Structure of Atom NEET Test Series Leave a Comment / CHEMISTRY MOCKTEST NEET / By admin 4 Sorry! Time up Structure of Atom - NEET (Chemistry) Learn more! Practice more! Score more!Best of Luck! 1 / 50 The specific charge on an electron is 5.27 C/kg 5.27 e.s.u./g 1.758 x 10^{11} C/g 5.27 x 10^{17} e.s.u./g 1 2 3 4 2 / 50 The energy of a photon having a wavelength of 0.5Å would be3.98 x 10-15 J5.75 x 10-16 J5.25 x 10-18 J9 x 10-16 J 1 2 3 4 3 / 50 Which one is correct regarding the photoelectric effect? 1 2 3 4 4 / 50 The energy of an electron in the 5th orbit of the H-atom is -13.6 eV -5.40 eV -0.54 eV -0.85 eV 5 / 50 According to Bohr's atomic theory, which of the following is correct? Time Period α n^{4}/Z^{2}K.E. of e^{-} α Z^{2}/n^{2}T.E. α Z/n Frequency of revolution α Z^{2}/n^{4} 1 2 3 4 6 / 50 The intensity of spectral lines depends upon Frequency of photon emitted Wavelength of photon absorbed. Frequency of photon absorbed. Number of photons of same frequency absorbed or emitted 7 / 50 An electron in H-atom jumps from the nth orbit to the 3rd orbit. If three spectral lines are possible for the transition, the value of n is 4 5 7 6 8 / 50 Which of the following is correct? 1 2 3 4 9 / 50 Uncertainty in the position of an electron is 'x' m and uncertainty in its velocity is 5.72 x 10^{7} x m/s then the value of x will be1.012 x 10^{-10}1.012 x 10^{-12}2.052 x 10^{-8}3.012 x 10^{-12} 1 2 3 4 10 / 50 Correct relationship regarding de Broglie's hypothesis. 1 2 3 4 11 / 50 The correct set of 4 quantum numbers of a 4d electron is 4, 2, 1,+1/2 4, 3.2, +1/2 4,3,-2,+ 1/2 4, 1, 1, +1/2 12 / 50 How many exchanges are possible for the d electrons present in vanadium [atomic no. 23] atom? 0 1 2 3 13 / 50 Which of the following has a maximum number of unpaired electrons?CaCs^{-}Fe^{2+}Zn^{2+} 1 2 3 4 14 / 50 Which is correct regarding wavefunction for 2p-orbital and distance from the nucleus? The wavefunction continuously decreases with increase of distance The wavefunction decreases and becomes -ve with distance The wavefunction increases with distance, attains a maximum value and then decreases The wavefunction increases with distance 15 / 50 The energy of a photon is 2 x 10^{-15} x J Its wavelength will be nearly equal to100Å10Å1Å1000Å 1 2 3 4 16 / 50 At low pressure there is enough space between gaseous atoms of He so that ions can accelerate to such a high speed that when they strike another atom it can eject electrons of it, creating more Electron and protons Positive ions and electrons Positrons and neutrino Positron and proton 17 / 50 A light of frequency 10^{16} Hz is irradiated on a metal surface with threshold frequency equal to 5 x 10^{15} Hz What would be the maximum kinetic energy of photoelectrons emitted?3.313 x 10^{-15} J3.313 x 10^{-18} J1.02 x 10^{16} J4.316 x 10^{-18} J 1 2 3 4 18 / 50 An electron is moving in nth orbit of radius 2.3758Å in He^{+} ion. Energy required to remove electron from this orbit of He^{+} is 6.04ev 5.45eV 54.4eV 6.025J 19 / 50 Which of the following is correct? 1 2 3 4 20 / 50 Maximum number of spectral lines possible if electron is present in 4th shell and only two atoms are present in sample would be 2 4 3 5 21 / 50 Splitting of a spectral line in presence of magnetic field is known as Stark effect Zeeman effect Photoelectric effect Heisenberg uncertainty principle 22 / 50 How many electrons in Argon atom have m_{l} =1 1 6 4 2 23 / 50 How many electrons in sodium atom have m_{l} = 0? 