List of top Questions asked in JEE Main

Match the following (List–I with List–II) and choose the correct option.

Which of the following is the correct order of reactivity of the given nucleophiles when treated with \( \text{CH}_3\text{Br} \) in methanol? \[ \text{F}^-,\ \text{I}^-,\ \text{C}_2\text{H}_5\text{O}^-,\ \text{C}_6\text{H}_5\text{O}^- \]

The reactivity of the following compounds on the basis of the \( \mathrm{S_N1} \) mechanism is

(I), (II), (III), (IV) as shown in the figure.

Which of the following is the correct order of nucleophilic nature for the following reaction? \[ \text{CH}_3\text{Br} + \text{Nu}^- \longrightarrow \text{CH}_3\text{Nu} + \text{Br}^- \]

The following compounds undergo SN2 reaction. What is the correct order of SN2 reactivity?

Consider the following reaction: \[ \mathrm{Ph{-}CH_2NH_2 \xrightarrow[\text{Py}]{PhCOCl} X \xrightarrow[]{LiAlH_4} Y} \] The correct structure of \(Y\) is:

Consider the following reaction: \[ \mathrm{CH_3{-}C{\equiv}C{-}CH_3} \] \[ \xrightarrow[\text{Pd/C}]{H_2} X \qquad \xrightarrow[\text{liq. }NH_3]{Na} Y \] Choose the correct option.

Order of reactivity of nucleophiles given below, \( \text{OH}^- \), \( \text{CH}_3\text{COO}^- \), \( \text{PhO}^- \), \( \text{ClO}_4^- \)

Observe the following reaction sequence:

The final product \( E \) is:

Which compound is optically inactive out of the following? n-propyl chloride, secondary butyl chloride, tert-butyl chloride, isopropyl chloride.

Match the two columns:

Choose the correct answer:

Match the following and choose the correct option.

Which of the following is the correct order of the reactivity of given nucleophiles when treated with \( \text{CH}_3\text{Br} \) in methanol? \( \text{F}^- \), \( \text{I}^- \), \( \text{C}_2\text{H}_5\text{O}^- \), \( \text{C}_6\text{H}_5\text{O}^- \)

Reactivity of the following on the basis of \( S_\text{N}1 \) mechanism.

A compound ‘A’ with molecular formula \( \text{C}_9\text{H}_{11}\text{NO} \) reacts with \( \text{Br}_2/\text{NaOH} \) to give \( (X) \). On reaction with \( \text{NaNO}_2 \) in dilute HCl, it gives compound \( (Y) \). When \( (Y) \) is treated with CuCN, followed by hydrolysis, it gives \( (Z) \). The compound \( (A) \) on hydrolysis also gives compound \( (Z) \). Identify compound \( (A) \).

Consider the following sequence of reactions and identify \( A \), \( B \), and \( C \) respectively.

In the following reaction sequence, identify compound \( (R) \).

Consider the following reaction:

In Sulphur estimation, 0.7 g of an organic compound gives 1 g of BaSO₄ by Carius method. What is the % of ‘S’ in the compound?

80 mL of an organic compound is mixed with 264 mL of O₂ and ignited. It gives 224 mL of gaseous mixture at NTP. After passing through KOH, 64 mL of gas remains. The organic compound is:

Which of the following resonating structure is the most stable?

Observe the following reaction sequence:
\[ \text{C}_4\text{H}_8 \xrightarrow{\text{HCl}} \text{C}_4\text{H}_7\text{Cl} \xrightarrow{\text{NH}_3} \text{C}_4\text{H}_9\text{NH}_2 \xrightarrow{\text{NaNO}_2 + \text{HCl}} \text{C}_4\text{H}_9\text{OH} \] Which of the following is the correct structure for A, B, and C?

Given the reaction sequence:

The percentage of Nitrogen in compound E is: