List of top Chemistry Questions asked in JEE Main

Find the total number of sigma and pi bonds in 2-formyl hex-4-enoic acid.

Decreasing order of electron gain enthalpy of the following elements (magnitude only)
Sulphur A, Bromine - B, Fluorine C, Argon D

On which factor, electrical conductivity of electrolytic cell does not depend

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:

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?

Which of The following coordination compounds has bridging carbonyl ligand?

Find product P of the following reaction-

Consider the following sequence of reactions:

Select the option with correct A & B respectively.

Which of the following is the correct structure for the given IUPAC name?
3-Methylpent-2-enal

How many of the following vitamins are stored in Human Body?
A, B, C, D, E, K?

Find out charge (in C) required for electrolysis of \(1\) mole of \(H_2O\) to produce \(O_2\) on one of the electrodes. \((F = 96500 \;C)\)

How many of the following compounds have zero dipole moment ?
\(NH_3, H_2O, HF, CO_2, SO_2, BF_3, CH_4\)

Calculate the Molarity of a Solution having density = \(1.5\) \(g/ml\). \(\%(w/w)\) of Solute is \(36\%\) and Molecular weight of Solute is \(36\) \(g/mol\)

Which of the following sets of elements can be detected by Lassaigne's Test ?

In Kjeldahl's method for estimation of nitrogen, \(CuSO_4\) acts as

A container contains 1g H₂ gas and 1g O₂ gas. What is the ratio of partial pressure of H₂ and O₂ (PH₂/PO₂)?

Alkaline KMnO4 Oxidised iodide to a particular product (A). Determine the oxidation state of iodine in the compound (A).

Half life of a first order reaction is \(36\;hr\). Find out time (in hour) required for concentration of reactant to get reduced by \(90\%\).

The ratio of magnitude of potential energy and kinetic energy for \(5^{th}\) excited state of hydrogen atom is

What is the group number of unununnium?

In case of isoelectronic species the size of \(F^-\), \(Na\) and \(Na^+\) is affected by:

Oxidation state of Fe(iron) in complex formed in brown ring test