Periodic Classification of Elements and Periodicity MCQs
MCQ's with answers from chapter 1 chemistry book 12 Periodic Classification of Elements and Periodicity for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.
51. Excluding hydrogen and helium, the smallest elements in the periodic table is
a) Lithium b) Fluorine
c) Cesium d) Iodine
52. Which halogen has the smallest electron affinity?
a) F b) Cl
c) Br d) I
53. The element with atomic number 7 is likely to have same properties to the element whose atomic number is
a) 11 b) 2
c) 15 d) F
54. Which of the following will have largest size?
a) Br b) I -1
c) I d) F
55. In its chemical properties, calcium is most similar to
a) Cs b) Cu
c) Sc d) Sr
56. Which two of the following are iso electronic with one another?
a) Na+ and O b) Na+ and K+
c) Na+ and Ne d) Ne and O
57. Which of the following is a transuranic element?
a) Americium b) Plutonium
c) Neptunium d) All of these
58. The hydrogen, which is present in the atmosphere of sun and stars in a large amount, is
a) H2 b) H
c) H+ d) H-
59. Cesium and Francium are liquids above
a) 10oC b) 15oC
c) 20oC d) 30oC
60. In an aqueous solution the hydrides of alkali metals are
a) Stable b) Unstable
c) No change d) None of these
61. As the atomic number of the halogen increases, the halogens
a) Lose their outermost electrons less easily
b) Become less dense
c) Becomes lighter in color
d) Gain electrons less easily
62. The electron affinity of fluorine is
a) – 348.8 kj/mol b) – 337 kj/mol
c) 337 kj/mol d) 348.8 kj/mol
63. Which ionic halides have high m.p and b.p?
a) Fluoride b) Chloride
c) Bromide d) Iodide
64. Which gas is used in the making of tungsten bulb filaments?
a) H2 b) N2
c) O2 d) CO2
65. The ionic halides in order of decreasing m.p and b.p can be arranges as
a) Iodide>bromide>chloride> fluoride
b) Bromide>chloride>fluoride>iodide
c) Chloride>bromide>iodide>fluoride
d) Fluoride>chloride>bromide>iodide
66. A hydride ion and helium atom has same number of
a) Protons b) Neutrons
c) Electrons d) All of these
67. Ionic hydrides are also called
a) Saline hydrides b) Salt like hydrides
c) Both a & b d) None of these
68. The hydrides are acts as powerful reducing agents are
a) Ionic b) Covalent
c) Interstitial d) Complex
69. The hydrides which are non stoichiometric in nature are
a) Ionic b) Covalent
c) Interstitial d) Complex
70. Which one is the example of complex hydride?
a) PH3 b) NaH
c) LaH3 d) NaBH4
71. The adsorption of hydrogen by platinum is known as
a) Hydrogenation b) Dehydrogenation
c) Occlusion d) Substitution
72. From left to right in a periodic table charge to mass ratio increases therefore the hydration energy
a) Decreases b) Increases
c) Remains constant d) None of these
73. ______ elements have been discovered so
far.
a) 100 b) 110
c) 120 d) 150
74. _______ classified the then known elements
into metals, non metals and their derivatives.
a) Dobreiner b) Al – Razi
c) Newlands d) Mendeleeve
75. Dobreiner’s work led to the law of triads which states that ______
a) Atomic weight of any one element was
found to be approximately the mean of the
other two elements of triad.
b) Atomic weight of the middle element was
found to be approximately the mean of the
other two elements of a triad.
c) Atomic number of any one element was
found to be approximately the mean of the
other two elements of a triad.
d) Atomic number of the middle element was
found t be approximately the mean of the
other two elements of a triad.
76. The law of octaves was given by _______
a) Dobreiner b) Al – Razi
c) Newlands d) None of these
77. Law of octave states that ______
a) The properties of every 6th element from the
given one were similar to the first.
b) The properties of every 9th element from the
given one were similar to the first.
c) The properties of every 8th element from the
given one were similar to the first.
d) The properties of every 7th element from the
given one were similar to the second.
78. Mendeleev’s Periodic Table was based on _______
a) Atomic number b) Atomic mass
c) Atomic volume d) Electronic configuration
79. Moseley’s work led to the periodic law, which
states that _______
a) The number of the electrons in the 1st
energy level increases as the atomic
number increases.
b) The properties of the elements are a
periodic function of their atomic mass.
c) The x – rays spectra of the elements are
more complex than the optical spectra.
d) The properties of elements are the periodic
function of their atomic number.
80. A pair of elements in the same family in the
periodic table classification is ________
a) Chlorine and carbon
b) Calcium and aluminum
c) Nitrogen and neon
d) Sodium and potassium
81. In the period, the elements are arranged in
strict sequence in order of _______
a) Increasing charges in the nucleus.
b) Increasing atomic weights.
c) Increasing number of electrons in valence
shell.
d) Increasing valency.
82. Uranium is a member of
a) s – block b) p – block
c) d – block d) f – block
83. How many ionization energies can carbon
have?
a) 1 b) 2
c) 4 d) 6
84. Which ion has the maximum polarization
power?
a) L+ b) Mg 2+
c) Al 3+ d) O 2-
85. Which of the following halides is not oxidized
by MnO2?
a) F b) Cl-
c) Br d) I
86. The process requiring absorption of energy is
a) F → F b) Cl → Cl
c) O → O2 d) H → H
87. Most of the known elements are metals of
______ of periodic table.
a) D – block b) P – block
c) III – group d) Zero block
88. The volume in cubic centimeters occupied by
one gram atom of the element is called
______
a) Atomic volume b) Atomic weight
c) Mass number d) None
89. The lowest ionization energies are found in the
_______
a) Inert gases b) Alkali metals
c) Transition elements d) Halogens
90. The unit of ionization energy is _______
a) Joule b) Calorie
c) Electron volt d) None
91. The electropositive elements form _____
a) Acidic oxides b) Basic oxides
c) Neutral oxides d) Amphoteric oxide
92. The electronegative elements form _____
a) Acidic oxides b) Basic oxides
c) Neutral oxides d) Amphoteric oxide
93. The ionization energy of nitrogen is more than
oxygen because of _______
a) More attraction of electrons by the nucleus
b) More penetration effect
c) The extra stability of half filled p – orbital
d) The size of nitrogen atom is smaller.
94. _______ ion has the largest radius.
a) Al+3 b) Cl-1
c) F-1 d) O-2
95. Ionic hydrides are usually _______
a) Liquids at room temperature
b) Good reducing agents
c) Good electrical conductors in solid state
d) Easily reduced.
96. The hydronium ion is a/an _______
a) Ion with formula H2O+
b) Ion with the formula H3O+
c) Free radical rather than an ion
d) Ion formed by removal of H- form a water
molecule.
97. When steam is passed over red hot coke at
1000oC, a mixture of carbon monoxide and
hydrogen gas is produced. It is known as
______
a) Heavy water b) Water gas
c) Phosgen gas d) None
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