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MCQ on Periodic Classification of Elements Pdf Class 10
MCQ on Periodic
Classification of Elements Pdf Class 10 has been prepared according to a new
pattern of 10 Board Examinations and completely based on the NCERT Science book of
class 10.
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Chapter 5- Periodic Classification of Elements
Choose the correct answer:
1.An alkaline
metal is
(a) Ca
(b)K
(c) CI
(d)Ar
Correct answer-(b)
2.An
alkaline-earth metal is
(a) Ca
(b)K
(c) CI
(d)Ar
Correct answer-(a)
3.An
halogen-element is
(a) Ca
(b)K
(c) CI
(d)Ar
Correct answer-(c)
Explanation – Elements of group 17
in Modern Periodic table are called halogens.
4. Today the
number of elements known, is
(a)101
(b)63
(c)104
(d)114
Correct answer-(d)
5. \“Law of
Octaves” was proposed by
(a) Newlands
(b)Doberiener
(c) Mendeleev
(d)Lother-Mayer
Correct answer-(a)
6. The number
of elements classified by Mendeleev was
(a) 53
(b)63
(c) 73
(d)93
Correct answer-(b)
7. The main
drawback of Mendeleev’s periodic table was
(a) Uncertainty in the position of isotopes
(b)Some elements with greater atomic mass were placed before
element with lesser atomic mass
(c) Unnecessary emphasis
on valency
(d)All the above
Correct answer-(d)
8. Mendeleev
classified the elements on the basis of
(a)Metals and non-metals
(b)Atomic number
(c)Atomic mass
(d)Physical state
Correct answer-(c)
9. An
inert-gas is
(a) Ca
(b)K
(c) CI
(d)Ar
Correct answer-(d)
Explanation – Gases present in the
group 18 in the modern Periodic table are called inert gases because they do not
react with other elements.
10. The father
of periodic law was
(a) Newlands
(b)Doberiener
(c) Mendeleev
(d)Lother-Mayer
Correct answer-(c)
11. Elements
were classified in the form of triads, by
(a) Newlands
(b)Doberiener
(c) Mendeleev
(d)Lother-Mayer
Correct answer-(b)
12. Mendeleev
left one gap under B and AI, for an element, which was discovered later on,
this element was -
(a) Na
(b)Ca
(c)Ga
(d)Ba
Correct answer-(c)
13. On the
basis of similarities in properties, Mendeleev corrected the atomic masses of
some elements. Some of these are -
(a)Silver and Gold
(b)Gold and Platinum
(c)Platinum and
Germanium
(d)Germanium and Scandium
Correct answer-(b)
14. Modern
Periodic-table is based on the
(a) Metallic Character
(b)Atomic Mass
(c) Atomic Number
(d)Melting points of elements
Correct answer-(c)
15. Which is
not an element of 1st group?
(a) Na
(b)K
(c) Cs
(d)Ca
Correct answer-(d)
16. Which is
not an alkaline earth metal?
(a) Mg
(b)Cs
(c) Ca
(d)Ba
Correct answer-(b)
17. Which is not a halogen?
(a) Kr
(b)Br
(c) CI
(d)I
Correct answer-(a)
18. Which is
not an inert gas?
(a) He
(b)Ce
(c) Xe
(d)Ne
Correct answer-(b)
19. Which
statement is correct about Modern Periodic Table?
(a) Number of protons
determines the atomic number of the elements.
(b)It is based on the electronic configuration of elements.
(c) Elements present in one group have the same number of
electrons in the outermost shell.
(d)All the above
Correct answer-(d)
20. Atomic
number of elements was discovered by
(a) Newlands
(b)Bohr
(c) Moseley
(d)All the above
Correct answer-(c)
21. Mendeleev
was a citizen of
(a) Russia
(b)India
(c) German
(d)U.S.A.
Correct answer-(a)
22. Moseley was
a scientist of
(a) Russia
(b)India
(c) Britain
(d)U.S.A.
Correct answer-(c)
23. Which has
the largest atomic size in the following I group elements, Na, Li, K, Cs?
(a)Na
(b)Li
(c) K
(d)Cs
Correct answer-(d)
24. Which element
of 17th group has largest atomic size?
(a) F
(b)Br
(c)I
(d)At
Correct answer-(d)
25. In the
following elements of II period, which has the smallest atomic size – Li, C, F
and Ne.
