                                                       [NEET 2013] A)  10                                done clear B)  25                    done clear C)  50                    done clear D)  75 done clear View Answer play_arrow question_answer35) What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? \[n=3,l=1\] and \[m=-1\]                                                                                                                        [NEET 2013] A)  10          done clear B)  6                     done clear C)  4        done clear D)  2 done clear View Answer play_arrow question_answer36) Based on equation \[E=-2.178\times {{10}^{-18}}J\left( \frac{{{Z}^{2}}}{{{n}^{2}}} \right)\]certain con-elusions are written. Which of them is not correct?                                                                                            [NEET 2013] A)  The negative sign in equation simply means that the energy of electron bound to the nucleus is lower than it would be if the electrons were at the infinite distance from the nucleus done clear B)  Larger the value of n, the larger is the orbit radius done clear C)  Equation can be used to calculate the change in energy when the electron changes orbit done clear D)  For \[n=1\] the electron has a more negative energy than it does for \[n=6\] which means that the electron is more done clear View Answer play_arrow question_answer37)  Which of the following lanthanides ions is diamagnetic?                                                                    [NEET 2013] (At. nos. Ce = 58, Sm = 62, Eu = 63, Yb=70) A)  \[C{{e}^{2+}}\]         done clear B)       \[S{{m}^{2+}}\] done clear C)  \[E{{u}^{2+}}\]         done clear D)       \[Y{{b}^{2+}}\] done clear View Answer play_arrow question_answer38)  What is the maximum number of orbitals that can be identified with the following quantum numbers?    [AIPMT 2014] \[n=3,l=1,{{m}_{l}}=0\] A)  1         done clear B)  2 done clear C)  3                     done clear D)       4 done clear View Answer play_arrow question_answer39) Calculate the energy in joule corresponding to light of wavelength 45 nm : (Planck's constant \[h=6.63\times {{10}^{-34}}\] is;   speed   of   light\[c=3\times {{10}^{8}}m{{s}^{-1}})\]                                                   [AIPMT 2014] A)  \[6.67\times {{10}^{15}}\]        done clear B)       \[6.67\times {{10}^{11}}\] done clear C)  \[4.42\times {{10}^{-15}}\]        done clear D)       \[4.42\times {{10}^{-18}}\] done clear View Answer play_arrow question_answer40) \[B{{e}^{2+}}\] is isoelectronic with which of the following ions?                                          [AIPMT 2014] A)  \[{{H}^{+}}\]                        done clear B)       \[L{{i}^{+}}\] done clear C)  \[N{{a}^{+}}\]              done clear D)  \[M{{g}^{2+}}\] done clear View Answer play_arrow question_answer41) Magnetic moment 2.83 BM is given by which of the following ions?             (At. No. : Ti = 22; Cr = 24; Mn = 25; Ni = 28)                                                    [AIPMT 2014] A)  \[T{{i}^{3+}}\]         done clear B)  \[N{{i}^{2+}}\] done clear C)  \[C{{r}^{3+}}\]                                  done clear D)  \[M{{n}^{2+}}\] done clear View Answer play_arrow question_answer42) Magnetic moment 2.84 BM is given by (At. no. Ni = 28, Ti = 22, Cr = 24, Co = 27)                        [NEET 2015 ] A)  \[N{{i}^{2+}}\]                      done clear B)       \[T{{i}^{3+}}\] done clear C)  \[C{{r}^{3+}}\]                      done clear D)  \[C{{O}^{2+}}\] done clear View Answer play_arrow question_answer43) The number of d-electrons in \[F{{e}^{2+}}\,(Z=26)\] is not equal to the number of electrons in which one of the following?                                                                                                                                                [NEET 2015 ] A)  s-electrons in \[Mg(Z=12)\] done clear B)  p-electrons in \[Cl\text{ }(Z=17)\] done clear C)  d-electrons in \[Fe(Z=26)\] done clear D)  p-electrons in \[Ne(Z=10)\] done clear View Answer play_arrow question_answer44) The angular momentum of electrons in d orbital is equal to                                                   [NEET 2015 ] A)  \[\sqrt{6}h\]    done clear B)  \[\sqrt{2}h\]      done clear C)  \[2\sqrt{3}h\]      done clear D)   \[0h\] done clear View Answer play_arrow question_answer45) Gadolinium belongs to \[4f\] series. Ifs atomic number is 64. Which of the following is the correct   electronic   configuration   of gadolinium?                                                                                                       [NEET 2015 (Re)] A)  \[[Xe]4{{f}^{8}}6{{d}^{2}}\]            done clear B)       \[[Xe]4{{f}^{9}}\,5{{s}^{1}}\] done clear C)  \[[Xe]4{{f}^{7}}\,5{{d}^{1}}\,6{{s}^{2}}\]  done clear D)       \[[Xe]\,4{{f}^{6}}5{{d}^{2}}6{{s}^{2}}\] done clear View Answer play_arrow question_answer46) Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?        [NEET 2015 (Re)] A)  \[3s\text{ }4s\text{ }3p\text{ }3d\] done clear B)       \[4s\text{ }3s\text{ }3p\text{ }3d\] done clear C)  \[3s\text{ }3p\text{ }3d\text{ }4s\]    done clear D)     \[3s\text{ }3p\text{ }4s\text{ }3d\] done clear View Answer play_arrow question_answer47) The electronic configurations of Eu(Atomic No 63), Gd(Atomic No 64) and Tb(Atomic No. 65) are        [NEET - 2016] A) \[[Xe]4{{f}^{7}}6{{s}^{2}},\text{}[Xe]4{{f}^{8}}\text{}6{{s}^{2}}\]and\[[Xe]4{{f}^{8}}5{{d}^{1}}6{{s}^{2}}\] done clear B)  \[[Xe]4{{f}^{7}}5{{d}^{1}}6{{s}^{2}},\text{}[Xe]4{{f}^{7}}\text{}5{{d}^{1}}\text{ }6{{s}^{2}}\] and \[[Xe]4{{f}^{9}}6{{s}^{2}}\] done clear C) \[[Xe]4{{f}^{6}}5{{d}^{1}}6{{s}^{2}},\text{}[Xe]4{{f}^{7}}5d16{{s}^{2}}\]and\[[Xe]4{{f}^{8}}5{{d}^{1}}6{{s}^{2}}\] done clear D)  \[[Xe]4{{f}^{7}}6{{s}^{2}},\text{ }[Xe]4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\]and \[[Xe]4{{f}^{9}}6{{s}^{2}}\] done clear View Answer play_arrow question_answer48) Two electrons occupying the same orbital are distinguished by                                                    [NEET - 2016] A)  Principal quantum number done clear B)  Magnetic quantum number done clear C)  Azimuthal quantum number done clear D)  Spin quantum number done clear View Answer play_arrow question_answer49) Which one is the wrong statement?                                                                                                [NEET-2017] A)  The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms done clear B)  de-Broglie's wavelength is given by \[\lambda =\frac{h}{mv},\] where m = mass of the particle, v = group velocity of the particle done clear C)  The uncertainty principle is \[\Delta E\times \Delta t\ge \frac{h}{4\pi }\] done clear D)  Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement done clear View Answer play_arrow question_answer50)  Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code:                                                                                   [NEET - 2018] Column I Column II a. \[\text{C}{{\text{o}}^{\text{3+}}}\] i. \[\sqrt{\text{8}}\text{ BM}\] b. \[\text{C}{{\text{r}}^{\text{3+}}}\] ii. \[\sqrt{35}\text{ }BM\] c. \[\text{F}{{\text{e}}^{\text{3+}}}\] iii. \[\sqrt{3}\text{ }BM\] d. \[\text{N}{{\text{i}}^{\text{2+}}}\] iv. \[\sqrt{24}\text{ }BM\] v. \[\sqrt{15}\text{ }BM\] A) a-iv      b-i        c-ii       d-iii done clear B) a-I        b-ii       c-iii      d-iv done clear C) a-iv      b-v       c-ii       d-i done clear D) a-iii      b-v       c-I        d-ii done clear View Answer play_arrow question_answer51) Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?        [NEET 2019] A)  Paschen series done clear B)       Brackett series done clear C)  Lyman series done clear D)       Balmer series done clear View Answer play_arrow question_answer52) 4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is: [NEET 2019] A)  6p > 5f > 4d > 5p done clear B)       5f > 6p > 4d > 5p done clear C)  5f > 6p > 5p > 4d        done clear D)  6p > 5f > 5p > 4d done clear View Answer play_arrow question_answer53) The calculated spin only magnetic moment of \[C{{r}^{2+}}\] ion is                                  [NEET 2020] A)  4.90 BM           done clear B)       5.92 BM done clear C)  2.84 BM           done clear D)       3.87 BM done clear View Answer play_arrow question_answer54) The number of protons, neutrons and electrons in \[_{\,\,71}^{175}Lu\], respectively, are                  [NEET 2020] A)  104, 71 and 71 done clear B)       71, 71 and 104 done clear C)  175, 104 and 71 done clear D)       71, 104 and 71 done clear View Answer play_arrow Study Package NEET PYQ-Structure of Atom   Buy Now     Please Wait you are being redirected.... You need to login to perform this action. You will be redirected in 3 sec × Reset Password. 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