Classification of Elements and Periodicity in Properties – 3

1) In the periodic table, elements have been arranged
a) In the order of increasing volume
b) In the order of increasing atomic number
c) In the order of increasing atomic weights
d) In the order of increasing density

2) Which is the electronic configuration of the most reactive non-metal?
a)
b)
c)
d)

3) The radius of isoelectronic species
a) Increases with an increase in the nuclear charge
b) Decreases with an increase in the nuclear charge
c) is the same for all
d) First increases and then decreases

4) Which of the following has the largest size?
a)
b)
c)
d)

5) Which of the following properties is explained in terms of lanthanide contraction?
a) The atomic number of the series
b) The number of extra-nuclear electrons
c) The density of the series
d) The ionic radius of the series

6) What are the conditions for the formation of an anion?
a) small size, low charge
b) small size, high charge
c) Large size, small charge
d) Large size, high charge

7) Given the data for the ionisation energies for atom X.

IE  k cals per mole
1st
258
2nd 555
3rd 1075
4th 1480
5th 9350

The most probable number of valency electrons for atom X is,
a) 5
b) 2
c) 3
d) 4

8) The correct order of increasing covalent radii is
a) Mg, Na, K Rb
b) Na, Mg,K, Rb
c) Na,Rb,K, Mg.
d) Na, K, Mg, Rb

9) What are the conditions for the formation of a cation?
a) Large size, large charge
b) Small size, low charge
c) Large size, low charge
d) Small size, high charge

10) In a group of the periodic table the ionisation potentials of elements decrease from the top to the bottom because of
a) The increase in densities
b) the decrease in chemical reactivities
c) the decrease in electronegativities
d) the increase in atomic sizes.

11) The atomic number of the element with the lowest electronegativity is:
a) 3
b) 9
c) 87
d) 105

12) On moving down a group of regular elements, both the atomic and ionic radii increase with increasing
a) Atomic number
b) Atomic weight
c) Atomic mass
d) None

13) On the Pauling scale, which of the following does not have electronegativity ?
a) Oxygen
b) Nitrogen
c) Chlorine
d) Bromine

14) The atomic size …. from left to right of the periodic table.
a) Increases
b) Decreases
c) No change
d) None of these

15) Write down the elements in the order of ascending electronegativities.
a) C,N, Si, P
b) N,Si, C, P
c) Si, P, C, N
d) P,Si,N,C

16) When we move from left to right of the second period, the atomic volume of the element
a) Increases
b) Decreases and then increases
c) Decreases
d) None of these

17) The second I.P of an element M is the energy required to.
a) Remove 2 moles of electrons from one mole of gaseous atoms.
b) Remove one mole of electrons from one mole of gaseous anions
c) Remove one mole of electrons from one mole of gaseous cations of the element.
d) Remove one mole of electrons from one mole of unipositive gaseous ions of the element.

18) Out of the I and II I.P of Na and Mg, which of the following is correct?
a) II I.P of Na = II I.P of Mg.
b) II I.P of Na < II I.P of Mg.
c) II I. P of Na > II I.P of Mg.
d) I I.P of Na > I I.P of Mg

19) Electron affinity is:
a) The energy needed to add an electron to a positively charged ionic species.
b) The energy needed to add an electron to a neutral gaseous atom.
c) Energy released on the addition of an electron to a neutral gaseous atom
d) Both (a) and (b).

20) Which of the following compounds are arranged according to the decreasing valency of chlorine?
a)
b)
c)
d)

21) The ions which are arranged in the correct order of increasing radii are
a) K+,Ca2+,S2-
b)
c)
d)

22) Which of the following does not have any unit?
a) Electronegativity
b) Electron affinity
c) Ionisation potential
d) Atomic radii

23) The effective nuclear charge depends upon:
a) The shielding constant
b) The atomic number
c) The charge on the nucleus
d) Both the nuclear charge and the shielding constant.

24) With reference to the ionisation potential, which of the following sets is correct?
a) Li>K>Cs
b) B>Li>K
c) Cs>Li>B
d) Cs<li<k< font=””>

25) Paulings electronegativity values for elements are useful in predicting the
a) Polarity of bonds in molecules
b) Position of elements in the electromotive series
c) Co-ordination number
d) Dipole moment of various molecules

26) Which of the following ion is not iso-electronic with ?
a)
b)
c)
d)

27) Which of the following compounds are analogous to the lanthanides ?
a) Actinides
b) Borides
c) Carbides
d) Hydrides

28) Which of the following is most electronegative ?
a) Lead
b) Silicon
c) Carbon
d) Tin

29) Which of the following is the correct order of ionisation energy ?
a) Be < B < C < N < O
b) B < Be < C < O < N
c) Be > B > C > N > O
d) B < Be < N < C < O

30) Which of the following is a non-metal?
a) Gallium
b) Indium
c) Boron
d) Aluminium

31) In the modern periodic table the place of the element with atomic number 31 is in the
a) s-block
b) p-block
c) d-block
d) f-block

