Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The free gaseous Cr atom has six unpaired electrons. Reason: Half-filled s orbital has greater stability.A) If both assertion and reason are true and reason is not the correct explanation of assertion.
B) If both assertion and reason are true but reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false
Correct Answer: C
Solution :
The free gaseous Cr-atom has six-unpaired electron due to following electronic configuration. \[=[Ar]\,3{{d}^{5}},4{{s}^{1}}\] This configuration is more, stable because half filled \[d-\] orbitals are more stable.You need to login to perform this action.
You will be redirected in
3 sec