MCQ
An aromatic compounds among other things should have a $\pi $- electron cloud containing electrons where $n$ can't be
- ✓$0.5$
- B$3$
- C$2$
- D$1$
✓
Answer
Correct option: A.
$0.5$
a
(a) According to Huckel ruel, all aromatic compounds must have $(4n + 2)\pi $ electrons where $n$ is an integer, i.e., $n = 0,\,1,\,2,\,3,\,...$ and possesses unusual stability due to the complete delocalisation of $\pi $- electrons.
(a) According to Huckel ruel, all aromatic compounds must have $(4n + 2)\pi $ electrons where $n$ is an integer, i.e., $n = 0,\,1,\,2,\,3,\,...$ and possesses unusual stability due to the complete delocalisation of $\pi $- electrons.
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
The $pH$ of the solution containing $50\, mL$ each of $0.10\, M$ sodium acetate and $0.01\, M$ acetic acid is $.......$
→[Given $pK _{ a }$ of $CH _{3} COOH =4.57$ ]
The increasing order of the atomic radii of the following elements is
→$(a)\; C \;\;(b)\; O \;\;(c)\; F\;\; (d) \;Cl\;\; (e)\; Br$
Calculate the $pH$ on mixing $100\, mL$ of $0.2\,M\, HCN$ with $400\, mL$ of $0.05\, M\, KOH$ at $25\,^oC$ ($pK_b$ for $CN^-= 8$)
→In extraction of $Al$ chemical used in serpeck's process is
→How many carbon atoms in the molecule $HCOO - {(CHOH)_2} - COOH$ are asymmetric
→$B$ is
→In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
Arrange the following amines in the order of increasing basicity.
The enthalpy changes at $298\, K$ in successive breaking of $O -H$ bonds of $HOH$ are-
$H_2O (g) \to H(g) + OH (g), \Delta H = 498\, kJ \,mol^{-1}$
$OH (g) \to H(g) + O (g), \Delta H = 428\, kJ\, mol^{-1}$
The bond enthalpy of the $O-H$ bond is.....$kJ\, mol^{-1}$
→$H_2O (g) \to H(g) + OH (g), \Delta H = 498\, kJ \,mol^{-1}$
$OH (g) \to H(g) + O (g), \Delta H = 428\, kJ\, mol^{-1}$
The bond enthalpy of the $O-H$ bond is.....$kJ\, mol^{-1}$
First ionization energy is the lowest with