List of top Chemistry Questions asked in JEE Main

Which of the following arrangements does not represent the correct order of the property stated against it?

Which of the following is diamagnetic?

The density of $3M$ solution of sodium chloride is $1.252\, g\, mL^{-1}$. The molality of the solution will be: (molar mass, $NaCl = 585\, g\, mol^{-1}$)

In Goldschmidt aluminothermic process which of the following reducing agents is used:

The rate constant of a zero order reaction is $2.0 \times 10^{-2}\, mol \,L^{-1}\, s^{-1}$. If the concentration of the reactant after $25$ seconds is $0.5\,M$. What is the initial concentration ?

Copper crystallises in fcc with a unit length of $361\,pm$. What is the radius of copper atom ?

In which of the following pairs of molecules/ions both the species are not likely to exist?

In a face centred cubic lattice, atoms of $A$ form the comer points and atoms of $B$ form the face centred points. If two atoms of $A$ are missing from the comer points, the formula of the ionic compound is :

The first ionisation potential of $Na$ is $5.1\, eV$. The value of electron gain enthalpy of $Na^+$ will be

Electron gain enthalpy with negative sign of fluorine is less than that of chlorine due to :

A solution of copper sulphate $\left(CuSO_{4}\right)$ is electrolysed for 10 minutes with a current of $1.5$ amperes. The mass of copper deposited at the cathode (at. mass of $Cu = 63u$) is :

Which of the following is the wrong statement?

Vapour pressure of pure benzene is $119$ torr and that of toluene is $37.0$ torr at the same temperature. Mole fraction of toluene in vapour phase which is in equilibrium with a solution of benzene and toluene having a mole fraction of toluene $0.50$, will be :

Which has trigonal bipyramidal shape ?

An artificial radioactive isotope gave ${^{14}_{7}N}$ after two successive $\beta$ -particle emissions. The number of neutrons in the parent nucleus must be :

Find out the major products from the following reactions

What happens when methane undergoes combustion in systems A and B respectively?

If a gas absorbs $200J$ of heat and expands by $500$ cm${}^3$ against a constant pressure of $2\times {10}^{5}N{m}^{-2},$ then the change in internal energy is:

The correct order of increasing $C-O$ bond length of $CO, C{O}_3^{2-}, C{O}_2$ is:

The number of bridging \(CO\) ligands and \(Co-Co\) bonds in \(Co_2(CO)_8\), respectively are:

In the metal carbonyls of the general formula M(CO)x where M = metal x = 4, EAN rule is satisfied for atomic number of M equal to:

Which of the following is a set of essential amino acids?

Which of the following compound is optically active?

Among the following four aromatic compounds, which one will have the lowest melting point?