JEE Main 2022 (Online) 27th June Morning Shift | Periodic Table & Periodicity Question 21 | Chemistry

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JEE Main 2022 (Online) 27th June 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) : The ionic radii of O^2$$-$$ and Mg²⁺ are same.

Reason (R) : Both O^2$$-$$ and Mg²⁺ are isoelectronic species.

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

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

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

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

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

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

-1

The correct order of electron gain enthalpies of Cl, F, Te and Po is

F < Cl < Te < Po

Po < Te < F < Cl

Te < Po < Cl < F

Cl < F < Te < Po

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d⁵ :

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

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