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Classification of Elements

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Questions

Question 1 Multiple Choice (Single Answer)

The cause of periodicity is

  1. the increase in atomic number
  2. the increase in atomic mass
  3. the number of electrons in the valence shell
  4. the recurrence of similar outer most electronic configurations
Question 2 Multiple Choice (Single Answer)

Which of the following elements has highest electron affinity?

  1. Na
  2. K
  3. CI
  4. F
Question 3 Multiple Choice (Single Answer)

Which of the following characterstics decrease in going down the group?

  1. Atomic size
  2. Boiling point
  3. Electro negativity
  4. None of these
Question 4 Multiple Choice (Single Answer)

Which period of the periodic table, contains maximum number of elements?

  1. Fourth
  2. Fifth
  3. Sixth
  4. Seven
Question 5 Multiple Choice (Single Answer)

If the valence shell electronic structure of an element is ns2np5, the element will belong to the group of

  1. alkali metals
  2. halogens
  3. alkaline earth metals
  4. noble gases
Question 6 Multiple Choice (Single Answer)

The elements arranged in two rows at the bottom of the periodic table are

  1. not assigned any period
  2. not assigned any group
  3. f-block elements
  4. None of these
Question 7 Multiple Choice (Single Answer)

Directions: The following question has four choices out of which ONLY ONE is correct.

The element whose configuration is 1s2, 2s2, 2p6, 3s2 is

  1. a metal
  2. a metalloid
  3. an inert gas
  4. a non-metal
Question 8 Multiple Choice (Single Answer)

Which of the following is least electro negative?

  1. Fluorine
  2. Oxygen
  3. Carbon
  4. Nitrogen
Question 9 Multiple Choice (Single Answer)

The common feature in the elements of same group is

  1. atomic number
  2. number of electronic shells
  3. atomic size
  4. number of valence electrons
Question 10 Multiple Choice (Single Answer)

Which of the following elements has greatest tendency to lose electron?

  1. F
  2. Be
  3. K
  4. Mg
Question 11 Multiple Choice (Single Answer)

Electron affinity is positive when

  1. O- is formed from O
  2. O2- is formed from O
  3. O+ is formed from O
  4. None of these
Question 12 Multiple Choice (Single Answer)

Which of the following elements has the smallest size?

  1. C
  2. N
  3. O
  4. S
Question 13 Multiple Choice (Single Answer)

Which of the following pair of atomic numbers represent s-block elements?

  1. 6, 12
  2. 7, 15
  3. 9, 16
  4. 11, 12
Question 14 Multiple Choice (Single Answer)

Which of the following elements is most electro negative?

  1. Oxygen
  2. Chlorine
  3. Nitrogen
  4. Fluorine
Question 15 Multiple Choice (Single Answer)

The element with atomic number 15 is a

  1. metal
  2. non metal
  3. metalloid
  4. semiconductor
Question 16 Multiple Choice (Single Answer)

Which of the following elements, Na+, Mg+2, K+ and Al +3 has the least size?

  1. Na+
  2. Mg+2
  3. K+
  4. Al+3
Question 17 Multiple Choice (Single Answer)

The lightest metal is

  1. Li
  2. Al
  3. Ca
  4. Mg
Question 18 Multiple Choice (Single Answer)

An element with atomic number 13 has

  1. 13 neutrons in the nucleus
  2. three valence electrons
  3. 13 electrons in the valence shell
  4. three unpaired electrons
Question 19 Multiple Choice (Single Answer)

Which of the following has a variable valency?

  1. Sodium
  2. Aluminum
  3. Oxygen
  4. Copper
Question 20 Multiple Choice (Single Answer)

The number of electrons in the outermost shell of elements of the same group is

  1. always similar
  2. always different
  3. sometimes similar
  4. None of these
Question 21 Multiple Choice (Single Answer)

In a period, as we proceed from left to right

  1. the metallic character of elements increases
  2. the metallic character of elements decreases
  3. the metallic character does not changes
  4. the metallic character first decreases then increases
Question 22 Multiple Choice (Single Answer)

The horizontal rows of elements, in the periodic table are called

  1. groups
  2. horizontal lines
  3. shells
  4. periods
Question 23 Multiple Choice (Single Answer)

Which of the following elements has the maximum value of first ionization potential?

  1. K
  2. N
  3. O
  4. None of these
Question 24 Multiple Choice (Single Answer)

Which of the following elements belong to the actinide series?

  1. Ac, Th, Pa
  2. La, Ce, Pr
  3. F, CI, Pr
  4. Sc, Ti, V
Question 25 Multiple Choice (Single Answer)

Which of the following options has the elements belonging to the Lanthanide series?

  1. F, CI, Br
  2. La, Ce, Pr
  3. Ac, Th, Pa
  4. H, Li, Na
Question 26 Multiple Choice (Single Answer)

Which of the following options contain the members of the same group in the periodic table?

  1. B, C, N
  2. Na, Mg, Al
  3. F, CI, I
  4. Be, Mg, K
Question 27 Multiple Choice (Single Answer)

Which of the following pairs are chemically similar?

  1. Ca & Zn
  2. Na & K
  3. Cl & P
  4. N & S
Question 28 Multiple Choice (Single Answer)

Which of the following elements has the highest negative value of electron gain enthalpy?

  1. O
  2. S
  3. Se
  4. Te
Question 29 Multiple Choice (Single Answer)

Which of the following alkali metals becomes liquid at 150 C?

  1. K
  2. Cs
  3. Na
  4. Ba
Question 30 Multiple Choice (Single Answer)

The electronic configuration 2, 8, 7 belongs to which period of the periodic table?

  1. Second
  2. Third
  3. Fourth
  4. None of these
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