4 5 6 7 24 / 50 Which one of the following sets is correct? n=1, l=1, m=0, s=+1/2 n=2, l=1, m=0, s=-1/2 n=2, l=0, m=3, s=+1/2 n=4, l=2, m=4, s=-1/2 25 / 50 Possible ways of exchange for d^{5} is 5 4 10 16 26 / 50 This graph is for 1s 2s 2p 3s 27 / 50 The magnetic moment of an ion M^{3+} is 5.92BM. The number of electrons in the d-orbital of M will be 4 5 6 3 28 / 50 A metal surface in 2 experiments is irradiated by 2-radiations of frequencies v_{1} and v_{2}. If v_{1} = 2v_{2} then what is the correct relationship between the work function of metal in both experiments?hv_{01} > hv_{02}hv_{01} < hv_{02}hv_{01} = hv_{02}Both (1) & (2) 1 2 3 4 29 / 50 The wave number of a spectral line in the emission spectrum of Hydrogen will be equal to 8/9 times the Rydberg's constant if the electron jumps from n = 3 to n = 1 n = 10 to n = 1 n = 9 to n = 1 n = 2 to n = 1 30 / 50 In an atom, an e^{-} is moving with a speed of 600 ms^{-} with an accuracy of 0.005%. Certainly with which the position of e^{-} can be located is1.52 x 10^{-4} m5.10 x 10^{-3} m1.92 x 10^{-3} m3.84 x 10^{-3} m 1 2 3 4 31 / 50 If de-Broglie λ of a particle of mass m is 100 times Its velocity, then the value of λ in terms of mass (m and h is 1 2 3 4 32 / 50 Which of the following electronic configurations for _{26}Fe is violating Hund's rule? 1 2 3 4 33 / 50 When the light of frequency 2×10^{16} Hz is irradiated on a metal surface with the work function of 57.514x10^{-19}J, what will be its kinetic energy?10^{-16} J7.5×10^{-18} J8.5×10^{-18} J300×10^{-5} J 1 2 3 4 34 / 50 Which of the following equations is in accordance with de Broglie's hypothesis? 1 2 3 4 35 / 50 For which orbital it could not be the Radial distribution function? 1s 2p 3p 3d 36 / 50 Magnetic moment of Fe^{3+} is 3.872 BM 5.92 BM 4.899 BM 6.48 BM 37 / 50 The number of spectral lines obtained in the visible region when electrons de-excite from the 4th shell to the ground shell of hydrogen are: 2 3 4 5 38 / 50 Which of the following set of quantum numbers has maximum energy? n = 4, l = 1, m = 0, s = +1/2 n = 4, l = 0, m = 0, s = +1/2 n = 3, l = 2, m = 0, s = +1/2 n = 2, l = 1, m = 0, s = +1/2 39 / 50 If E_{1,} E_{2,} E_{3} and E_{4} are the energy of the first, second third and fourth orbit of the H-atom respectively, then. The correct order of energy difference isE_{3} - E_{2} > E_{4} - E_{3} > E_{2} - E_{1 }E_{2} - E_{1} > E_{3} - E_{2} > E_{4} - E_{3}E_{4} - E_{3} > E_{3} - E_{2} > E_{2} - E_{1}E_{4} - E_{3} > E_{2} - E_{1} > E_{3} - E_{2} 1 2 3 4 40 / 50 Electrons are emitted from a metal surface with zero velocity when it is exposed to radiation of wavelength 6000 Å. The threshold frequency of metal is5 x 10^{-19} s^{-1}5 x 10^{14} s^{-1}5 x 10^{15} s^{-1}5.84 x 10^{5} s^{-1} 1 2 3 4 41 / 50 The total number of exchanges possible in d-electrons of chromium (Atomic number = 24) is 5 10 6 9 42 / 50 If the wave number of the spectral line associated with a particular transition in the H-atom is X cm^{-1}, then what will be the wave number for the same transition in He^{+} and Li^{2+}? 2X, 3X X/2, X/3 4X, 9X X/4, 9/X 43 / 50 If the sample contains only 1H atom in the M shell on de-excitation to the ground state it can give maximum spectral lines 10 6 2 1 44 / 50 If r is the radius of first Bohr's orbit of He^{+}, the radius of n^{th} Bohr's orbit of He^{+} will be 1 2 3 4 45 / 50 Which of the statements about quantum numbers is wrong? If the value of l = 0, the electron distribution is spherical The shape of the orbital is given by subsidiary quantum number The Zeeman's effect is explained by magnetic quantum number The spin quantum number gives the orientation of electron cloud 46 / 50 Correct statement regarding uncertainty principle It rules out existence of trajectories of electron Its effect is significant for motion of microscopic objects Its effect is significant for motion of macroscopic objects Both (1) and (2) 47 / 50 Which of the following orbitals has two spherical nodes? 2s 4s 3d 6f 48 / 50 The maximum number of electrons, that can be present in a d-orbital is 2 10 8 6 49 / 50 The total number of orbitals in any shell is given bynn^{2}2n^{2}2l + 1 1 2 3 4 50 / 50 Which of the following quantities are quantized for an electron in an atom, according to Bohr's model Energy of a shell Angular momentum Velocity of electron in a particular shell All of these Your score is The average score is 8% 0% Restart quiz NEXT CHAPTER: Classification of Elements and Periodicity