Question

Statement - I: 1st ionization energy of ''P'' is greater than ''S''
Statement - II: $Z_{eff}$ value of ''S'' is greater than ''P''

• A. Statement - I is true; Statement - II is true; Statement - II is correct explanation for Statement - I
• B. Statement - I is true; Statement - II is true; Statement - II is NOT the correct explanation for statement - I
• C. Statement - I is true; Statement - II is false
• D. Statement - I is false; Statement - II is true

Answer 1

The correct option is B

Statement - I is true; Statement - II is true; Statement - II is NOT the correct explanation for statement - I

$P$ and $S$ belong to the same period but different groups. In the elemental form, the latter has a higher number of electrons and protons. Both the statements are correct but the second one doesn't explain the first one correctly.