List of top Chemistry Questions asked in JEE Main

$10\, mL$ of $2(M)$ $NaOH$ solution is added to $200\, mL$ of $0.5 (M)$ of $NaOH$ solution. What is the final concentration ?

The reaction of phenol with benzoyl chloride to give phenyl benzoate is known as :

The order of reactivity of the given haloalkanes towards nucleophile is :

Which of the following represents the correct order of increasing first ionisation enthalpy for $Ca, Ba, S, Se$ and $Ar$?

Solid $Ba(NO_3)_2$ is gradually dissolved in a $1.0 \times 10^{-4}$ M $Na_2CO_3$ solution. At which concentration of $Ba^{2+}$, precipitate of $BaCO_3$ begins to form ? ($K_{sp}$ for $BaCO_3 = 5.1 \times 10^{-9}$)

The correct order of viscosity of the following liquids will be:

Which one of the following molecules is expected to exhibit diamagnetic behaviour?

Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest $E_{m{^{3+}}/m{^{2+}}}^{\circ}$value?

Which one has the highest boiling point?

The order of increasing sizes of atomic radii among the elements $O, S, Se$ and $As$ is :

The catenation tendency of $C, Si$ and $Ge$ is in the order Ge $

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 ?

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

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

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 ?