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KCET2025ChemistryChemical Bonding and Molecular Structure

The electronic configuration of X and Y are given below: aligned & X: 1 s^2 2 s^2 2 p^6 3 s^2 3 p ^3 & Y: 1 ~s ^2 2 ~s ^2 2 p ^6 3 ~s ^2 3 ~s ^5 aligned Which of the following is the correct molecular formula and type of bond formed between X and Y ?

Options

  1. AX ₃ Y , ionic bond
  2. BX ₂ Y ₃ , coordinate bond
  3. CXY ₃ , covalent bond
  4. DX ₂ Y , covalent bond

Correct answer

C. XY ₃ , covalent bond

Step-by-step solution

aligned & x: 1 s^2 2 s^2 2 p^6 3 s^2 3 p^3 p & y: 1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 Cl aligned Valency of p =3 or 5 Valency of Cl =1 Possible molecules are PCl ₃ or PCl ₅ Both are covalent

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