MCQ
The enolic form of acetone contains
  • $9$ sigma bonds, $1$ pi bond and $2$ lone pairs
  • B
    $8$ sigma bonds, $  2$ pi bonds and $2$ lone pairs
  • C
    $10$ sigma bonds, $1$ pi bond and $1$ lone pair
  • D
    $9$ sigma bonds, $2$pi bonds and $1$ lone pair

Answer

Correct option: A.
$9$ sigma bonds, $1$ pi bond and $2$ lone pairs
(a) .$\,C{H_3} - \mathop {C = \,C{H_2}\,}\limits^{\mathop {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\limits^{_ \bullet ^ \bullet \mathop O\limits^{ \bullet \;\; \bullet } - H\,\,\,\,\,\,\,} } $

has $9$$\sigma$, $1$ and $2$ lone pairs.

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

The value of Rydberg constant $\left(R_H\right)$ is $2.18 \times 10^{-18} \mathrm{~J}$. The velocity of electron having mass $9.1 \times 10^{-31} \mathrm{~kg}$ in Bohr's first orbit of hydrogen atom $=\ldots \ldots \ldots \times 10^5 \mathrm{~ms}^{-1}$ (nearest integer)
Given below are two statements :
Statement (I) : Kjeldahl method is applicable to estimate nitrogen in pyridine.
Statement (II) : The nitrogen present in pyridine can easily be converted into ammonium sulphate in Kjeldahl method.
In the light of the above statements, choose the correct answer from the options given below.
The required charge for one equivalent weight of silver deposite on cathode is
Which of the following compound can show cis-trans isomerism ?
The arenium ion which is not involved in the bromination of Aniline is .
In solid argon, the atoms are held together by
A $1.84\,mg$ sample of polyhydric alcoholic compound ' $X$ ' of molar mass $92.0\,g / mol$ gave $1.344\,mL$ of $H _{2}$ gas at $STP$. The number of alcoholic hydrogens present in compound ' $X$ ' is $.....$
Relation between $(B)$ and $(C)$ is

$C{H_3} - C \equiv C - H\xrightarrow{{NaN{H_2}}}\xrightarrow{{C{H_3} - I}}(A)\xrightarrow{{Li/liq\,N{H_2}}}(B)$

$C{H_3} - C \equiv C - H\xrightarrow{{NaN{H_2}}}\xrightarrow{{C{H_3} - I}}(A)\xrightarrow[{Pd.CaC{O_3}}]{{{H_2}}}(C)$

For water $\Delta_{\text {vap }} \mathrm{H}=41 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at $373 \mathrm{~K}$ and 1 bar pressure. Assuming that water vapour is an ideal gas that occupies a much larger volume than liquid water, the internal energy change during evaporation of water is $...... \mathrm{kJ}\, \mathrm{mol}^{-1}$

[Use: $\left.\mathrm{R}=8.3 \,\mathrm{~J} \,\mathrm{~mol}^{-1}\, \mathrm{~K}^{-1}\right]$

Observe structures of the following compounds

$[Image]$

The total number of structures/compounds which possess asymmetric carbon atoms is $....$