Periodic Classification of Elements
MCQ Questions Science
1.) Dobereiners triads were written in the order of increasing …………………..
a) Atomic number
b) Atomic mass
c) Neutron number
d) Proton number
ANS-Atomic mass
2.) Mass of sodium element.
a) 21.88
b) 22.99
c) 22
d) 17
ANS-22.99
3.) Which scientist explain ‘law of octaves’.
a) Dobereiners
b) Einstein
c) Newlands
d) Gigerl
ANS-Newlands
4.) Symbol of thorium element.
a) Th
b) Ti
c) Tl
d) Te
ANS-Th
5.) ………….. is the eighth element after lithium.
a) Boron
b) Helium
c) Carbon
d) Sodium
ANS-Sodium
6.) Newland octaves law applicable only upto……………
a) Sodium
b) Calcium
c) Magnesium
d) Carbon
ANS-Calcium
7.) Mendeleevs periodic table contains vertical columns called……………….
a) Group
b) Periods
c) Rows
d) Lines
ANS-Group
8.) Mendeleevs periodic table contains ……………………….called groups.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-vertical columns
9.) Mendeleeves horizontal rows called ‘…………………..’
a.) Group
b.) Periods
c.) Rows
d.) Lines
ANS-Periods
10.) Mendeleeves ………………….called ‘ Periods ‘.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-horizontal rows
11.) Atomic mass of cobalt.
a) 55
b) 56
c) 58.9
d) 57.9
ANS-58.9
12.) It is not noble gas………….
a) Helium
b) Neon
c) Argon
d) Boron
ANS-Boron
13.) ………………. Is the noble gas.
a) H
b) He
c) C
d) N
ANS-He
14.) Limitation of mendeleeves..
a) No fixed position of H
b) No fixed position of He
c) No fixed position of Be
d) No fixed position of C
ANS-No fixed position of H
15.) Isotopes means…………..
a) Similar physical property ,different atomic masses
b) Similar chemical property ,different atomic masses
c) Similar physical property ,different atomic Number
d) Similar chemical property ,different atomic Number.
ANS-Similar chemical property ,different atomic masses
16.) Similar chemical property but different atomic masses known as………….
a) Proton
b) Isomer
c) Isotope
d) Isotonic
ANS-Isotope
17.) Isotopes of elemental positions also one of the major limitations of ………………….. periodic table
a) Newland
b) Mendeleeves
c) Dobierner
ANS- Mendeleeves
18.) Formula of Manganese……..
a) Mg
b) Mn
c) Ma
d) Ms
ANS-Mg
19.) Formula of potassium.
a) P
b) K
c) Po
d) O
ANS-K
20.) ………. Horizontal rows present in modern periodic table/
a) 5
b) 8
c) 9
d) 7
ANS-7
21.) …………………………….. present in modern periodic table.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-horizontal rows
22.) ………. Vertical columns known as groups.
a) 8
b) 7
c) 18
d) 19
ANS- 18
23.) ………………………. known as groups.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-vertical columns
24.) Halogens present in group……….
a) 15
b) 16
c) 17
d) 18
ANS-17
25.) F, Cl present in group…………
a) 15
b) 16
c) 17
d) 18
ANS-17
26.) Number of shells increases as we go……………….
a) Down the diagonally
b) Down the group
c) Down the periods
d) Down the newlands periodic table.
ANS-Down the group
27.) Atomic No. ………………… by one unit on moving from left to right in periods.
a) Decreases
b) Increases
c) Same
d) None of the above
ANS-Increases
28.) Ar belongs to the………… period of modern periodic table.
a) 3rd
b) 4th
c) 5th
d) 6th
ANS-3rd
29.) Electrons of atoms are filled in…………………….. shells.
a) K, L, P
b) I, M, P
c) L, K, M
d) K, L, M
ANS-K, L, M
30.) Electron capacity of K shell
a) 4
b) 5
c) 6
d) 2
ANS-2
31.) Electrons can accommodated in a shell depends on formula…..
a) 2n
b) 2na
c) 2ne–
d) 2n2
ANS- 2n2
32.) Electron shells depends on 2n2 where ‘n’ is………….
a) Number of electron
b) Number of given shell from nucleus
c) Proton number
d) Neutron number
ANS-Number of given shell from nucleus
33.) Electron capacity of L shell
a) 4
b) 5
c) 6
d) 8
ANS-8
34.) Atomic radius means…
a) Distance between nucleus to outermost shell.
b) Distance of nucleus
c) Diameter of atom
d) Distance between two electron.
ANS-Distance between nucleus to outermost shell.
35.) Atomic radius of hydrogen …
a) 32 pm
b) 37 pm
c) 30 pm
d) 31 pm
ANS-37 pm
36.) 1 picometre means……….
a) 10 m
b) 10-5 m
c) 10-12 m
d) 10-15 m
ANS-10-12 m
37.) Atomic radius ……….. in moving from left to right along a period.
a) Decreases
b) Increases
c) Same
d) None of the above
ANS-Decreases
38.) Atomic radius decreases due to……………..
a) Proton number
b) Neutron number
c) Nuclear charge which pulled the electron
d) Nuclear charge which pulled the proton
ANS-Nuclear charge which pulled the electron
39.) Element which represents in periodic table known as………
a) Halogen
b) Gases
c) Noble gases
d) Metalloid
ANS-Metalloid
40.) Elements which behaves as metal as well nonmetals called.
a) Halogen
b) Gases
c) Noble gases
d) Metalloid
ANS- Metalloid
41.) Metallic character ………………. Across the period and …………………down the group
a) Increases, increase
b) Decreases, increases
c) Decreases, decreases
d) Increases, Decreases
ANS-Decreases, increases
42.) …………….. are electronegatives.
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Hydrogen
ANS-Nonmetals
43.) ………………………..are electropositive in nature.
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Hydrogen
ANS-Metals
44.) Silicon is ……………………
a) Halogen
b) Gases
c) Noble gases
d) Metalloid
ANS- Metalloid
45.) Calcium is a…………………..
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Hydrogen
ANS-Metals
46.) Oxides of metals is ……………. In nature.
a) Acidic
b) Basic
c) Amphoteric
d) Salty
ANS-Basic
47.) Oxides of non-metals is ……………. In nature.
a) Acidic
b) Basic
c) Amphoteric
d) Salty
ANS-Acidic
48.) Atomic number of berellium.
a) 5
b) 4
c) 7
d) 8
ANS-4
49.) Atomic mass of hydrogen.
a) 1
b) 2
c) 3
d) 0
ANS-1
50.) Krypton is…………..
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Noble gas
ANS-Noble gas
a) Atomic number
b) Atomic mass
c) Neutron number
d) Proton number
ANS-Atomic mass
2.) Mass of sodium element.
a) 21.88
b) 22.99
c) 22
d) 17
ANS-22.99
3.) Which scientist explain ‘law of octaves’.
a) Dobereiners
b) Einstein
c) Newlands
d) Gigerl
ANS-Newlands
4.) Symbol of thorium element.
a) Th
b) Ti
c) Tl
d) Te
ANS-Th
5.) ………….. is the eighth element after lithium.
a) Boron
b) Helium
c) Carbon
d) Sodium
ANS-Sodium
6.) Newland octaves law applicable only upto……………
a) Sodium
b) Calcium
c) Magnesium
d) Carbon
ANS-Calcium
7.) Mendeleevs periodic table contains vertical columns called……………….
a) Group
b) Periods
c) Rows
d) Lines
ANS-Group
8.) Mendeleevs periodic table contains ……………………….called groups.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-vertical columns
9.) Mendeleeves horizontal rows called ‘…………………..’
a.) Group
b.) Periods
c.) Rows
d.) Lines
ANS-Periods
10.) Mendeleeves ………………….called ‘ Periods ‘.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-horizontal rows
11.) Atomic mass of cobalt.
a) 55
b) 56
c) 58.9
d) 57.9
ANS-58.9
12.) It is not noble gas………….
a) Helium
b) Neon
c) Argon
d) Boron
ANS-Boron
13.) ………………. Is the noble gas.
a) H
b) He
c) C
d) N
ANS-He
14.) Limitation of mendeleeves..
a) No fixed position of H
b) No fixed position of He
c) No fixed position of Be
d) No fixed position of C
ANS-No fixed position of H
15.) Isotopes means…………..
a) Similar physical property ,different atomic masses
b) Similar chemical property ,different atomic masses
c) Similar physical property ,different atomic Number
d) Similar chemical property ,different atomic Number.
