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Classification of Elements and Periodicity in Properties

JEE Main 2025 (Online) 24th January Morning ShiftMCQEasy📈 Topic in 7% papers+4−1
Ques. 1JEE 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

Answer

(1) A, C and E Only

Solution

Modern periodic law: properties are periodic functions of atomic number.

A: atomic weight (Mendeleev) A is NOT true.

C: similar outer configuration same group, not same period C is NOT true.

E: period 2 has 4 orbitals but 8 elements (2 e- per orbital) E is NOT true.

B, D: true.

Answer: (1)

Keep practising — Classification of Elements and Periodicity in Properties

Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE 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. 6JEE 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
Ques. 7JEE Main 2024, 8 April (Morning Shift)

Match List I with List II Choose the correct answer from the options given below:

  1. A-III, B-II, C-I, D-IV
  2. A-II, B-I, C-IV, D-III
  3. A-II, B-III, C-IV, D-I
  4. A-IV, B-III, C-II, D-I
Ques. 8JEE Main 2024, 8 April (Evening Shift)

Identify the correct statements about p-block elements and their compounds. Choose the correct answer from the options given below :

  1. (B) and (D) only
  2. (B) and (E) only
  3. (D) and (E) only
  4. (A) and (C) only
Ques. 9JEE Main 2024, 6 April (Morning Shift)

The electron affinity values are negative for Choose the most appropriate answer from the options given below :

  1. A, B, D and E only
  2. D and E only
  3. A and D only
  4. A, B and C only
Ques. 10JEE Main 2024, 5 April (Morning Shift)

The statement(s) that are correct about the species O2-, F-, Na+ and Mg2+. Choose the most appropriate answer from the options given below :

  1. C and D only
  2. A, C and D only
  3. B, C and D only
  4. A, B, C and D
Ques. 11JEE Main 2024, 5 April (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 true
  2. Statement I is incorrect but Statement II is true
  3. Both Statement I and Statement II are false
  4. Statement I is correct but Statement II is false

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