JEE Main 2021 (Online) 16th March Morning Shift | d and f Block Elements Question 123 | Chemistry

Given below are two statements :

Statement I : The E^o value for Ce⁴⁺ / Ce³⁺ is + 1.74 V.

Statement II : Ce is more stable in Ce⁴⁺ state than Ce³⁺ state.

In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is incorrect but statement II is correct

Both statement I and statement II are correct

Both statement I and statement II are incorrect

Statement I is correct but statement II is incorrect

JEE Main 2021 (Online) 16th March Morning Shift

MCQ (Single Correct Answer)

-1

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

Assertion A : Size of Bk³⁺ ion is less than Np³⁺ ion.

Reason R : The above is a consequence of the lanthanoid contraction.

In the light of the above statements, choose the correct answer from the options given below :

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

A is false but R is true

A is true but R is false

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

JEE Main 2021 (Online) 26th February Morning Shift

MCQ (Single Correct Answer)

-1

Which one of the following lanthanoids does not form MO₂? [M is lanthanoid metal]

JEE Main 2021 (Online) 25th February Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : CeO₂ can be used for oxidation of aldehydes and ketones.

Statement II : Aqueous solution of EuSO₄ is a strong reducing agent.

In the light of the above statements, choose the correct answer from the options given below :

Statement I is true but Statement II is false.

Statement I is false but Statement II is true

Both Statement I and Statement II are false

Both Statement I and Statement II are true

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