- A$N_3^-$
- ✓$NO_3^-$
- C$NO_2^-$
- D$CO_2$

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Statement $I :$ $o-$Nitrophenol is steam volatile due to intramolecular hydrogen bonding.
Statement $II :$ $o-$Nitrophenol has high melting due to hydrogen bonding.
In the light of the above statements, choose the most appropriate answer from the options given below
$A$. Atoms of all elements are composed of two fundamental particles.
$B$. The mass of the electron is $9.10939 \times 10^{-31} kg$.
$C$. All the isotopes of a given element show same chemical properties:
$D$. Protons and electrons are collectively known as nucleons.
$E$. Dalton's atomic theory, regarded the atom as an ultimate particles of matter Choose the correct answer from the options given below
$\begin{array}{*{20}{c}}
{{{(C{H_3})}_2}CH - C{H_2}CH = CH - CH - CHC{H_3}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{C_2}{H_5}}
\end{array}$