MCQs of Chapter # 04 [Periodicity of elements] Class IX

 

Chemistry IX

MCQs [Chapter# 04]

i.                    He classified the elements into metals, nonmetals and derivatives:

a.      Al Razi

b.      Al Beruni

c.       Ibn e Hayyan

d.      Ibn e Sina

 

ii.                 Law of triad is applied on only:

a.       2 elements

b.     3 elements

c.       4 elements

d.      5 elements

 

iii.               According to Newland’s law, the chemical properties of elements are same:

a.      1st and 8^th

b.      2^nd and 7^th

c.       3^rd and 6^th

d.      4^th and 5^th

 

iv.                Mendeleev’s periodic table is based on:

a.       Atomic number

b.      Atomic volume

c.      Atomic mass

d.      All of the above

 

v.                  Mendeleev’s table has:

a.       6 periods

b.      8 periods

c.       10 periods

d.     12 periods

 

vi.                Modern periodic table has:

a.       6 periods

b.     7 periods

c.       8 periods

d.      9 periods

 

vii.             Mendeleev’s table has:

a.       6 groups

b.      7 groups

c.      8 groups

d.      9 groups

 

viii.           Modern periodic table has:

a.       6 groups

b.      7 groups

c.      8 groups

d.      9 groups

 

ix.                Which is/are the disadvantage of Mendeleev’s periodic table?

a.       He did not left spaces for isotopes

b.      Dissimilar atoms were placed in similar group

c.       He failed to give the idea of atomic structure

d.     All of the above

 

x.                  It is called alkaline earth metals:

a.       Group IA

b.     Group IIA

c.       Group IIIA

d.      Group IVA

 

xi.                The highly reactive metals are:

a.      Group IA

b.      Group IIA

c.       Group IIIA

d.      Group IVA

 

xii.             The electropositive metals are:

a.      Group IA

b.      Group IIA

c.       Group IIIA

d.      Group IVA

 

xiii.           Valence shell has 3 electrons:

a.       Group IA

b.      Group IIA

c.       Group IIIA

d.      Group IVA

 

xiv.            Nitrogen family is:

a.       Group IA

b.      Group IIIA

c.      Group VA

d.      Group VIIA

 

xv.              The elements of this group required electrons to fulfil its valence shell:

a.       Group VA

b.     Group VIA

c.       Group VIIA

d.      Group VIIIA

xvi.            Zero group is:

a.       Group VA

b.      Group VIA

c.       Group VIIA

d.     Group VIIIA

 

xvii.         Which of the following is/are characteristics of Transition elements?

a.       They show variable valence

b.      They form color compounds

c.       They have magnetic and catalytic properties

d.     All of the above

 

xviii.       The shortest period is:

a.      1^st period

b.      2^nd period

c.       3^rd period

d.      4^th period

 

xix.            The incomplete period is:

a.       4^th period

b.      5^th period

c.       6^th period

d.     7^th period

 

xx.              Metals form:

a.       Acidic oxides

b.     Basic oxides

c.       Neutral oxides

d.      All of the above

 

xxi.            1A⁰ =

a.       10^-8 m

b.      10^-10 m

c.       10^-12 m

d.      10^-14 m

 

xxii.         Electron affinity:

a.       Increases down the group

b.     Decreases down the group

c.       Sometime increases and sometime decreases

d.      No change

 

xxiii.       Atomic radii:

a.      Increases along the period

b.      Decreases along the period

c.       Sometime increases and sometime decreases

d.      No change

 

xxiv.        Lanthanide series include elements having atomic number from:

a.      58 to 71

b.      60 to 73

c.       62 to 75

d.      90 to 103