NEET Chemistry - New - Classification of Elements and Periodicity in Properties

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Question - 1

The correct order of atomic radii in group 13 elements is :

  • A B < Al < In < Ga < Tl
  • B B < Al < Ga < In < Tl
  • C B < Ga < Al < Tl < In
  • D B < Ga < Al < In < Tl

Question - 2

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?

  • A Halogen family, [Rn] 5f14 6d10 7s2 7p5
  • B Carbon family, [Rn] 5f14 6d10 7s2 7p2
  • C Oxygen family, [Rn] 5f14 6d10 7s2 7p4
  • D Nitrogen family, [Rn] 5f14 6d10 7s27p6

Question - 3

The species Ar, K+ and Ca2+ contain the same number of electrons. In which order do their radii increase?

  • A Ca2+ < K+ < Ar
  • B K+ < Ar < Ca2+
  • C Ar < K+ < Ca2+
  • D Ca2+ < Ar < K+

Question - 4

In which of the following orders the ionic radii is correctly represented?

  • A H- > H+ > H
  • B Na+ > F- > O2-
  • C F- > O2- > Na+
  • D None of these

Question - 5

Identify the wrong statement in the following :

  • A Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius.
  • B Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius.
  • C Atomic radius of the elements increases as one moves down the first group of the periodic table.
  • D Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the periodic table.

Question - 6

Identify the correct order of the size of the following :

  • A Ca2+ < K+ < Ar < S2-< cl-
  • B Ca2+ < K+ < Ar < cl- < S2-
  • C Ar < Ca2+ < K+ < Cl- < S2-
  • D Ca2+ < Ar < K+ < Cl- < S2-

Question - 7

Ionic radii are :

  • A inversely proportional to effective nuclear charge
  • B inversely proportional to square of effective nuclear charge.
  • C directly proportional to effective nuclear charge.
  • D directly proportional to square of effective nuclear charge.

Question - 8

The ions O2-, F-, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show :

  • A an increase from O2- to F- and then decrease from Na+ to Al3+.
  • B a decrease from O2- to F- and then increase from Na+ to Al3+
  • C a significant increase from O2- to Al3+
  • D a Significant decrease from O2- to Al3+

Question - 9

In crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions?

  • A LiF
  • B CsF
  • C CsI
  • D LiI

Question - 10

The element with the atomic number 118, will be :

  • A alkali
  • B noble gas
  • C lanthanide
  • D transition element
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