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p -Block elements - ll — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
Given two statements below :

Statement $I:$ In $Cl _{2}$ molecule the covalent radius is double of the atomic radius of chlorine.

Statement $II:$ Radius of anionic species is always greater than their parent atomic radius.

Choose the most appropriate answer from options given below :

  • A
    Both Statement $I$ and Statement $II$ are correct.
  • B
    Both Statement $I$ and Statement $II$ are incorrect.
  • C
    Statement $I$ is correct but Statement $II$ is incorrect.
  • D
    Statement $I$ is incorrect but Statement $II$ is correct.
✓

Answer

In $Cl _{2}$ molecule, the covalent radius is half of the internuclear distance, so statement $(I)$ is false.

For the same element, anion has lower effective nuclear charge than atom $\Rightarrow$ so anion is larger than atom. $\Rightarrow$ statement $(II)$ is correct.

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