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Classification of Elements and Periodicity in Properties

JEE Main 2025 (Online) 28th January Evening ShiftMCQEasy📈 Topic in 3% papers+4−1
Ques. 1JEE Main 2025, 28 January (Evening Shift)

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are false
  2. Statement I is false but Statement II is true
  3. Statement I is true but Statement II is false
  4. Both Statement I and Statement II are true

Answer

(1) Both Statement I and Statement II are false

Solution

Statement I: Newlands (Law of Octaves, 1865) arranged the elements in increasing order of their atomic weights; atomic numbers were not known then (Moseley, 1913) false.

Statement II: Lothar Meyer plotted physical properties such as atomic volume, melting point and boiling point against atomic weight (not atomic number) and observed a periodically repeated pattern false.

Both statements are false.

Answer: (1)

Keep practising — Classification of Elements and Periodicity in Properties

Ques. 2JEE Main 2025, 24 January (Morning Shift)

Which of the following statements are NOT true about the periodic table? Choose the correct answer from the options given below:

  1. A, C and E Only
  2. A and E Only
  3. B, C and E Only
  4. D and E Only
Ques. 3JEE Main 2025, 24 January (Evening Shift)

The successive 5 ionisation energies of an element are 800, 2427, 3658, 25024 and 32824 kJ/mol, respectively. By using the above values predict the group in which the above element is present :

  1. Group 4
  2. Group 2
  3. Group 13
  4. Group 14
Ques. 4JEE Main 2025, 23 January (Morning Shift)

The element that does not belong to the same period of the remaining elements (modern periodic table) is:

  1. Platinum
  2. Osmium
  3. Iridium
  4. Palladium
Ques. 5JEE Main 2025, 22 January (Morning Shift)

Match List-I with List-II.

  1. A-IV, B-I, C-II, D-III
  2. A-III, B-IV, C-II, D-I
  3. A-II, B-III, C-IV, D-I
  4. A-IV, B-I, C-III, D-II
Ques. 6JEE Main 2025, 22 January (Morning Shift)

Which of the following electronegativity order is incorrect?

  1. S<Cl<O<F
  2. Al<Si<C<N
  3. Al<Mg<B<N
  4. Mg<Be<B<N
Ques. 7JEE Main 2025, 22 January (Evening Shift)

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are false
  2. Both Statement I and Statement II are true
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true

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