MCQ
The $IUPAC$ name of (figure) is


- ✓$2, 6-$ Dimethylhepta $-2, 5-$ dienoic acid
- B$3, 7-$ Dimethylhepta $-2, 5-$ dienoic acid
- C$1-$ Hydroxy $-2, 6-$ dimethylhepta $-2, 5-$ dienone
- Dnone of these

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$(1)$ $(CH_3)_3 {\bar{\ddot{C}}}$
$(2)$ ${(C{H_3})_2}{\bar {\ddot {CH}}}$
$(3) $ $C{H_3}{\bar{\ddot{C{H_2}}}}$
$(4)$ ${C_6}{H_5}{\bar{\ddot{C{H_2}}}}$ is
[nearest integer]
(Given: atomic mass of $N =14\, g \,mol ^{-1}$ and of $O$ $=16\, g\, mol ^{-1}$.
Molar heat capacity of $N _{2} O$ is $100\, JK ^{-1}\, mol ^{-1}$ )