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1 1 t year n0te chemitry new CHAPTER 5 ATOMIC STRUCTURE MCQ Q.1 Splitting of pectral line when atom are ubjected to trong electric field i called (a) Zeeman effect (b) Stark effect (c) Photoelectric effect (d) Compton effect Q.2 The velocity of photon i (a) independent of it wavelength (b) depend on it wavelength (c) equal to quare of it amplitude (d) depend on it ource Q.3 The nature of poitive ray depend on (a) the nature of electrode (b) the nature of dicharge tube (c) the nature of reidual ga (d) all of the above Q.4 The wave number of the light emitted by a certain ource i 2 x 106 m. The wavelength of thi light i (a) 500 nm (b) 500 m (c) 200 nm (d) 5 x 10 1 m Q.5 Rutherford model of atom failed becaue (a) the atom did not have a nucleu and electron (b) it did not account for the attraction between proton and neutron (c) it did account for the tability of the atom (d) there i actually no pace between the nucleu and the electron Q.6 Bohr model of atom i contradicted by (a) Planck quantum theory (b) Pauli excluion principle (c) Heienberg uncertainty principle 1
2 1 t year n0te chemitry new (d) All of the above Q.7 Quantum number value for 2p orbital are (a) n = 2, l = 1 (b) n = 1, l = 2 (c) n = 1, l = 0 (d) n = 2, l = 0 Q.8 In the ground tate of an atom, the electron i preent (a) in the nucleu (b) in the econd hell (c) nearet to the nucleu (d) farthet from the nucleu Q.9 When the 6d orbital i complete the entering electron goe into (a) 7f (b) 7 (c) 7p (d) 7d Q.10 Orbital having ame energy are called (a) hybrid orbital (b) valence orbital (c) degenerate orbital (d) d orbital Q.11 The e/m value for the poitive ray i maximum for (a) hydrogen (b) helium (c) nitrogen (d) oxygen Q.12 Neutron wa dicovered by Chadwick in (a) 1935 (b) 1930 (c) 1932 (d) 1934 Q.13 The velocity of photon i (a) equal to quare of it amplitude (b) independent of it wavelength (c) Equal to it wave number (d) equal to the velocity of light Q.14 Quantum number value for 3p orbital are (a) n = 0, l = 3 (b) n = 3, l = 1 (c) n = 2, l = 1 (d) n = 1, l = 3 Q.15 The radiu of firt orbit of hydrogen atom (a) Ao (b) Ao (c) Ao (d) Ao Q.16 All atom are principally compoed of few fundamental particle which are in number (a) 2 (b) 3 2
3 1 t year n0te chemitry new (c) 4 (d) 5 Q.17 Which cientit gave the name of electron to the cathode ray (a) Planck (b) Eintein (c) Stoney (d) Bohr Q.18 The diviibility of atom wa howed by (a) Stoney (b) J.J. Thomon (c) Millikan (d) Rutherford Q.19 The nature of cathode ray remain the ame irrepective of the material ued for (a) ga (b) cathode (c) gla (d) electrode Q.20 Ma of electron i (a) 9.1 x kg (b) x gm (c) 8.1 x g (d) 9.1 x mg Q.21 The charge on an electron i (a) x c (b) x c (c) x c (d) x c Q.22 The charge on the proton i (a) x c (b) zero (c) x 1019 c (d) x c Q.23 The charge on the neutron i (a) x c (b) zero (c) x c (d) x c Q.24 The calculated e/m value of electron i (a) x 1019 c kg 1 (b) x c kg 1 (c) x c kg 1 (d) x 109 c kg Q.25 The ma of proton i (a) 9.11 x kg (b) x kg (c) 1.60 x kg (d) x kg Q.26 The ma of neutron i (a) x kg (b) x kg (c) 9.11 x kg (d) 1.60 x kg Q.27 The charge on electron wa determined by 3
