JEE Main 2021 (Online) 25th July Morning Shift | Periodic Table & Periodicity Question 40 | Chemistry

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JEE Main 2021 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

-1

The ionic radii of K⁺, Na⁺, Al³⁺ and Mg²⁺ are in the order:

Na⁺ < K⁺ < Mg²⁺ < Al³⁺

Al³⁺ < Mg²⁺ < K⁺ < Na⁺

Al³⁺ < Mg²⁺ < Na⁺ < K⁺

K⁺ < Al³⁺ < Mg²⁺ < Na⁺

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

-1

Which one of the following statements for D.I. Mendeleeff, is incorrect?

He authored the textbook - Principles of Chemistry

At the time, he proposed Periodic Table of elements structure of atom was known.

Element with atomic number 101 is named after him.

He invented accurate barometer.

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

-1

The set having ions which are coloured and paramagnetic both is -

Cu²⁺, Cr³⁺, Sc⁺

Cu²⁺, Zn²⁺, Mn⁴⁺

Sc³⁺, V⁵⁺, Ti⁴⁺

Ni²⁺, Mn⁷⁺, Hg²⁺

JEE Main 2021 (Online) 18th March Evening Shift

MCQ (Single Correct Answer)

-1

The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. The elements X, Y and Z, respectively, are :

neon, sodium and chlorine

argon, chlorine and sodium

chlorine, lithium and sodium

argon, lithium and sodium

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