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JEE MAIN 2022
27-07-2022 S1
Question
The incorrect statement is
Select the correct option:
A
The first ionization enthalpy of K is less than that of Na and Li
B
Xe does not have the lowest first ionization enthalpy in its group
C
The first ionization enthalpy of element with atomic number 37 is lower than that of the element with atomic number 38.
D
The first ionization enthalpy of Ga is higher than that of the d-block element with atomic number 30.
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
Ionization enthalpy order : $$ \begin{aligned} & \mathrm{Li}>\mathrm{Na}>\mathrm{K} \\ & \mathrm{He}>\mathrm{Ne}>\mathrm{Ar}>\mathrm{Kr}>\mathrm{Xe}>\mathrm{Rn} \\ & \mathrm{Sr}>\mathrm{Rb} \\ & \mathrm{Zn}>\mathrm{Ga} \end{aligned} $$
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