JEE Main 2021 (Online) 31st August Evening Shift | Periodic Table & Periodicity Question 24 | Chemistry

JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-1

The Eu²⁺ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu = 63]

4f⁷6s²

4f⁶

4f⁷

4f⁶6s²

JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-1

Match List - I with List - II :

	List - I (Metal Ion)		List - II (Group of Qualitative analysis)
(a)	$$M{n^{2 + }}$$	(i)	Group - III
(b)	$$A{s^{3 + }}$$	(ii)	Group - IIA
(c)	$$C{u^{2 + }}$$	(iii)	Group - IV
(d)	$$A{l^{3 + }}$$	(iv)	Group - IIB

Choose the most appropriate answer from the options given below :

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature ? (Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58)

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period.

Reason (R) : It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.

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

(A) is false but (R) is true.

(A) is true but (R) is false

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

PREVIOUS NEXT