ANS-Similar chemical property ,different atomic masses
16.) Similar chemical property but different atomic masses known as………….
a) Proton
b) Isomer
c) Isotope
d) Isotonic
ANS-Isotope
17.) Isotopes of elemental positions also one of the major limitations of ………………….. periodic table
a) Newland
b) Mendeleeves
c) Dobierner
ANS- Mendeleeves
18.) Formula of Manganese……..
a) Mg
b) Mn
c) Ma
d) Ms
ANS-Mg
19.) Formula of potassium.
a) P
b) K
c) Po
d) O
ANS-K
20.) ………. Horizontal rows present in modern periodic table/
a) 5
b) 8
c) 9
d) 7
ANS-7
21.) …………………………….. present in modern periodic table.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-horizontal rows
22.) ………. Vertical columns known as groups.
a) 8
b) 7
c) 18
d) 19
ANS- 18
23.) ………………………. known as groups.
a) vertical columns
b) horizontal rows
c) vertical lines
d) horizontal lines
ANS-vertical columns
24.) Halogens present in group……….
a) 15
b) 16
c) 17
d) 18
ANS-17
25.) F, Cl present in group…………
a) 15
b) 16
c) 17
d) 18
ANS-17
26.) Number of shells increases as we go……………….
a) Down the diagonally
b) Down the group
c) Down the periods
d) Down the newlands periodic table.
ANS-Down the group
27.) Atomic No. ………………… by one unit on moving from left to right in periods.
a) Decreases
b) Increases
c) Same
d) None of the above
ANS-Increases
28.) Ar belongs to the………… period of modern periodic table.
a) 3rd
b) 4th
c) 5th
d) 6th
ANS-3rd
29.) Electrons of atoms are filled in…………………….. shells.
a) K, L, P
b) I, M, P
c) L, K, M
d) K, L, M
ANS-K, L, M
30.) Electron capacity of K shell
a) 4
b) 5
c) 6
d) 2
ANS-2
31.) Electrons can accommodated in a shell depends on formula…..
a) 2n
b) 2na
c) 2ne–
d) 2n2
ANS- 2n2
32.) Electron shells depends on 2n2 where ‘n’ is………….
a) Number of electron
b) Number of given shell from nucleus
c) Proton number
d) Neutron number
ANS-Number of given shell from nucleus
33.) Electron capacity of L shell
a) 4
b) 5
c) 6
d) 8
ANS-8
34.) Atomic radius means…
a) Distance between nucleus to outermost shell.
b) Distance of nucleus
c) Diameter of atom
d) Distance between two electron.
ANS-Distance between nucleus to outermost shell.
35.) Atomic radius of hydrogen …
a) 32 pm
b) 37 pm
c) 30 pm
d) 31 pm
ANS-37 pm
36.) 1 picometre means……….
a) 10 m
b) 10-5 m
c) 10-12 m
d) 10-15 m
ANS-10-12 m
37.) Atomic radius ……….. in moving from left to right along a period.
a) Decreases
b) Increases
c) Same
d) None of the above
ANS-Decreases
38.) Atomic radius decreases due to……………..
a) Proton number
b) Neutron number
c) Nuclear charge which pulled the electron
d) Nuclear charge which pulled the proton
ANS-Nuclear charge which pulled the electron
39.) Element which represents in periodic table known as………
a) Halogen
b) Gases
c) Noble gases
d) Metalloid
ANS-Metalloid
40.) Elements which behaves as metal as well nonmetals called.
a) Halogen
b) Gases
c) Noble gases
d) Metalloid
ANS- Metalloid
41.) Metallic character ………………. Across the period and …………………down the group
a) Increases, increase
b) Decreases, increases
c) Decreases, decreases
d) Increases, Decreases
ANS-Decreases, increases
42.) …………….. are electronegatives.
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Hydrogen
ANS-Nonmetals
43.) ………………………..are electropositive in nature.
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Hydrogen
ANS-Metals
44.) Silicon is ……………………
a) Halogen
b) Gases
c) Noble gases
d) Metalloid
ANS- Metalloid
45.) Calcium is a…………………..
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Hydrogen
ANS-Metals
46.) Oxides of metals is ……………. In nature.
a) Acidic
b) Basic
c) Amphoteric
d) Salty
ANS-Basic
47.) Oxides of non-metals is ……………. In nature.
a) Acidic
b) Basic
c) Amphoteric
d) Salty
ANS-Acidic
48.) Atomic number of berellium.
a) 5
b) 4
c) 7
d) 8
ANS-4
49.) Atomic mass of hydrogen.
a) 1
b) 2
c) 3
d) 0
ANS-1
50.) Krypton is…………..
a) Metals
b) Nonmetals
c) Alkali earth metals
d) Noble gas
ANS-Noble gas
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