MCQ
The test used to distinguish primary, secondary and tertiary amines is:
- ASandmayer's reaction
- BCarbylamine reaction
- CMustard oil test
- DC6H5SO2Cl
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$(I)$ Ortho -nitrophenol
$(II)$ Para -nitrophenol
$(III)$ Meta- nitrophenol
[Atomic numbers of $Cr =24$ and $Mn =25$ ]
$(A)$ $Cr ^{2+}$ is a reducing agent
$(B)$ $Mn ^{3+}$ is an oxidizing agent
$(C)$ Both $Cr ^{2+}$ and $Mn ^{3+}$ exhibit $d^4$ electronic configuration
$(D)$ When $Cr ^{2+}$ is used as a reducing agent, the chromium ion attains $d^5$ electronic configuration
