MCQ
The compound that is most reactive towards electrophilic nitration is
- ✓Toluene
- BBenzene
- CBenzoic acid
- DNitrobenzene

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$(i)$ Magnetic quantum no. $(m_l )$ gives information about the spatial orientation of orbitals with respect to standard set of co-ordinate axis.
$(ii)$ Electron spin quantum no. is represented by '$s$' and have value' $\frac{1}{2}$ '
$(iii)$ Principal quantum no. $(n)$ determine the size of the orbitals and also to a large extent of the energy of the orbitals.