JEE Main 2021 (Online) 25th July Evening Shift | Periodic Table & Periodicity Question 63 | Chemistry

The ionic radii of F^$$-$$ and O^2$$-$$ respectively are 1.33$$\mathop A\limits^o $$ and 1.4$$\mathop A\limits^o $$, while the covalent radius of N is 0.74$$\mathop A\limits^o $$.

The correct statement for the ionic radius of N^3$$-$$ from the following is :

It is smaller than F^$$-$$ and N

It is bigger than O2^$$-$$ and F^$$-$$

It is bigger than F^$$-$$ and N, but smaller than of O^2$$-$$

It is smaller than O^2$$-$$ and F^$$-$$, but bigger than of N

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) 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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