JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
Given below are two statements:
Statement-I: The first ionization enthalpy of Cr is lower than that of Mn.
Statement-II: The second and third ionization enthalpies of Cr are higher than those of Mn.
In the light of the above statements, choose the correct answer from the options given below :
- A Both Statement-I and Statement-II are false.
- B Statement-I is true but Statement-II is false.
- C Both Statement-I and Statement-II are true.
- D Statement-I is false but Statement-II is true.
Answer & Solution
Correct Answer
(B) Statement-I is true but Statement-II is false.
Step-by-step Solution
Detailed explanation
\(Cr = (Ar)3d^{5}4s^{1}\) \(Mn = (Ar)3d^{5}4s^{2}\) \(IE_{1}(Cr) IE_{2}(Mn)\) \(IE_{3}(Cr) < IE_{3}(Mn)\)
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