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Periodic Table and Periodicity question

2025 · 22 Jan · Shift 2 · Q17
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Periodic Table and Periodicity question

2025 · 22 Jan · Shift 2 · Q17

JEE MainChemistryPeriodic Table and PeriodicityMCQ+4 / −1
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
    Both Statement I and Statement II are false
  2. B
    Both Statement I and Statement II are true
  3. C
    Statement I is true but Statement II is false
  4. D
    Statement I is false but Statement II is true
View written solutionFree

Correct answer: D

  1. Analyze Statement (I)

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

    • Elements at the extreme left of the periodic table are mainly alkali metals (Group 1).
    • Their oxides are generally basic in nature.
    • Example: Na2O+H2O→2NaOH\mathrm{Na_2O + H_2O \rightarrow 2NaOH}Na2​O+H2​O→2NaOH
    • Since these oxides produce bases with water, they are basic oxides, not acidic oxides.

    Therefore, Statement (I) is false.

  2. Analyze Statement (II)

    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.

    • The extreme right of the periodic table contains non-metals (ignoring noble gases at the far end, the reactive non-metals like halogens are on the right side).
    • Oxides of non-metals are generally acidic oxides.
    • When such oxides react with water, they form acids.
    • Example: SO3+H2O→H2SO4\mathrm{SO_3 + H_2O \rightarrow H_2SO_4}SO3​+H2​O→H2​SO4​ Cl2O7+H2O→2HClO4\mathrm{Cl_2O_7 + H_2O \rightarrow 2HClO_4}Cl2​O7​+H2​O→2HClO4​

    Therefore, Statement (II) is true.

  3. Choose the correct option

    • Statement (I) is false
    • Statement (II) is true

    Hence, the correct option is: D\boxed{\text{D}}D​

  4. Comparison with stored answer

    • Derived answer: D
    • Stored correct answer: D

    They match.

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