32) In which of the following is the tendency towards the formation of coloured ions maximum ?
a) s-block elements
b) d-block elements
c) p-block elements
d) All of these

33) Which is correct about ionisation potential ?
a) It decreases with increase in atomic radii
b) Increases with increase in atomic radii
c) is independent of atomic radii
d) None

34) Which of the following is the correct order of ionic size?
a)
b)
c)
d) None

35) The first IP in eV of N and O is respectively
a) 14.6, 13.6
b) 13.6, 14.6
c) 13.6, 13.6
d) 14.6, 14.6

36) The element X [Is22s22p63s23p5] reacts with Y (atomic no. = 1) to form.
a)
b)
c)
d) None of the above

37) As we proceed from left to right in the periods,
a) Electronegativity decreases
b) the mMetallic character decreases
c) the electron affinity increases
d) Both (b) and (c)

38) On going from right to left in a period in the periodic table, the electronegativity of the elements.
a) Increases
b) Decreases
c) Remains unchanged
d) Decreases first and then increases

39) In the periodic table, the element with atomic number 16 will be placed in the group
a) Third
b) Fourth
c) Fifth
d) Sixth

40) Metals belonging to the same group in the periodic table are :
a) Mg and Na
b) Mg and Cu
c) Mg and Ba
d) Mg and K

41) The element with the highest electronegativity among the following is
a) C
b) Mg
c) O
d) S

42) The ionic radii of N3-, O2-, F and Na+ follows the order
a)
b)
c)
d)

43) Elements with the outer electronic configuration ns2np6 are
a) Alkaline earth metals
b) Transition elements
c) Chalcogens
d) Noble gases

44) In the following elements the most electropositive one is
a) Copper
b) Caesium
c) Barium
d) Chromium

45) The electronic configuration of a metal M isIs22s22p63s1. The formula of its oxide is.
a) MO
b)
c)
d)

46) Which of the following metals reacts with water at room temperature ?
a) Ni
b) Ag
c) Cu
d) Na

47) The last element of group IV is found to be
a) Strong metallic
b) Weak metallic
c) Strong non-metallic
d) Weak non-metallic

48) Which of the following is a metalloid ?
a) Pb
b) Zn
c) As
d) None

49) If the electronic configuration of M = 2,8,3 and that of A = 2, 8, 7 , the formula of their compound is
a)
b)
c)
d)

50) Which of the following has the smallest size ?
a)
b)
c)
d)

51) Which of the following is largest in size ?
a)
b)
c)
d)

52) Which of the following species has the lowest ionisation potential ?
a)
b) O
c)
d)

53) Which of the following is the most dense ?
a) Fe
b) Cu
c) B
d) Pb

54) The atomic number of N is 7. The atomic number of the III member of the nitrogen family is
a) 23
b) 15
c) 33
d) 43

55) the number of unpaired electrons in an inert gas is
a) 0
b) 8
c) 4
d) 18

56) Elements in which 4f-orbitals are progressively filled are called
a) Transition elements
b) Lanthanides
c) Actinides
d) Inert gases

57) All the elements in a group in the periodic table have the same
a) Atomic weight
b) Atomic number
c) Mass number
d) Number of electrons for bonding

58) The outermost electronic configuration of the most electronegative element is
a)
b)
c)
d)

59) The valence of A is 3 and B is 2, then the compound is
a)
b)
c)
d)

60) Which is isoelectronic with the hydride ion?
a) He
b)
c)
d)

61) Arrange the elements Na, Rb, K, Mg in the order of atomic radius.
a) Na, K, Mg, Rb
b) K, Na, Mg, Rb
c) Mg, Na, K, Rb
d) Rb, K, Mg, Na

62) The incorrect statement among the following is.
a) The first IP of Al is less than the first IP of Mg
b) The second IP of Mg is greater than the second IP of Na
c) The first IP of Na is greater than the first IP of Mg
d) The third IP of Mg is greater than the third IP of Al

63) Which of the following elements has the highest first ionisation potential ?
a) Boron
b) Carbon
c) Nitrogen
d) Oxygen

64) Of the following, the one with the largest size is
a)
b) Ar
c)
d)

65) All elements in the 3rd period have
a) An atomic number of 3
b) 3 complete subshells
c) 2 complete sub shells
d) 3 electrons less than the octet

66) The second ionisation potential of an element M is the energy required to RRR
a) Remove one mole of electrons from one mole of gaseous anion
b) Remove one mole of electrons from one mole of gaseous cation of element
c) Remove one mole of electrons from one mole of monovalent gaseous cation of the element
d) Remove 2 moles of electrons from one mole of gaseous atom

67) Which of the following has the maximum ionisation potential ?
a) Mg
b) Si
c) Al
d) P

68) The first IP of Mg is …than that of Al.
a) Less
b) More
c) Equal
d) None of these

69) Which of the following properties remains unchanged on descending a group in the periodic table ?
a) Atomic size
b) Density
c) Valence electrons
d) Metallic character

70) Which of the following properties increases on going down from F to I in group VII A of the periodic table ?
a) Electronegativity
b) Volatile nature
c) Ionic radius
d) Oxidising power

71) Which of the following is the correct order of gradually decreasing basic nature of oxides?
a)
b)
c)
d)

72) The correct sequence of elements in decreasing order of first ionisation energy is
a) Na > Mg > Al
b) Mg > Na > Al
c) Al > Mg > Na
d) Mg > Al > Na

73) The atomic radius of elements of which of the following series would be nearly the same?
a) Na, K, Rb, Cs
b) Li, Be, B, C
c) Fe, Co, Ni, Cu
d) F, Cl, Br, I

74) Which show variable valency ?
a) d-block elements
b) Radioactive elements
c) s-block elements
d) p-block elements

75) Which elements of the following atomic numbers are placed in the s-block elements ?
a) 7, 12
b) 6, 12
c) 3, 12
d) 9, 17

76) Elements with the following atomic numbers belong to the same group.
a) 11, 37
b) 19, 15
c) 39, 88
d) None of these

77) Which is smallest in size ?
a)
b)
c)
d)

78) Arrange the elements S, Se and As in order of decreasing metallic character,
a) As > Se > S
b) S > Se > As
c) Se > AS > S
d) None

79) Arrange O-Cl, O-O and O-Na in order of increasing polarity.
a) O-O < O-Cl < O-Na
b) O-Na < O-Cl < O-O
c) O-O < O-Na < O-Cl
d) None

80) On the Pauling scale some elements have the same electronegativities. Which of the following is not correct ?
a) Cs = Fr = 0.7.
b) N = Cl = 3.0.
c) H = P = 2.1.
d) All are correct.

81) Arrange Mg, Al, P, S and Ar in the order of increasing second ionisation potential.
a) Mg < Al < P < S < Ar
b) Ar < Al < P < S < Mg
c) Mg < P < Al < S < Ar
d) None

82) In the periodic table the element with atomic number 30 is expected to be present in
a) IB
b) IA
c) IIA
d) IIB

83) The elements of group I B and II B are
a) Normal elements
b) Transition elements
c) Alkaline earth metals
d) Alkali metals

84) The elements of group IV A are
a) Strongly electropositive
b) Strongly electronegative
c) Weakly electronegative
d) Neither strongly electropositive nor strongly electronegative

85) In the long form of the periodic table all the nonmetals are placed under the
a) s-block
b) p-block
c) f-block
d) d-block

86) Element A of group VA combines with element B of group VIA. The resulting compound may have the formula
a) A2B5
b)
c)
d)

87) The elements present in IA group form a family because
a) They exhibit similar chemical properties
b) They possess a common pattern of electronic configuration
c) They come immediately after noble gases
d) All are correct

88) In a period in the periodic table, as the atomic number increases
a) The electronegative nature goes on increasing
b) The electropositive nature goes on increasing
c) The chemical reactivity goes on increasing
d) The chemical reactivity goes on decreasing

89) Zero group was introduced by
a) Lothar Meyer
b) Mendeleev
c) Ramsay
d) Lockyer

90) Decimal atomic masses are due to the mixture of
a) Isomers
b) Impurities
c) Allotropes
d) Isotopes

91) The highest ionisation potential in a period is shown by
a) Alkali metals
b) Transition elements
c) Halogens
d) Alkaline earth metals

92) Halogens have been placed in the VII group of the periodic table because
a) They are non-metals
b) They are very reactive
c) They are electronegative
d) They have seven electrons in the outermost orbit

93) On descending a group, the electropositive character of the elements
a) Increases
b) Decreases
c) Remains the same
d) None

94) Which of the following pairs belongs to the same group ?
a) Elements with atomic numbers 17 and 38
b) Elements with atomic numbers 20 and 40
c) Elements with atomic numbers 17 and 53
d) Elements with atomic numbers 11 and 33

95) The atomic radii of fluorine and neon in units are respectively given by
a) 0.72, 1.60
b) 1.60, 1.60
c) 0.72, 0.72
d) 1.60,0.72

96) Each period in the periodic table starts with a subshell of the new shell and ends with
a) a small subshell
b) a different subshell of the same shell
c) The next higher shell
d) the p-subshell of the same shell

97) With the increase in atomic number in a period
a) The number of oxidation states that an element shows in its compounds increases
b) the electropositive character increases
c) the electropositive character decreases
d) the metallic character increases

98) Which is the most non-metallic of the following ?
a) Be
b) B
c) Mg
d) Al

99) Which pair of elements is chemically most similar ?
a) Na, Al
b) Cu, S
c) Ti, Zr
d) Zr, Hf

100) In the series C, N, O and F, the electronegativity
a) Decreases from C to F
b) Increases from C to F
c) Remains constant
d) Decreases from C to O and then increases


Answer

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