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Classification of Elements and Periodicity in Properties

JEE Main 2025 (Online) 22nd January Morning ShiftMCQMedium📈 Topic in 8% papers+4−1
Ques. 1JEE 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

Answer

(3) Al<Mg<B<N

Solution

Mg (1.31) < Al (1.61), so "Al<Mg" is wrong.

Al<Mg<B<N is incorrect (correct: Mg<Al<B<N); the other orders rise correctly.

Answer: (3)

Keep practising — Classification of Elements and Periodicity in Properties

Ques. 2JEE 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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