MCQ
Which of the following molecule has intramolecular $H$ -bonding ?
- ✓Orth-nitrophenol
- BOrtho-boric acid
- CBoth $(A)$ & $(B)$
- DNone of these

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Name $IUPAC$ Official Name
$(a)$ Unnilunium $(i)$ Mendelevium
$(b)$ Unniltrium $(ii)$ Lawrencium
$(c)$ Unnilhexlum $(iii)$ Seaborglum
$(d)$ Unununnium $(iv)$ Darmstadtium
$(1)$ $C{H_3}CH = CHC{H_2}C{H_3}$ $ \xrightarrow{HBr} $
$(2)$ $C{H_3}C{H_2}CH = C{H_2}$ $ \xrightarrow{HBr} $
$(3)$ $C{H_3}CH = CHC{H_3}$ $ \xrightarrow{Br_2} $
$(4)$ $C{H_3}C{H_2}CH = C{H_2}\mathop {}\limits_{{\rm{}}} $ $ \xrightarrow[Proxide]{HBr} $