MCQ
Delocalised molecular orbitals are found in
  • $H_2$
  • B
    $HS^-$
  • C
    $CH_4$
  • D
    $CO_3^{-2}$

Answer

Correct option: A.
$H_2$
a
All other species have simple sigma bonds but due to presence of $pi$ bond, $CO _3^{-2}$ have delocalised orbitals

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

Identify the compound which rotate the plane polarised light
If on a strand of $DNA$ the base sequence is $ATTGACGCAT$ then the sequence transcription on $RNA$ would be
A sample of $0.125\,g$ of an organic compound when analysed by Duma's method yields $22.78\,mL$ of nitrogen gas collected over $KOH$ solution at $280\,K$ and $759\,mm\,Hg$. The percentage of nitrogen in the given organic compound is.(Nearest integer).

$(a)$ The vapour pressure of water at $280 K$ is $14.2$ $mm Hg$

$(b)$ $R =0.082 L$ atm $K ^{-1} mol ^{-1}$

On the treatment of the following compound with a strong acid, the most susceptible site for bond cleavage is
The sum of $IE_1$ and $IE_2$. $IE_3$ and $IE_4$ for elements $P$ and $Q$ are given below

$(IE_1 + IE_2)$ $(IE_3 + IE_4)$
$(P)$ $2.45\, KJ/mol$ $8.82\, KJ/mol$
$(Q)$ $2.85\, KJ/mol$ $6.11\, KJ/mol$

then according to given information the incorrect statements is/are

$1.22\, \mathrm{~g}$ of an organic acid is separately dissolved in $100 \,\mathrm{~g}$ of benzene $\left(\mathrm{K}_{\mathrm{b}}=2.6\, \mathrm{~K}\, \mathrm{~kg} \,\mathrm{~mol}^{-1}\right)$ and $100\, \mathrm{~g}$ of acetone $\left(\mathrm{K}_{b}=1.7\, \mathrm{~K} \,\mathrm{~kg} \,\mathrm{~mol}^{-1}\right) .$ The acid is known to dimerize in benzene but remain as a monomer in acetone. The boiling point of the solution in acetone increases by $0.17^{\circ} \mathrm{C}$.

The increase in boiling point of solution in benzene in ${ }^{\circ} \mathrm{C}$ is $\mathrm{x} \times 10^{-2}$. The value of $\mathrm{x}$ is ..... .(Nearest integer)

$[$ Atomic mass : $\mathrm{C}=12.0, \mathrm{H}=1.0, \mathrm{O}=16.0]$

Formula of ferrocene is :
Consider the following sequence of reaction

$C_2H_5-Br\overset{AgCN}{\rightarrow}A\overset{H_2/Ni}{\rightarrow}B$  

Product $B$ is

In which of the following reaction alcohol is formed as major product
Azimuthal quantum number defines