MCQ
Number of $\pi$ electrons present in naphthalene is :
- A$2$
- B$4$
- ✓$10$
- D$14$
✓
Answer
Correct option: C.
$10$
c
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$1$ mole of conc. $HCl $ requires $X$ moles of dilute $NaOH$ for neutralisation and $1$ mole of concentrate ${H_2}S{O_4}$ requires $Y$ moles of small dilute $NaOH$ then which of the following reaction is true
→$\Delta_{\text {vap }} \mathrm{H}^{\ominus}$ for water is $+40.49 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at 1 bar and $100^{\circ} \mathrm{C}$. Change in internal energy for this vapourisation under same condition is. . . . . . . . . . $\mathrm{kJ}$ $\mathrm{mol}^{-1}$. (Integer answer) (Given $\mathrm{R}=8.3 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ )
→What will be the major product of each of the two reaction shown below ?
→$1.$ $\begin{array}{*{20}{c}}
{C{H_3}C{H_2}CHC{H_3}{\mkern 1mu} } \\
{{\mkern 1mu} \,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\,^ + }N{{(C{H_3})}_3}^ - OH}
\end{array}$ $\xrightarrow{{heat}}$ $\mathop {C{H_3}CH = CHC{H_3}}\limits_X $ $+$ $\mathop {C{H_3}C{H_2}CH = C{H_2}}\limits_Y $
$2.$ $\begin{array}{*{20}{c}}
{C{H_3}C{H_2}CHC{H_3}} \\
{\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,Br}
\end{array}$ $\xrightarrow{{heat}}$ $\mathop {C{H_3}CH = CHC{H_3}}\limits_X $ $+$ $\mathop {C{H_3}C{H_2}CH = C{H_2}}\limits_Y $
An exothermic reaction is one which
An alkyl halide may be converted into an alcohol by
The electroplating of chromium is undertaken because
${H^ + } + C{r_2}O_7^{2 - } + SO_3^{2 - } \to C{r^{ + 3}} + SO_4^{2 - } + {H_2}O$ In balance reaction coefficient of $H^+$ and $SO_4^{2-}$ will be respectively
→An organic compound has been found to possess the Empirical formula $C{H_2}O$ and molecular weight $90$. The molecular formula of it is $(C = 12,\,\,H = 1,\,{\rm{and}}\,\,O = 16)$
→According to $IUPAC$ system is named as
→Identify products of the given reactions
