Multiple choice

Assertion (A): The first ionisation enthalpies of third transition series is higher than those of first and second transition series. Reason (R): The atoms of elements of third transition series possess filled 4f-orbitals.

Directions: In the following question, there are two statements: Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as

1. if A and R both are correct and R is the correct explanation of A
2. if A and R both are correct and R is not the  correct explanation of A
3. if A is correct and R is incorrect
4. if A is incorrect and R is correct
5. if A and R both are incorrect

  1. 1

  2. 2

  3. 3

  4. 4

  5. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first ionisation enthalpies of third transition series are higher than those of first and second transition series because the atoms of elements of third transition series possess filled 4f-orbitals.

Keep practicing — related questions