11th class (FSc) chemistry Unit 5 MCQs
51. Splitting of spectral lines when atoms are subjected to stronge electric field is called:
a. Photoelectric effect
b. Zeeman effect
c. Compton effect
d. Stark Effect
52. In the ground state of an atom, the electron is present:
a. Nearest to the nucleus
b. In the nucleus
c. Farthest from nucleus
d. In the second shell
53. Quantum number values for 2p orbitals are:
a. n = 1 ,𝓁 = 0
b. n = 2 ,𝓁 = 1
c. n = 2 ,𝓁 = 0
d. n = 1 ,𝓁 = 2
54. Orbitals having same energy are called:
a. Degenerate orbitals
b. Hybrid orbitals
c. D-orbitals
d. Valence orbitals
55. When 6d orbitals os complete, the entering electron will go to:
a. 7p
b. 7f
c. 7d
d. 7s
56. The elements for which the value of ionization energy is low, can:
a. Loss electrons less readily
b. Gain electrons readily
c. Lose electrons readily.
d. Gains electron with difficulty
57. The nature of cathode rays in discharge tube:
a. Is independent of the nature pf the gas in discharge tube
b. Depends on the nature of gas taken in the discharge tube
c. Depends upon the nature of anode in the discharge tube
d. Depends upon the nature of cathode in discharge tube
58. The relative energy of 4s,4p and 3d orbitals are in the order:
a. 4r<4s<3d
b. 3d<:4p<4s
c. 4p<3d<4s
d. 4s<3d<4p
59. With increase is the value of principle quantum number n the shape of the s-orbitals remains the same although their sizes.
a. Remain the same
b. Decrease
c. May or may not remian the same
d. Increase
60. Correct order of energy in the given subshells is:
a. 5s>3d>4s>3p
b. 5s>3d>3p>4s
c. 3p>3d>4s>5s
d. 3p>3d>5s>4s
61. Number of electrons in the outermost shell of chloride ion (Cl) is:
a. 1
b. 17
c. 8
d. 3
62. According to the number of protons, neutrons and electrons given in the table, which one of the following options is correct.
a. As-1Ga,Ca-2
b. As-3Ga-3,Ca-2
c. As-1Ga-2,Ca+2
d. As3Ga-3,Ca
63. If the e/m value of electrons is 1.7588 x 1011 coulombs kg-1 then what would be the mass of electron in grams ) charge on electron is 1.6022x 10 coulombs)?
a. 9.1095 x 10-28g
b. 9.1095 x 10-31g
c. 0.919095 x10mg
d. 9.1095 x 1031g
64. Which one of the following pairs has the same electronic configuration as possessed by Neon(Ne-10)
a. K+,Cl–
b. Na+,Cl–
c. Na+,f0
d. Na+,Mg2+
65. There are four orbits s,p,d and f which order is correct with respect tothe increasing energy of the orbitals?
a. 4p<4s<4f<4d
b. 4s<4p<4d<4f
c. 4f<4s<4d<4p
d. null
66. Number of the neutrons in 66/30 Zn will be:
a. 38
b. 30
c. 36
d. 35
67. The maximum number of electrons in electronic configuration can be calculated by using formula.
a. 2n2
b. 2l+1
c. 2n+1
d. 2n+2
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