Assertion A: 5f electrons can participate in bonding to a far greater extent than 4f electrons. Reason R: 5f orbitals are not as buried as 4f orbitals. [2023]

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Q.
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: $5 f$ electrons can participate in bonding to a far greater extent than $4 f$ electrons.

Reason R: $5 f$ orbitals are not as buried as $4 f$ orbitals.

In the light of the above statements, choose the correct answer from the options given below. [2023]

1 Both A and R are true but R is not the correct explanation of A

2 A is true but R is false

3 A is false but R is true

4 Both A and R are true and R is the correct explanation of A

Ans.
(4)

As number of valence shell is higher, electrons of its orbitals can participate in bonding in greater extents. $4 f$ electron is more shielded as compared to $5 f$ electrons. $5 f$ orbitals are not as buried as $4 f$ orbitals.

Solution

1 Both A and R are true but R is not the correct explanation of A

2 A is true but R is false

3 A is false but R is true

4 Both A and R are true and R is the correct explanation of A

Ans.
(4)

As number of valence shell is higher, electrons of its orbitals can participate in bonding in greater extents. $4 f$ electron is more shielded as compared to $5 f$ electrons. $5 f$ orbitals are not as buried as $4 f$ orbitals.

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Solution

1 Both A and R are true but R is not the correct explanation of A

2 A is true but R is false

3 A is false but R is true

4 Both A and R are true and R is the correct explanation of A

Ans. (4) As number of valence shell is higher, electrons of its orbitals can participate in bonding in greater extents. 4f electron is more shielded as compared to 5f electrons. 5f orbitals are not as buried as 4f orbitals.

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Ans.
(4)

As number of valence shell is higher, electrons of its orbitals can participate in bonding in greater extents. $4 f$ electron is more shielded as compared to $5 f$ electrons. $5 f$ orbitals are not as buried as $4 f$ orbitals.