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Class 11 Chemistry
Classification Of Elements And Periodicity In Properties Chapter 3
Quiz 1
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Lothar Meyer arranged the elements in order of increasing:
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Atomic weight
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Density
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Atomic volume
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Atomic radii
Law of Octaves was proposed by:
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JW Dobereiner
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D.I Mendeleev
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John Alexander Newlands
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Lothar Meyer
Law of Triads is applicable to which set of elements?
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Sodium, Potassium, Rubidium
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Fluorine, Iodine, Bromine
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Chlorine, Bromine, Iodine
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Lithium, Beryllium, Boron
In Mendeleev's periodic table, the groups were divided into how many subgroups?
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4
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1
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2
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3
Modern periodic table is divided into:
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18 periods and 7 groups
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8 periods and 18 groups
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18 periods and 8 groups
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7 periods and 18 groups
Moseley performed experiments and studied the frequencies of which radiations emitted from the elements?
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Gamma rays
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X-rays
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UV rays
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Infra red rays
Among the following statements the one that is not true about Mendeleev's Periodic Table is:
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Elements of group 7 and 8 were arranged on the basis of equivalent weights
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Some elements in the same group differ in their properties
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Elements were arranged on the basis of atomic weights
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The position of hydrogen was not justified
Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass?
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Newlands
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Lothar Meyer
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Moseley
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Meyer
Johann Dobereiner classified elements in group of three elements called as
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Trinity
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Trials
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Triads
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Diads
In the modern periodic table, which period contains 32 elements?
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Sixth
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First
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Seventh
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Second
Horizontal rows in the periodic table are called:
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Cell
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Table
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Groups
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Periods
The second and third period of the modern periodic table contains how many elements?
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8
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32
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18
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2
Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:
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Third element
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Fourth element
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Second element
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First element
According to Dobereiner's law of triads the number of elements present in each group is:
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2
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4
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5
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3
Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties?
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Only physical properties
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Only chemical properties
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In both physical and chemical properties
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thermodynamic properties
Eka silicon predicted by Mendeleev is which element:
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Germanium
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Aluminium
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Gallium
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Sodium
Eka aluminium predicted by Mendeleev is which element?
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Germanium
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Magnesium
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Gallium
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Sodium
The basis of long form of periodic table is:
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Mass number
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Atomic weight
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Atomic number
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Ionic radius
Mendeleev predicted the existence of which element/elements in the periodic table?
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Gallium
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Sodium and germanium
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Gallium and germanium
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Germanium and Gold
At present how many elements are known?
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110
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114
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63
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105
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