List of top Chemistry Questions asked in JEE Main

Maximum number of orbitals possible when n = 4 and m = 0?

What is the maximum amount of acetanilide formed when acetic anhydride in excess is treated with 18 gm of aniline. (nearest integer)

Arrange the following anions in the decreasing order of their stability.

What is the sum of number of ɑ and π bonds present in 2-oxo-hex-4-yne-oic acid ?

Which one of the following has the most negative (highest –ve) electron gain enthalpy?

Which of the following is used as adsorbent in adsorption chromatography?

Consider the following statements:
Statement I: The number of emitted photoelectrons Increases with increase in frequency of incident light.
Statement II: Kinetic energy of emitted photoelectrons increases with increase in frequency of incident light

Find out number of unpaired electrons in d-subshell for $[Co(H_2O)_6]^{ 3+}. $

IUPAC name of Catechol is-

Which of the following have a pyramidal shape ?

Among the following, species that have one unpaired electron:

Which of the following will not give Lassaigne's test?

Given below are two statements :
Statement-1: Aldol condensation is caused by acidity of a hydrogens.
Statement-2: Cross aldol is not possible between Ph-CHO and CH₃CHO
In the light of the above statements, choose the most appropriate answer from the options given below:

How many of the following compounds are sp³ hybridized

 \(\xrightarrow[Conc.HCL]{Zn-Hg}\) Product?

Which of the following is the correct order of first ionization enthalpy?

Among the following, decreasing order of basic strength will be:
OH^-, H^-, HCOO^-, CH₃COO^-, ^-OR
(I)     (II)    (III)         (IV)          (V)

For which of the following elements, only one oxidation state is possible?

If emf of hydrogen electrode at 25 ℃ is zero in pure water, then pressure of H₂ in bar is?

Which of the following has a maximum dipole moment?

Which of the following is the correct structure of L- Glucose

The conductivity of $0.02\mathrm{N}$ solution of a cell of $\mathrm{KCl}$ at ${25}^{\circ }\mathrm{C}$ is $2.765\times {10}^{-3}S{\mathrm{cm}}^{-1}$. If the resistance of a cell containing this solution is $4\times {10}^3$ ohm, what will be the cell constant?

The atomic masses of He and Ne are $4$ and $20$ a.m.u., respectively. The value of the de-Broglie wavelength of He gas at $-{73}^{\circ }C$ is "M" times that of the de-Broglie wavelength of $Ne$ at ${727}^{\circ }C.M$ is

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Experimental reaction of $CH _3 Cl$ with aniline and anhydrous $AlCl _3$ does not give $o$ and p-methylaniline.
Reason (R) : The $- NH _2$ group of aniline becomes deactivating because of salt formation with anhydrous $AlCl _3$ and hence yields $m$-methyl aniline as the product.
In the light of the above statements, choose the most appropriate answer from the options given below :