4 1 t year n0te chemitry new (a) J.J. Thomon (b) Millikan (c) Rutherford (d) Bohr Q.28 Alpha particle are identical to (a) hydrogen atom (b) helium atom (c) helium nuclei (d) fat moving electron Q.29 Bombardment of Beryllium with alpha particle generate (a) proton (b) neutron (c) electron (d) poitron Q.30 The colour of the glow produced in the dicharge tube depend upon (a) ga (b) electrode (c) compoition of ga (d) preure Q.31 When the preure of the ga in dicharge tube i reduced, which of the following become more prominent (a) ga glow (b) ga ionize (c) a dicharge take place (d) ga conduct electricity Q.32 Goldtein dicovered that beide the cathode ray, another type of ray are produced in the dicharge tube which are called (a) alpha ray (b) beta ray (c) poitive ray (d) gamma ray Q.33 The e/m value for the poitive ray in the dicharge tube depend upon (a) nature of electrode ue (b) nature of ga ued (c) compoition of the ga (d) preure Q.34 The ditance between the two adjacent cret or trough i called (a) wave number (b) frequency (c) wavelength (d) amplitude Q.35 The value of Planck contant h i (a) x cal (b) x J ec (c) x kj (d) x k cal 4
5 1 t year n0te chemitry new Q.36 In the Bohr model of atom the electron in an energy level emit or aborb energy only when it (a) remain in the ame energy level (b) die out (c) change it energy level (d) jump away Q.37 The energy aociated with an electron reolving in firt orbit i (a) x k J/mol (b) k J/mol (c) k J/mol (d) k J/mol Q.38 The region of pectrum are (a) three (b) even (c) eight (d) five Q.39 The diperion of the component of white light when it i paed through prim i called (a) rainbow (b) light pattern (c) refraction (d) pectrum Q.40 Which of the following colour ha the hortet wavelength in the viible pectrum of light (a) red (b) blue (c) violet (d) green Q.41 Which of the following colour ha the longet wavelength in the viible pectrum of light (a) red (b) blue (c) violet (d) green Q.42 A pectrum containing wavelength of all wavelength i called (a) continuou (b) dicontinuou (c) line (d) atomic Q.43 A pectrum howing only certain colour of light i called (a) continuou (b) line (c) dicontinuou (d) band Q.44 The wavelength range of viible pectrum i 5
6 1 t year n0te chemitry new (a) nm (b) nm (c) nm (d) nm Q.45 The pectral line of Lyman erie (uv region) are produced when electron jump from higher orbit to (a) 1t orbit (b) 2nd orbit (c) 3rd orbit (d) 4th orbit Q.46 The pectral line of Balmer erie (viible region) are produced when electron jump from higher orbit to (a) 1t orbit (b) 2nd orbit (c) 3rd orbit (d) 4th orbit Q.47 The pectral line of Pachen erie (viible region) are produced when electron jump from higher orbit to (a) 1t orbit (b) 2nd orbit (c) 3rd orbit (d) 4th orbit Q.48 The pectral line of Bracket erie (viible region) are produced when electron jump from higher orbit to (a) 1t orbit (b) 2nd orbit (c) 3rd orbit (d) 4th orbit Q.49 A dual character of matter particle in motion wa potulated by (a) De Broglie (b) Planck (c) Eintein (d) Schrodinger Q.50 If an electron i moving with a velocity of x 106 m/ then it wavelength will be (a) 0.33 x 106 nm (b) 0.33 x 10 2 nm (c) 0.33 nm (d) 0.22 nm Q.51 If a tone of 1gm i many with a velocity of 10m/ then it wavelength will be (a) 6.65 x m (b) 6.65 x m (c) 6.65 x m (d) 6.65 x m Q.52 The pace around the nucleu where the probability of finding the electron i maximum i called (a) an orbital (b) an orbit (c) energy level (d) a hell 6
7 1 t year n0te chemitry new Q.53 Which orbital ha dumb bell hape (a) orbital (b) p orbital (c) d orbital (d) f orbital Q.54 Which of the following quantum number decribe energy of an electron in an atom (a) principal quantum (b) azimuthal quantum (c) magnetic quantum (d) pin quantum Q.55 Which of the following quantum number decribe hape of an electron in an atom (a) principal quantum (b) azimuthal quantum (c) magnetic quantum (d) pin quantum Q.56 The degenerate orbital in p ubhell i (a) 2 (b) 3 (c) 5 (d) 7 Q.57 When 4p orbital i complete the entering electron goe into (a) 4d (b) 4f (c) 5 (d) 5p Q.58 x + l value for 3d will be (a) 3 (b) 4 (c) 5 (d) 6 Q.59 Maximum number of electron in 3f orbital i (a) 2 (b) zero (c) 6 (d) 14 Q.60 Maximum number of electron in M hell i (a) 2 (b) 8 (c) 18 (d) 32 Q.61 An orbital can have maximum electron (a) 2 (b) 8 (c) 18 (d) 6 Q.62 n + l value for 4f will (a) 2 (b) 5 (c) 7 (d) 9 7
8 1 t year n0te chemitry new Q.63 When a pectrum of light i formed by the radiation given off by a ubtance it i called (a) line pectrum (b) continuou pectrum (c) emiion pectrum (d) aborption pectrum Q.64 Neutron wa dicovered by (a) Chadwick (b) Bohr (c) J.J. Thomon (d) Eintein Q.65 Cathode ray can drive a mall paddle wheel which how that they (a) are poitively charged (b) poe momentum (c) do not poe momentum (d) none of thee Q.66 Slow neutron are generally more effective than fatne for the purpoe of (a) effuion (b) fiion (c) penetration (d) aborption Q.67 The wavelength aociated with the moving tone (a) can be meaured by many method (b) cannot be meaured by any method (c) can be meaure by ome method (d) none of thee Q.68 Radiu of orbit of an electron and velocity of electron are (a) directly proportional to each other (b) inverely proportional to each other (c) independent to each other (d) none of thee Q.69 The value of magnetic quantum number give u information about the number of orbital in a (a) mall hell (b) orbit (c) ubhell (d) none of thee Q.70 Which of the following term are ued for the number of poitive charge on the nucleu of an atom 8
9 1 t year n0te chemitry new (a) atomic number (b) atomic ma (c) nuclear charge (d) atomic charge Q.71 The uncertainty principle wa tated by (a) de Broglie (b) Heinenberg (c) Eintein (d) Schrodinger Q.72 When a preure in a dicharge tube i reduced, which of the following phenomenon become very prominent (a) ga conduct electricity (b) a dicharge take place (c) ga ionize (d) ga glow Q.73 Atom bomb i baed on the principle of (a) nuclear fuion (b) nuclear fiion (c) fuion and fiion both (d) radioactivity Q.74 A pinning electron create (a) magnetic field (b) electric field (c) quantum field (d) none of thee Q.75 The volume of pace in which there i 95% chance of finding an electron i (a) orbit (b) atomic orbital (c) degenerate orbital (d) quantized orbital Q.76 Planck equation i (a) E = mc2 (b) E = hv (c) E = hv2 (d) E = mc Q.77 In an atom, the electron (a) are tationary in variou energy level (b) are ditributed in three dimenional charge cloud around the nucleu (c) embedded in pace around the nucleu (d) revolve around the nucleu at random Q.78 The ma number of an element i equal to 9
10 1 t year n0te chemitry new (a) number of electron in an atom (b) number of proton and neutron in the nucleu (c) number of proton in the nucleu (d) number of neutron in the nucleu Q.79 The energy of bounded electron in H atom i (a) poitive (b) negative (c) zero (d) none of thee Q.80 Quantum number which ha ymbol n i called (a) principal quantum (b) Azimuthal quantum (c) Spin quantum (d) Magnetic quantum ANSWERS Quetion Anwer b a c a c Quetion Anwer c a c c c Quetion Anwer a c d b c Quetion Anwer b c b d a Quetion Anwer c a b b b Quetion Anwer a b c b c Quetion Anwer c c b c b 10
11 1 t year n0te chemitry new Quetion Anwer c b c d c Quetion Anwer a a b a a Quetion Anwer b c d a c Quetion Anwer a a b a b Quetion Anwer b c c b c Quetion Anwer a c c a b Quetion Anwer b b b c a Quetion Anwer b b b a b Quetion Anwer b b b b a 11
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