JEE Main 2020 (Online) 5th September Evening Slot | Periodic Table & Periodicity Question 56 | Chemistry

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JEE Main 2020 (Online) 5th September Evening Slot

MCQ (Single Correct Answer)

-1

The correct order of the ionic radii of
O^2–, N^3–, F^– , Mg²⁺, Na⁺ and Al³⁺ is :

N^3– < O^2– < F^– < Na⁺ < Mg²⁺ < Al³⁺

N^3– < F^– < O^2– < Mg²⁺ < Na⁺ < Al³⁺

Al³⁺ < Na⁺ < Mg²⁺ < O^2– < F^– < N^3–

Al³⁺ < Mg²⁺ < Na⁺ < F^– < O^2– < N^3–

JEE Main 2020 (Online) 4th September Evening Slot

MCQ (Single Correct Answer)

-1

The incorrect statement(s) among (a) - (c) is (are)

(a) W(VI) is more stable than Cr(VI).
(b) In the presence of HCl, permanganate titrations provide satisfactory results.
(c) Some lanthanoid oxides can be used as phosphors.

(a) and (b) only

(a) only

(b) only

(b) and (c) only

JEE Main 2020 (Online) 4th September Morning Slot

MCQ (Single Correct Answer)

-1

The elements with atomic numbers 101 and 104 belong to, respectively :

Group 6 and Actinoids

Actinoids and Group 4

Group 11 and Group 4

Actinoids and Group 6

JEE Main 2020 (Online) 4th September Morning Slot

MCQ (Single Correct Answer)

-1

The ionic radii of O^2–, F^–, Na⁺ and Mg²⁺ are in the order :

F^– > O^2– > Na⁺ > Mg²⁺

Mg²⁺ > Na⁺ > F^– > O^2–

O^2– > F^– > Mg²⁺ > Na⁺

O^2– > F^– > Na⁺ > Mg²⁺

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