List of top Chemistry Questions asked in JEE Main

The incorrect statement is :

The increasing order of pK_b values of the following compounds is :

(I) 4-methoxy-N,N-dimethylaniline, (II) N,N-dimethylaniline, (III) N-methylaniline with CN at the meta position, (IV) N-methylaniline with OH at the meta position.

A solution of two components containing n₁ moles of the 1^st component and n₂ moles of the 2^nd component is prepared. M₁ and M₂ are the molecular weights of component 1 and 2 respectively. If d is the density of the solution in g mL^-1, C₂ is the molarity and x₂ is the mole fraction of the 2^nd component, then C₂ can be expressed as :

Which of the following compounds shows geometrical isomerism?

Arrange the following solutions in the decreasing order of pOH :

(A) 0.01 M HCl
(B) 0.01 M NaOH
(C) 0.01 M CH₃COONa
(D) 0.01 M NaCl

For the reaction

Fe₂N(s) + \(\frac{3}{2}\)H₂(g) \(\rightleftharpoons\) 2Fe(s) + NH₃(g)

The species that has a spin-only magnetic moment of 5.9 BM, is :
(T_d = tetrahedral)

The set that contains atomic numbers of only transition elements, is :

The variation of equilibrium constant with temperature is given below :

Temperature	Equilibrium Constant
T1 = 25\(^\circ\)C	K1 = 10
T2 = 100\(^\circ\)C	K2 = 100

The values of \(\Delta H^\circ\), \(\Delta G^\circ\) at T₁ and \(\Delta G^\circ\) at T₂ (in kJ mol^-1) respectively, are close to :
[Use R = 8.314 J K^-1 mol^-1]

Consider the following reactions
A \(\rightarrow\) P₁ ; B \(\rightarrow\) P₂ ; C \(\rightarrow\) P₃ ; D \(\rightarrow\) P₄,
The order of the above reactions are a, b, c, and d, respectively. The following graph is obtained when log[rate] vs. log[conc.] are plotted

Among the following, the correct sequence for the order of the reactions is :

Consider the following reactions

'A' is :

The lanthanoid that does NOT show +4 oxidation state is :

The correct statement with respect to dinitrogen is :

The major products of the following reaction are :

The major product of the following reaction is :

The major product obtained from the following reaction is :

For a dimerization reaction,
\(\mathrm{2A(g) \to A_2(g)}\)
at 298 K, \(\Delta U^\circ = -20\ \mathrm{kJ\ mol^{-1}}\), \(\Delta S^\circ = -30\ \mathrm{J\,K^{-1}\,mol^{-1}}\),
then the \(\Delta G^\circ\) will be _____ J.

The volume, in mL, of 0.02 M \(\mathrm{K_2Cr_2O_7}\) solution required to react with 0.288 g of ferrous oxalate in acidic medium is _______.
(Molar mass of Fe = 56 g mol^-1)

For a reaction \(\mathrm{X + Y \rightleftharpoons 2Z}\), 1.0 mol of X, 1.5 mol of Y and 0.5 mol of Z were taken in a 1 L vessel and allowed to react. At equilibrium, the concentration of Z was 1.0 mol L^-1. The equilibrium constant of reaction is \(\frac{x}{15}\). The value of x is _________.

Considering that \(\Delta_0 \gt P\), the magnetic moment (in BM) of \(\mathrm{[Ru(H_2O)_6]^{2+}}\) would be _________.

Hydrogen peroxide, in the pure state, is :

Which one of the following polymers is not obtained by condensation polymerisation?

The one that is NOT suitable for the removal of permanent hardness of water is :

Adsorption of a gas follows Freundlich adsorption isotherm. If x is the mass of the gas adsorbed on mass m of the adsorbent, the correct plot of \(\frac{x}{m}\) versus p is :

The following molecule acts as an :