Assertion: Zr and Hf occur together in nature and are difficult to separate. Reason: Zr and Hf have identical radii due to lanthanide contraction.

Question

Assertion: Zr and Hf occur together in nature and are difficult to separate. Reason: Zr and Hf have identical radii due to lanthanide contraction. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion

Q. Assertion : Zr and Hf occur together in nature and are difficult to separate. Reason : Zr and Hf have identical radii due to lanthanide contraction.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion

Q. Assertion : $Z r$ and $H f$ occur together in nature and are difficult to separate.
Reason : $Z r$ and $H f$ have identical radii due to lanthanide contraction.