Chemistry For Class IX (New Book ) - Chapter No. 3 - Periodic Table And Periodicity Of Properties - Multiple Choice Questions And Fill In The Blanks

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Chapter No.3 - Periodic Table And Periodicity Of Properties
MCQs And Fill In The Blanks
Text Book Exercise

SECTION- A: MULTIPLE CHOICE QUESTIONS
Tick Mark (✓) the correct answer

1. In 1869 Mendeleev put forward his periodic law about:
(a) Atomic Number
(b) Chemical properties
(c) Physical properties
(d) Atomic Mass  ✓

2. The periodic table divided into S, P, d, and f block based on.
(a) Atomic Radius
(b). Electronic Configuration ✓
(c) Ionization Energy
(d). Electron Affinity

3. 4^th and 5^th period in periodic table are known as:
(a) Short period
(b) Long period ✓
(c) Normal period
(d) Very long period

4. Which one of the following decreases along the period?
(a) Ionization Energy
(b) Atomic Radius ✓
(c) Electronegativity
(d) Electron Affinity

5. The elements of VIIA group are known as:
(a) Lanthanides
(b) Actinides
(c) Halogens ✓
(d) Noble Gases

6. According to Moseley the chemical properties of elements are the periodic function of their:
(a) Atomic Size
(b) Atomic Mass
(c) Atomic Radius
(d) Atomic Number ✓

7. The shielding effect across the period:
(a) Increases
(b) Decrease
(c) Moderate
(d) Same ✓

8. The ability to attract shared pair of electron is called:
(a) Electron Affinity
(b) Electronegativity ✓
(c) Ionization Energy
(d) Shielding Effect

9. In group electron affinity values decreases from top to bottom because:
(a) Atomic size normal
(b) Atomic size increases ✓
(c) Atomic size decreases
(d) Atomic size same

10. All Transition Elements are:
(a) Gases
(b) Metals ✓
(c) Nonmetals
(d) Metalloids

11. He proposed the classification of Triads in which several groups of three elements classified based on atomic masses.
(a) Dobereiner ✓
(b) Newland
(c) Mendeleev
(d) Moseley

12. In the classification of Triads central element had an atomic mass average of the other:
(a) five elements
(b) four elements
(c) three elements
(d) two elements ✓

13. In 1864 British chemist Newland put forward the:
(a) classification of Triads
(b) Law of Octaves ✓
(c) 8 columns and rows arrangement
(d) 9 columns and groups arrangement

14. It is order of increasing atomic masses.
(a) classification of Triads
(b) Law of Octaves ✓
(c) 8 columns and rows arrangement
(d) 9 columns and groups arrangement

15. According to him the eighth element has similar properties as the first element in a group of eight elements.
(a) Dobereiner
(b) Moseley
(c) Newland ✓
(d) Mendeleev

16. In 1869, he published eight vertical columns (groups) and horizontal rows (periods) on the basis of physical and chemical properties of elements.
(a) Dobereiner
(b) Newland
(c) Mendeleev ✓
(d) Moseley

17. In 1869, this German scientist published a periodic table in which 56 elements were arranged in 9 vertical columns or groups based on atomic masses.
(a) Lother Meyer ✓
(b) Mendeleev
(c) Newland
(d) Moseley

18. His periodic table was the first attempt to arrange the elements.
(a) Dobereiner
(b) Moseley
(c) Newland
(d) Mendeleev ✓

19. Based on periodic Law a periodic table developed in which vertical columns are called:
(a) periods
(b) groups ✓
(c) triads
(d) classes

20. In periodic table, horizontal lines are called:
(a) periods ✓
(b) groups
(c) triads
(d) classes

21. In 1869, he proposed a periodic law based on physical and chemical properties empirically.
(a) Dobereiner
(b) Newland
(c) Mendeleev ✓
(d) Moseley

22. Mendeleev's Periodic law states that "The properties of the elements are a periodic function of their:
(a) atomic number
(b) atomic radius
(c) atomic charge
(d) atomic weight ✓

23. It is a fundamental property because it increases regularly from element to element and is fixed for every element.
(a) atomic number ✓
(b) atomic radius
(c) atomic charge
(d) atomic weight

