The ionic radii of ${\mathrm{K}}^{+},{\mathrm{Na}}^{+},{\mathrm{Al}}^{3+}$ and ${\mathrm{Mg}}^{2+}$ are in the order :

Important Questions on Classification of Elements and Periodicity in Properties

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 24 Feb 2021 Shift 1>Q 37

Consider the elements $\mathrm{Mg},$ $\mathrm{Al},\mathrm{S},\mathrm{P}$ and $\mathrm{Si},$ the correct increasing order of their first ionisation enthalpy is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 22 July 2021 Shift 1>Q 38

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

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 2 September 2020 Shift 2>Q 39

Three elements $\mathrm{X},\mathrm{Y}$ and $\mathrm{Z}$ are in the $3^{\text{rd }}$period of the periodic table. The oxides of$\mathrm{X},\mathrm{Y}$ and $\mathrm{Z}$, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 2 September 2020 Shift 1>Q 40

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 19th April 2014>Q 41

Which one of the following has largest ionic radius ?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 15th April 2018>Q 42

For ${\mathrm{Na}}^{+}, {\mathrm{Mg}}^{2+},\mathrm{ }{\mathrm{F}}^{-}$ and ${\mathrm{O}}^{2-}$, the correct order of increasing ionic radii is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 12th January 2019 Shift 2>Q 43

The correct order of atomic radii is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 12th April 2019 Shift 2>Q 44

In comparison to boron, beryllium has: