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JEE Main202622 January 2026Evening ShiftChemistryp Block Elements (Group 13 & 14)Actual

Given below are two statements : Statement I : Elements ' X ' and ' Y ' are the most and least electronegative elements, respectively among N , As , Sb and P. The nature of the oxides X ₂ O ₃ and Y ₂ O ₃ is acidic and amphoteric, respectively. Statement II : BCl ₃ is covalent in nature and gets hydrolysed in water. It produces [ B ( OH )₄ ]⁻ and [ B ( H ₂ O )₆ ]³⁺ in aqueous medium. In the light of the above statemen

Options

  1. ABoth Statement I and Statement II are false
  2. BBoth Statement I and Statement II are true
  3. CStatement I is true but Statement II is false
  4. DStatement I is false but Statement II is true

Correct answer

C. Statement I is true but Statement II is false

Step-by-step solution

For Statement I: Among N, As, Sb, P, the electronegativity order is N > P > As > Sb. Thus X = N (most electronegative) and Y = Sb (least electronegative). N₂O₃ is acidic (forms HNO₂ with water) and Sb₂O₃ is amphoteric (reacts with both acids and bases). Statement I is true. For Statement II: While BCl₃ is covalent and hydrolyzes in water to form B(OH)₃ , the hydrolysis products are incorrect. In neutral aqueous medium, B(OH)₃ is formed. The tetrahedral [B(OH)₄]^- forms only in basic conditions, and boron does not f

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