MCQ
The reason for stability of $Ce ^{4+}$ is :
- A$4 f^7$ configuration
- ✓$4 f^{10}$ configuration
- C$4 f^{14}$
- D$4 f^7 6 s^2$
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Assertion $(A):$ Gabriel phthalimide synthesis cannot be used to prepare aromatic primary amines.
Reason $(R) :$ Aryl halides do not undergo nucleophilic substitution reaction.
In the light of the above statements, choose the correct answer form the options given below.
Reason : Oxidation state of $Cr$ in $Na_2CrO_4$ is $+VI$