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Assertion : Yb+2 is more stable in compare to Gd+2Reason : The electronic configuration of Gd is [Xe] 4f7 5d2 6s2.(1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.

Answer»

Correct option (3) If assertion is true but reason is false.

Explanation:

Yb+2 = [Xe]4f14, 5d0 , 6s0 

 Gd+2 = [Xe]4f7 , 5d1, 6s0 

so Yb+2 is more stable than Gd+2



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