JEE Main 2021 (Online) 17th March Morning Shift | d and f Block Elements Question 121 | Chemistry

Given below are two statements :

Statement I : Potassium permanganate on heating at 573K forms potassium manganate.

Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.

In the light of the above statements, choose the most appropriate 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

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

-1

Fex₂ and Fey₃ are known when x and y are :

x = F, Cl, Br, I and y = F, Cl, Br, I

x = F, Cl, Br and y = F, Cl, Br, I

x = F, Cl, Br, I and y = F, Cl, Br

x = Cl, Br, I and y = F, Cl, Br, I

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

-1

Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system.

(Atomic numbers Ce = 58, Gd = 64 and Eu = 63)

(a) (NH₄)₂[Ce(NO₃)₆]

(b) Gd(NO₃)₃ and

(c) Eu(NO₃)₃

(a) < (b) < (c)

(b) < (a) < (c)

(a) < (c) < (b)

JEE Main 2021 (Online) 16th March Morning Shift

MCQ (Single Correct Answer)

-1

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

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