New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

D and F Block Elements question

2021 · 16 Mar · Shift 1 · Q12

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Chemistry
D and F Block Elements
2021 · 16 Mar · Shift 1 · Q12

D and F Block Elements question

2021 · 16 Mar · Shift 1 · Q12

JEE MainChemistryD and F Block ElementsMCQ+4 / −1

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

Bk^{3+}

ion is less than

Np^{3+}

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 :

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

More from D and F Block Elements

Given below are two statements : Statement I : The Eo value for $C e^{4 +}$ / $C e^{3 +}$ is + 1.74 V. Statement II : Ce is more stable in $C e^{4 +}$ state than $C e^{3 +}$ state. In the light of the above statements, choose the most appropriate…2021 · MCQ
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) $(N H_{4})_{2} [C e (N O_{3})_{6}]$ (b) $G d (N O_{3})_{3}$ and (c) $E u (N O_{3})_{3}$ …2021 · MCQ
Fex2 and Fey3 are known when x and y are :2021 · MCQ
What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous solution?2021 · MCQ
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…2021 · MCQ
The common positive oxidation states for an element with atomic number 24, are :2021 · MCQ
In the ground state of atomic Fe(Z = 26), the spin-only magnetic moment is $\times$ 10 $-$ 1 BM. (Round off to the Nearest Integer). [Given : $3$ = 1.73, $2$ = 1.41 ]2021 · Numerical
Match List - I with List - II Choose the most appropriate answer from the options given below : Includes table2021 · MCQ