(a) Li
(b)C
(c) F
(d)Ne
Correct answer-(c)
26. Which is
the largest atom?
(a)Mg
(b)Na
(c) S
(d)CI
Correct answer-(b)
27. Which is
the smallest atom?
(a) Mg
(b)Na
(c) S
(d)CI
Correct answer-(d)
28. The
elements of 1st group form with oxygen.
(a) acidic oxides
(b)amphoteric oxides
(c) basic oxides
(d)acidic and basic oxides both
Correct answer-(c)
29. An element
has electronic configuration 2, 8, 8, 1. Which statement is not correct about
the element?
(a) Its valency is one positive
(b)Its valency is one negative
(c) It is present is IA group
(d)It is present in IV-period
Correct answer-(b)
30. When Sr, Mg
and Ca are placed in decreasing order of their atomic sizes, the order is
(a) Sr, Mg, Ca
(b)Ca, Sr, Mg
(c) Mg, Ca, Sr
(d)Sr, Ca, Mg
Correct answer-(d)
31. When Li, Na, K are placed in the decreasing order of their ionisation energy, the order is
(a) Li, Na, K
(b)K, Na, Li
(c) Li, K, Na
(d)Na, Li, K
Correct answer-(a)
32. Modern
periodic table has periods
(a) 5
(b)6
(c) 7
(d)8
Correct answer-(c)
33. Al atomic
number 13 has been placed in group
(a) 13th
(b)3rd
(c)2nd
(d)None of above
Correct answer-(a)
34. An element
is placed in third period and 14th group of the periodic table, its
atomic number is
(a) 34
(b)14
(c) 43
(d)22
Correct answer-(b)
35. Atomic size of elements present in the same period, .................. with increasing atomic number
(a) increases
(b)decreases
(c) remains same
(d)No definite trend
Correct answer-(b)
36. Atomic size
of elements present in one group, .............. with increasing atomic number
(a) increases
(b)decreases
(c) remains same
(d)No definite trend
Correct answer-(a)
37. Atomic
number of one element is 18, and electronic configuration is 2,8,8. Which
statement is correct about the element?
(a) It is an element of 18 group
(b)It is highly reactive
(c) It is metallic in nature
(d)It is present in the II period
Correct answer-(a)
38. One element
M is present in the 13th group, the formula of its chloride is
(a) MCI2
(b)M2CI3
(c)M3CL
(d)MCI3
Correct answer-(d)
39. Which is a
metalloid
(a) Bi
(b)Ba
(c)Be
(d)Br
Correct answer-(a)
40. The nature
of SiO2 is
(a) Acidic
(b)Basic
(c) Neutral
(d)Amphoteric
Correct answer-(d)
41. Which of the following elements will form an acidic oxide
(a) An element with atomic number 3
(b) An element with atomic number 7
(c) An element with atomic number 19
(d) An element with atomic number 12
Correct answer-(b)
42. Which one the following does not increase while moving down the group of the periodic table
(a) Metallic character
(b) Valency
(c) Atomic radius
(d) Number of shells
Correct answer-(b)
Explanation – Valency of an element
remains constant on moving downwards in a particular group.
