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Periodic Classification of Elements

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Questions

Question 1 Multiple Choice (Single Answer)

Which is the longest period in the modern periodic table?

  1. 5
  2. 6
  3. 7
  4. 4
Question 2 Multiple Choice (Single Answer)

How many elements are present in the 3rd period of the modern periodic table?

  1. 18
  2. 32
  3. 28
  4. 8
Question 3 Multiple Choice (Single Answer)

How does electron affinity change down a group in the modern periodic table?

  1. No change
  2. Increases
  3. First increases then decreases
  4. Decreases
Question 4 Multiple Choice (Single Answer)

How does ionisation energy change as we go down a group in the modern periodic table?

  1. Increases
  2. Decreases
  3. No change
  4. First increases and then decreases
Question 5 Multiple Choice (Single Answer)

How does metallic character change down a group in the modern periodic table?

  1. Increases
  2. First increases and then decreases
  3. Decreases
  4. No change
Question 6 Multiple Choice (Single Answer)

According to their position in the periodic table, which of the following elements would show the maximum metallic character?

C, O, F, B, Be

  1. C
  2. O
  3. F
  4. Be
Question 7 Multiple Choice (Single Answer)

What was the first criteria for classification of the elements ?

  1. Increasing atomic masses
  2. Increasing atomic numbers
  3. Metals and Non Metals
  4. Decreasing atomic masses
Question 8 Multiple Choice (Single Answer)

Who discovered the law of octaves ?

  1. Johann Wolfgang
  2. Dmitri Ivanovich Mendeleev
  3. John Newlands
  4. Henry Moseley
Question 9 Multiple Choice (Single Answer)

For similarities in chemical properties, why did Mendeleev concentrated on the oxides and hydrides of the elements?

  1. Oxygen and hydrogen were his favourite elements .
  2. Oxygen and hydrogen are gases.
  3. Oxygen and hydrogen were highly reactive in nature and formed compounds with almost every element.
  4. Oxygen and hydrogen were old elements.
Question 10 Multiple Choice (Single Answer)

How many groups and periods did Mendeleev's periodic table contain?

  1. 6 , 8.
  2. 9, 7.
  3. 6 , 7.
  4. 7 , 6.
Question 11 Multiple Choice (Single Answer)

In modern periodic table , what happens when we go from left to right in a period ?

  1. Atomic size increases
  2. Atomic size decreases
  3. No change in atomic size
  4. Atomic size first increases and then decreases
Question 12 Multiple Choice (Single Answer)

Where did Dobereiner studied chemistry ?

  1. Munchberg
  2. Germany
  3. Strasbourg
  4. Italy
Question 13 Multiple Choice (Single Answer)

What was the criteria used by Mendeleev in creating his periodic table?

  1. Atomic number
  2. Valence shells
  3. Atomic masses
  4. As per his wish
Question 14 Multiple Choice (Single Answer)

Which one of the following groups {set of elements} satisfies Dobereiners law?

  1. N , O , C
  2. Ca , Ba, Sr
  3. H , He, Li
  4. Ca, Sr , Ba
Question 15 Multiple Choice (Single Answer)

How many groups are present in the long form of the periodic table ?

  1. 16
  2. 17
  3. 18
  4. 19
Question 16 Multiple Choice (Single Answer)

How many elements are present in the 7 th period of the modern periodic table?

  1. 27
  2. 28
  3. 26
  4. 29
Question 17 Multiple Choice (Single Answer)

How many elements are present in the 6th period of the periodic table?

  1. 31
  2. 32
  3. 30
  4. 28
Question 18 Multiple Choice (Single Answer)

How many elements were known when Mendeleev classified the elements ?

  1. 61
  2. 62
  3. 63
  4. 64
Question 19 Multiple Choice (Single Answer)

In the modern periodic table ,which are the metals among the first ten elements?

  1. H & He
  2. Li & Be
  3. B & C
  4. N & O
Question 20 Multiple Choice (Single Answer)

Element X belongs to group 2 of the periodic table. What is the valency of X?

  1. 1
  2. 2
  3. 3
  4. 5
Question 21 Multiple Choice (Single Answer)

What does each period in the periodic table indicates ?

  1. +1 electron
  2. +1 new shell
  3. -1 electron
  4. -1 shell
Question 22 Multiple Choice (Single Answer)

What is the valency of Y, if it belongs to group 15?

  1. 1
  2. 2
  3. 3
  4. 4
Question 23 Multiple Choice (Single Answer)

How many elements are present in the 5th period of the periodic table ?

  1. 18
  2. 32
  3. 28
  4. 8
Question 24 Multiple Choice (Single Answer)

How many periods are present in the modern periodic table?

  1. 6
  2. 7
  3. 8
  4. 9
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