List of top Chemistry Questions asked in JEE Main

Given below are two statement one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A): CH2 = CH – CH2 – Cl is an example of allyl halide
Reason (R): Allyl halides are the compounds in which the halogen atom is attached to sp2 hybridised carbon atom.
In the light of the two above statements, choose the most appropriate answer from the options given below
On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation factor of the organic compound is \( \_\_\_\_ \times 10^{-1} \).
The compound formed by the reaction of ethanal with semicarbazide contains _____number of nitrogen atoms.
The total number of ‘Sigma’ and Pi bonds in 2 formylhex-4-enoic acid is ____.
The correct IUPAC name of K2MnO4 is
How many of the following compounds have \(sp^3\) hybridized central atoms?
\(H_2O, NH_3, SiO_2, SO_2, CO, CH_4\) and \(BF_3\)
Find out the final product C
Find out the final product C
We are given with three NaCl samples and their Van't Hoff factors. Which is correct option ?
SampleVan't Haff Factor 
Sample - 1 (0.1 M)\(i_1\)
Sample - 2 (0.01 M)\(i_2\)
Sample - 3 (0.001 M)\(i_2\)
Complementary stand of DNA ATGCTTCA is:
Which is following compound is easily attacked by electrophile?
Which of the following is correct for adiabatic free expansion against vacuum?
What will be the reactivity order of following compounds towards electrophilic substitution reaction ?
reactivity order of compounds towards electrophilic substitution reaction
In the following reactions, find the product A and B
In the following reactions, find the product A and B
Which of the following solutions shows positive deviation from Raoult's law?
Which of the following has allylic halogen?
The major product formed in the following reaction is-
The major product formed in the following reaction is
Find the total number of sigma and pi bonds in 2-formyl hex-4-enoic acid.
On which factor, electrical conductivity of electrolytic cell does not depend
Decreasing order of electron gain enthalpy of the following elements (magnitude only)
Sulphur A, Bromine - B, Fluorine C, Argon D
Find the rate constant for first order gaseous reaction: 
\(A(g)-------> B(g) + C(g)\)
Which of the following options contain amphoteric oxide(s) only?
Species having carbon with sextet of valence electron and acts as an electrophile is:
Find product P of the following reaction-
Find product P
Energy difference between actual structure and its most stable resonating structure having least energy is called
What is the effect that occurs between lone pair and pi bond?