43. Law of Octaves
was applicable upto
(a) K
(b)Mg
(c) Ca
(d)CO
Correct answer-(c)
44. Electronic
configuration of an element is 2, 8, it is present in
(a)group 2
(b)group 18
(c) group 8
(d)group 10
Correct answer-(b)
45. The
metalloid is
(a) B
(b)Bi
(c) Be
(d)all the above
Correct answer-(d)
46. Which of
the following change while moving down
the group in the periodic table
(a) atomic size
(b)metallic character
(c) number of shells
(d) all above
Correct answer-(d)
47. Which of the given elements A,B, C,D, and E with atomic number 2,3,7,10 and 30 respectively belongs to the same period
(a) A,B,C
(b)B,C,D
(c) A,D,E
(d)B,D,E
Correct answer –(b)
48. Where would you locate the elements with electronic configuration 2,8 in the modern periodic table
(a) Group 8
(b) Group 2
(c) Group 18
(d) Group 10
Correct answer –(c)
49. Which of the following is the outermost shell for elements of period 2
(a) K shell
(b) L shell
(c)M shell
(d) N shell
Correct answer –(b)
50. Which one of the following elements shows maximum number of valence electrons
(a) Na
(b) Si
(c) Al
(d) P
Correct answer- (d)
51. Which of the following elements would lose an electron easily
(a) Mg
(b) K
(c) Na
(d) Ca
Correct answer- (b)
52. An element which is essential constituents of all organic comp[ounds belongs to
(a) Group 1
(b) Group 16
(c) Group 15
(d) Group 14
Correct answer-(d)
53. Which of the following gives the correct increasing order of the atomic radii of O, F and N
(a) O,F,N
(b) O,N,F
(c) N,F,O
(d) F,O,N
Correct answer-(d)
54. Which of the following are the characteristics of isotopes of an elements
(i) Isotopes of an element have same atomic masses
(ii) Isotopes of an element have same atomic number
(iii) Isotopes of and element show same physical properties
(iv)Isotopes of elements show same chemical properties
(a) (i),(iii),(iv)
(b) (ii),(iii),(iv)
(c)(ii),(iii)
(d) (ii) (iv)
Correct answer- (d)
55. What type of oxide would Eka – aluminium form
(a) EO3
(b) E2O3
(c) E3O2
(d)EO
Correct answer –(b)
56. Three elements B, Si, and Ge are
(a) Non-metals
(b) Metals
(c) Metalloids
(d)Metals, non-metals and metalloids
Correct answer-(c)
57. Which of
the following elements does not loss an electron easily
(a) F
(b) Na
(c) Mg
(d) Al
Correct answer- (a)
CBSE class10 Periodic Classification fill in the blanks
Here you are provided with Important Class
10 Science Chapter 5 fill in
the blanks which are also very useful in the context of new pattern of CBSE
Class Board Exams 2021-22. You can prepare Multiple Choice Questions using
following fill in the blanks yourself.
Periodic Classification of Elements Fill in the blanks
1.Mendeleev’s basis for the Periodic table
is .............................
2. Fluorine, Chlorine, Bromine, and Iodine
are called .............................
3. Oxygen and .............................
are present in the 16th group.
4. The basis for Modern Periodic table is .............................
5. The horizontal rows in periodic table
are called .............................
6. The .............................
columns of periodic table are called groups.
7.There are .............................
elements in the first period of Periodic table.
8. According to Newlands’ classification, the properties of Beryllium
are similar to Magnesium, because
Magnesium is .............................
element starting from Beryllium.
9.Mendeleev classified
............................. elements known at that time.
10............................. and
............................. periods contain 8 elements each.
11. The elements of 1st group are called
.............................
12.The elements of 2nd group are called
.............................
13.The elements of
............................. group are called as halogens.
14.In a period, atomic size
............................. moving from left to right.
15. Na and CI are present in the same
period, if Na is present in 1st group and CI in 17th group Atomic-size of
............................. is greater than atomic-size of
.......................
16. C belongs to
............................. group of periodic table.
17.On going down in a group in the
periodic table, the metallic character of elements
.............................
18. Electron affinity
............................. on moving down in group of the periodic table.
19. Atomic-number of an element is the
number of ............................. or .............................
20. Elements present in zero group of
periodic table have ............................. electrons in the outermost
shell of their atoms.
21.An element is present in III period and
3rd group, total number of electrons in its atom
is.............................
22. The elements of zero group are
............................. gases.
23. If an element is present in the 3rd
group of the periodic table, there will be ............................. electrons
in the outermost shell of its own.
24. Metallic character
............................. moving left to right in the periodic table.
25. Metallic character
............................. moving down the group.
26.In group, atomic size
............................. on moving down in the group.
27.The number of electrons present in the
outermost shell is same in the elements present in .............................
group.
28. In the second period, on moving left to
right, the number of electrons in outermost shell of elements increases from
............................. to .............................
29. According to Mendeleev’s periodic law,
the properties of elements are periodic function of their
.............................
30. According to Modern Periodic law, “The
properties of elements are periodic-function of their
.............................
31. An element M is present in the second
group of periodic table, the formula of its oxide is
.............................
32.An element A is present in the third
group of the periodic table, the formula of its chloride is
.............................
33.Valency of inert gases is
.............................
34.............................. is bigger
in size in Na and Li.
35. CI is ............................. in
size in CI and Br.
36. Atomic number of inert gas present in the third period is .............................
37. Alkali-metal present in the fourth
period is .............................
38.............................., calcium
and barium are alkaline-earth metals.
40. Boron and .............................
are metalloids.
41. Inert gas .............................
has only two electrons in its outermost shell.
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