General Organic Chemistry - Organic Chemistry - Chemistry Previous Year Questions

+I-effect is shown by

Arrange stability of the given carbon cation in decreasing order

Select the strongest base from the given compounds:

[A] p- \(\mathrm{NO}_2-\mathrm{C}_6 \mathrm{H}_4 \mathrm{NH}_2\)

[B] \(\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2-\mathrm{NH}_2\)

[C] \(\mathrm{m}-\mathrm{NO}_2-\mathrm{C}_6 \mathrm{H}_4 \mathrm{NH}_2\)

[D] \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2\)

Which one of the following statements is correct?

Which of the following carbanions is the least stable?

Which of the following is not aromatic?

Identify the compound which is non-aromatic in nature.

From the following compounds, identify the one which is most acidic.

Given below are 4 species with one odd electron on the Carbon atom.

$$\begin{array}{ll} \[\mathrm{A}=\left(\mathrm{CH}_3\right)_3 \stackrel{\bullet}{\mathrm{C}} & \mathrm{B}=\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \stackrel{\bullet}{\mathrm{C}} \\\] \[\mathrm{C}=\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \stackrel{\bullet}{\mathrm{C}} \mathrm{H} & \mathrm{D}=\left(\mathrm{CH}_3\right)_2 \stackrel{\bullet}{\mathrm{C}} \mathrm{H}\] \end{array}$$

Choose the correct decreasing order of stability of the species.

Arrange the following compounds in the decreasing order of reactivity towards \(\mathrm{S}_{\mathrm{N}} 1\) reaction.

Two statements, one Assertion and the other Reason are given. Choose the correct option.

Assertion: Heterocyclic compounds like Pyridine and Thiophene are non-aromatic compounds.

Reason: According to Huckel rule for a given compound to exhibit aromaticity, the molecule must be planar, cyclic system having delocalised $(4 n+2) \pi$ electrons.

Rank the following compounds in order of increasing basicity.

Arrange the following free radicals in the increasing order of their stability:

A	B	C	D

Arrange the following in the decreasing order of their $\mathrm{pK}_{\mathrm{a}}$ values.