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  • Two statements are given in the following question one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below : <s

Two statements are given in the following question one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below :

Assertion (A) : \mathrm{\left[P t(e n)_{2} Cl _{2}\right]^{2+}}complex is less stable than \mathrm{\left[ Pt \left( NH _{3}\right)_{4} C l_{2}\right]^{2+}} complex.

Reason (R) : \mathrm{\left[P t(e n)_{2} Cl _{2}\right]^{2+}}complex shows chelate effect.

Option: 1

Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).


Option: 2

Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).


Option: 3

Assertion (A) is correct, but Reason (R) is incorrect statement.


Option: 4

Assertion (A) is incorrect, but Reason (R) is correct statement.


Answers (1)

best_answer

As we have learnt, 

\mathrm{\left[P t(e n)_{2} Cl _{2}\right]^{2+}}contains bidentate ligand, \mathrm{en} (ethylene diamine) which is capable of showing chelation while \mathrm{\left[P t(NH_3)_{4} Cl _{2}\right]^{2+}} does not show chelation as it contains all monodentate ligands.

Thus, \mathrm{\left[P t(e n)_{2} Cl _{2}\right]^{2+}}is more stable than \mathrm{\left[P t(NH_3)_{4} Cl _{2}\right]^{2+}} and hence, Assertion (A) is incorrect while Reason (R) is correct.

Hence, the correct answer is Option (4)

Posted by

Divya Prakash Singh

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