MCQ
In benzene molecule all $C - C$ bond lengths are equal because
- AAll carbon atoms are equivalent
- BAll carbon atoms are $s{p^2}$ hybridised
- ✓All $C - C$ bonds in benzene, have same order
- DAll $C - C$ bonds are single covalent bond
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[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