List of top Chemistry Questions asked in JEE Main

The products A and B formed in the following reaction scheme are respectively

IUPAC name of following compound is

The correct increasing order for bond angles among $ \text{BF}_3, \, \text{PF}_3, \, \text{and} \, \text{CF}_3 $ is:

Product A and B formed in the following set of reactions are:

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: H₂Te is more acidic than H₂S.

Reason R: Bond dissociation enthalpy of H₂Te is lower than H₂S.

In light of the above statements, choose the most appropriate from the options given below:

The correct stability order of the following resonance structures of $ \text{CH}_3 - \text{CH} = \text{CH} - \text{CHO} $ is:

m–chlorobenzaldehyde on treatment with 50$\%$ KOH solution yields

Statement I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow $S_N2$ mechanism.

Statement II: A secondary alkyl halide when treated with a large excess of ethanol follows $S_N1$ mechanism.

In the light of the above statements, choose the most appropriate from the questions given below:

Salicylaldehyde is synthesized from phenol, when reacted with

Which among the following purification methods is based on the principle of “Solubility” in two different solvents?

Consider the following test for a group-IV cation. \[ \text{M}^{2+} + \text{H}_2\text{S} \rightarrow \text{A (Black precipitate)} + \text{byproduct} \] \[ \text{A + aqua regia} \rightarrow \text{B + NOCl + S + H}_2\text{O} \] \[ \text{B + KNO}_2 + \text{CH}_3\text{COOH} \rightarrow \text{C + byproduct} \] The spin-only magnetic moment value of the metal complex $ \text{C} $ is $ \dots \dots \dots $ BM. (Nearest integer)

The number of oxygen atoms present in chemical formula of fuming sulphuric acid is _______.

Number of compounds from the following which cannot undergo Friedel-Crafts reactions is :____
toluene, nitrobenzene, xylene, cumene, aniline, chlorobenzene, m-nitroaniline, m-dinitrobenzene

Total number of electrons present in $ (\pi^*) $ molecular orbitals of $ \text{O}_2 $, $ \text{O}_2^+ $, and $ \text{O}_2^- $ is __________ .

Match List I with List II

Choose the correct answer from the options given below :

$\text{The number of non-polar molecules from the following is \_\_\_\_\_\_.} \\ \text{HF, H}_2\text{O, SO}_2, \, \text{H}_2, \, \text{CO}_2, \, \text{CH}_4, \, \text{NH}_3, \, \text{HCl, CHCl}_3, \, \text{BF}_3$

Which structure of protein remains intact after coagulation of egg white on boiling?

Identify the following species in which $d^2sp^3$ hybridization is shown by the central atom.

Which among the following halide/s will not show S$_N$1 reaction:

Choose the most appropriate answer from the options given below:

The order of relative stability of the contributing structure is:

Choose the correct answer from the options given below:

Which of the following statements is not correct about rusting of iron?

Choose the correct option having all the elements with $ d^{10} $ electronic configuration from the following:

Phenolic group can be identified by a positive

The technique used for purification of steam volatile water immiscible substance is:

Match List-I with List-II.

Choose the correct answer from the options given below: