MCQ
Circle represents most basic atoms in these molecule. Which of the following is correct representation ?
  • A

  • B

  • C

  • All of these

Answer

Correct option: D.
All of these
d
$(d)$ All $'N'$ atoms of circle have localised $l. p.$ which do not take part in resonance.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

$IUPAC $ name of $C{H_3} - CH = CH - COOH$
Which of the following is an isomer of compound $1$ ?

$\underset{(1)}{\mathop{C{{H}_{3}}C{{H}_{2}}CHO}}\,$   

$\underset{(2)}{\mathop{\begin{matrix}
   O  \\
   ||  \\
   C{{H}_{3}}-C-C{{H}_{3}}  \\
\end{matrix}}}\,$

$\underset{(3)}{\mathop{C{{H}_{3}}-CH=CH-OH}}\,$

Four species are listed below :

$i\,\, HCO_3$      $ii. \,H_3O^+$

$iii.\, HSO_4^-$       $iv.\, HSO_3F$

Which one of the following is the correct sequence of their acid strength?

Spectrum of $L{i^{2 + }}$ is similar to that of
Which of the following fractions of petroleum refining contains kerosene ? (Boiling ranges in $^oC$ are given below)
When orthoboric acid $({H_3}B{O_3})$ is heated, the residue left is
Two reactions are given below:

$2 \mathrm{Fe}_{(\mathrm{s})}+\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{Fe}_2 \mathrm{O}_{3(\mathrm{~s})}, \Delta \mathrm{H}^{\mathrm{o}}=-822 \mathrm{~kJ} / \mathrm{mol}$

$\mathrm{C}_{(\mathrm{s})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{CO}_{(\mathrm{g})}, \Delta \mathrm{H}^{\mathrm{o}}=-110 \mathrm{~kJ} / \mathrm{mol}$

Then enthalpy change for following reaction

$3\mathrm{C}_{(\mathrm{s})}+\mathrm{Fe}_2 \mathrm{O}_{3(\mathrm{~s})} \rightarrow 2 \mathrm{Fe}_{(\mathrm{s})}+3 \mathrm{CO}_{(\mathrm{g})}$

Which one of the following oxides is expected to exhibit paramagnetic behaviour ?
Structural formula for lewisite is
Given the chemical equilibrium, A ⇌ B + C, where ΔHrxn​ is negative, what effect increasing the temperature (at constant pressure) would have on the system at equilibrium?