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JEE Main 2025 Jan 22 Shift 2, Chemistry Q14: Periodicity In Atomic Properties

JEE Main2025Jan 22, Shift 2Chemistry
Q.

Given below are two statements :

Statement (I) : An element in the extreme left of the periodic table forms acidic oxides.

Statement (II) : Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table.

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

  1. A

    Statement-I is false but Statement-II is true.

  2. B

    Both Statement-I and Statement-II are false.

  3. C

    Statement-I is true but Statement-II is false.

  4. D

    Both Statement-I and Statement-II are true.

Solution

Elements on the extreme left of the periodic table (alkali and alkaline earth metals) are strongly electropositive. Their oxides are basic (e.g. , react with water to give hydroxides). So Statement-I is false.

On moving left to right across a period, non-metallic character increases, and non-metal oxides are acidic. Reactive non-metals on the right (excluding the noble gases) form acidic oxides which react with water to give acids (e.g. , ). So Statement-II is true.

Statement-I is false but Statement-II is true.

Concept behind this question

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