24. In the periodic table, the atomic number increases from:
(a) right to left
(b) left to right ✓
(c) top to bottom
(d) bottom to top

25. In 1913, he discovered that Atomic number is the basic property of an atom.
(a) Dobereiner
(b) Moseley ✓
(c) Newland
(d) Mendeleev

26. He proposed a modern periodic law.
(a) Dobereiner
(b) Newland
(c) Mendeleev
(d) Moseley ✓

27. The long form of periodic table composed with:
(a) 9 rows & 8 columns
(b) 8 rows & 9 columns
(c) 7 rows and 8 columns ✓
(d) 8 rows and 7 columns

28. There are seven horizontal lines in periodic table known as:
(a) periods ✓
(b) groups
(c) triads
(d) classes

29. The first period is the shortest period which contains only:
(a) one elements
(b) two elements ✓
(c) three elements
(d) four elements

30. The second and the third periods contain:
(a) 2 elements
(b) 8 elements ✓
(c) 14 elements
(d) 32 elements

31. These periods contain 18 elements.
(a) The 6^th & 7^th
(b) The 5^th & 6^th
(c) The 4^th and 5^th ✓
(d) The 2^nd & 3^rd

32. The 6th period contains:
(a) 2 elements
(b) 8 elements
(c) 14 elements
(d) 32 elements ✓

33. The 14 elements in the bottom of the 6th period are named as:
(a) Lanthanides ✓
(b) Actinides
(c) Alkali metals
(d) Transition elements

34. It is the longest period of the periodic table.
(a) 4^th
(b) 5^th
(c) 6^th ✓
(d) 7^th

35. This period is consider as an incomplete.
(a) 4^th
(b) 5^th
(c) 6^th
(d) 7^th ✓

36. The 7^th period contains a group of 14 elements known as:
(a) Lanthanides
(b) Actinides ✓
(c) Alkali metals
(d) Transition elements

37. All the periods except the first period start with a / an:
(a) alkali metal ✓
(b) transition element
(c) noble gas
(d) Actinide

38. All the periods except the first-period end at a / an:
(a) alkali metal
(b) transition element
(c) noble gas ✓
(d) Actinide

39. There are eight vertical columns in periodic table known as:
(a) periods
(b) groups ✓
(c) triads
(d) classes

40. In periodic table, the sub groups are divided on the basis of their:
(a) atomic masses
(b) atomic numbers
(c) similar properties ✓
(d) None of these

41. The elements of subgroup B are called:
(a) Lanthanides
(b) Actinides
(c) Alkali metals
(d) Transition elements ✓

42. The group number indicates total number of electrons in:
(a) an atom of the element
(b) valence shell of the element ✓
(c) a nucleus of the element
(d) the first shell of the element

43. The elements of group I A are called:
(a) alkali metals ✓
(b) alkaline earth metals
(c) noble gases
(d) transition elements

44. Their valence shell contains one electron.
(a) Group I A ✓
(b) Group II A
(c) Group III A
(d) Group IV A

45. The elements of group II A are called:
(a) alkali metals
(b) alkaline earth metals ✓
(c) noble gases
(d) transition elements

46. Their valence shell contains two electrons.
(a) Group IA
(b) Group II A ✓
(c) Group III A
(d) Group IV A

47. This is also called the carbon family.
(a) Group I A
(b) Group II A
(c) Group III A
(d) Group IV A ✓

48. In their valence shell, the oxygen family has:
(a) 6 electrons ✓
(b) 5 electrons
(c) 4 electrons
(d) 3 electrons

49. All of the elements of this group exist in allotropic forms.
(a) IVA
(b) VA
(c) VIA ✓
(d) VII A

50. The group or inert or noble gases are:
(a) VIII B
(b) VIII A ✓
(c) VII A
(d) VII B

51. These are the groups of transition metals.
(a) IB to VIII B ✓
(b) IA to VIII A
(c) III B to VII B
(d) III A to VII A

52. The periodic table has been divided into:
(a) six blocks
(b) five blocks
(c) four blocks ✓
(d) three blocks

53. They are colorless, unreactive and diamagnetic gases.
(a) Transition elements
(b) Noble gases ✓
(c) Lanthanides
(d) Actinides

54. They are placed in zero group.
(a) alkali metals
(b) alkaline earth metals
(c) transition elements
(d) noble gases ✓

55. The elements of group IA and IIA are:
(a) s block elements ✓
(b) p block elements
(c) d block elements
(d) f block elements

56. Elements of this group / these groups are p block elements.
(a) IIIA to VII
(b) zero group
(c) Both 'a' & 'b' ✓
(d) None of these

57. d-block elements are also called:
(a) transition elements
(b) outer transition elements ✓
(c) inner transition elements
(d) noble gases

58. d-block elements consist of:
(a) six series
(b) five series
(c) four series
(d) three series ✓

59. f-block elements are also called:
(a) transition elements
(b) outer transition elements
(c) inner transition elements ✓
(d) noble gases

60. They exhibit electronic configuration ns² (n²)d1¹, (n-¹)f^1-14.
(a) f-block elements ✓
(b) d-block elements
(c) p-block elements
(d) s-block elements

61. f-block elements consist of:
(a) five series
(b) four series
(c) three series
(d) two series ✓

62. Half of this distance is considered to be the radius of the atom. It is measured in:
(a) centimeters (cm)
(b) Angstrom unit (A) ✓
(c) decimeters (dcm)
(d) None of these

63. 1A =:
(a) 10^-3 cm
(b) 10^-2 cm
(c) 10^-8 cm ✓
(d) 10^-11 cm

64. In the periodic table, that atomic radius increases from:
(a) left to right
(b) right to left
(c) top to bottom ✓
(d) bottom to top

65. As the atomic number increases from left to right, the atomic radius:
(a) decreases ✓
(b) increases
(c) remains the same
(d) does not follow any rule

66. The ionization energy is the amount of energy required to:
(a) add an electron in the outermost shell of a gaseous atom
(b) remove an electron from a gaseous state ✓
(c) to reduce the shielding effect
(d) All of these

67. The ionization energy is measured in:
(a) joule/kg
(b) joule/gram
(c) mole/kg
(d) joule/mole ✓

68. The ionization energy depends upon:
(a) atomic size
(b) nuclear charge
(c) Both 'a' & 'b' ✓
(d) None of these

69. The higher ionization energy means:
(a) removal of an electron is more difficult ✓
(b) removal of an electron is easier
(c) adding of an electron is more difficult
(d) adding of an electron is easier

70. If we move from left to right in periods the value of ionization energy:
(a) decreases
(b) increases ✓
(c) remains the same
(d) does not follow any rule

71. As we move down the group ionization energy decreases from:
(a) left to right
(b) right to left
(c) top to bottom ✓
(d) bottom to top

72. The electron affinity is the amount of energy released when:
(a) an electron is removed from the outermost shell of a gaseous atom
(b) an electron is added to the outermost shell of a gaseous atom ✓
(c) shielding effect is reduced
(d) shielding effect is increased

73. Electron affinity means tendency to accept electron to form:
(a) molecule
(b) radical
(c) cation
(d) anion ✓

74. In a period electron affinity increases from:
(a) left to right ✓
(b) right to left
(c) top to bottom
(d) bottom to top

75. In a group electron affinity values decrease from:
(a) left to right
(b) right to left
(c) top to bottom ✓
(d) bottom to top

76. As the size of iodine is bigger than bromine its electron affinity is:
(a) more than bromine
(b) less than bromine ✓
(c) equal to bromine
(d) zero

77. The ability of an atom to attract the shared pair of electrons towards itself in a molecule is called:
(a) ionization potential
(b) electron affinity
(c) shielding effect
(d) electronegativity ✓

78. In period, electronegativity increases from:
(a) left to right ✓
(b) right to left
(c) top to bottom
(d) bottom to top

79. Lanthanides and Actinides are the elements of block:
(a) s
(b) p
(c) d
(d) f ✓

80. The repetition of properties after regular intervals is called:
(a) grouping
(b) perioding
(c) periodicity ✓
(d) None of them

81. The elements of sub group A are called:
(a) transition elements
(b) representative elements ✓
(c) lanthanides
(d) actinides

82. In periodic table, the shielding effect increases:
(a) down the group ✓
(b) down the period
(c) left to the group
(d) down to the group