MCQ
The electronic configuration of halogen is
- A$n{s^2}n{p^6}$
- B$n{s^2}n{p^3}$
- ✓$n{s^2}n{p^5}$
- D$n{s^2}$
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$(ii)$ Number of cyclic structural isomers with molecular formula $C_5H_{10} = Y$
$(iii)$ Number of ether with $M.F. C_4H_{10}O = Z ;X + Y + Z$ is

$\mathop C\limits^\Theta {H_3},\mathop N\limits^\Theta {H_2},\,\mathop O\limits^\Theta H,\,\mathop C\limits^\Theta l$
Assertion $A$ : Benzene is more stable than hypothetical cyclohexatriene.
Reason $R$ : The delocalized $\pi$ electron cloud is attracted more strongly by nuclei of carbon atoms. In the light of the above statements, choose the correct answer from the options given below: