List of top Chemistry Questions asked in JEE Main

The following molecule acts as an :

The final major product of the following reaction is :

(3-methylaniline treated with (i) \(\mathrm{Ac_2O}\)/Pyridine, (ii) \(\mathrm{Br_2/FeCl_3}\), (iii) \(\mathrm{OH^{-}/\Delta}\))

Boron and silicon of very high purity can be obtained through :

The major product of the following reaction is :

The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure.

The electrolyte X is :

Among the following compounds, geometrical isomerism is exhibited by :

The compound that has the largest H-M-H bond angle (M = N, O, S, C) is :

The rate constant (k) of a reaction is measured at differenct temperatures (T), and the data are plotted in the given figure. The activation energy of the reaction in \(\mathrm{kJ\ mol^{-1}}\) is :
(R is gas constant)

The increasing order of boiling points of the following compounds is :

(I: 4-methylphenol, II: 4-nitrophenol, III: 4-aminophenol, IV: 4-methoxyphenol)

The correct order of the ionic radii of
\(\mathrm{O^{2-}}\), \(\mathrm{N^{3-}}\), \(\mathrm{F^{-}}\), \(\mathrm{Mg^{2+}}\), \(\mathrm{Na^{+}}\) and \(\mathrm{Al^{3+}}\) is :

Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ mol^\(-1\), and 4 kJ mol^\(-1\), respectively.
The hydration enthalpy of NaCl is :

Consider the complex ions,
trans-\(\mathrm{[Co(en)_2Cl_2]^{+}}\) (A) and
cis-\(\mathrm{[Co(en)_2Cl_2]^{+}}\) (B).
The correct statement regarding them is :

The correct statement about probability density (except at infinite distance from nucleus) is :

The number of chiral carbon(s) present in peptide, Ile-Arg-Pro, is _____.

A soft drink was bottled with a partial pressure of \(\mathrm{CO_2}\) of 3 bar over the liquid at room temperature. The partial pressure of \(\mathrm{CO_2}\) over the solution approaches a value of 30 bar when 44 g of \(\mathrm{CO_2}\) is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is ______ \(\times\) \(10^{-1}\).
(First dissociation constant of \(\mathrm{H_2CO_3}\) = \(4.0\times 10^{-7}\); \(\log 2 = 0.3\); density of the soft drink = 1 g \(\mathrm{mL^{-1}}\)) .

The total number of coordination sites in ethylenediaminetetraacetate (\(\mathrm{EDTA^{4-}}\)) is _____.

The condition that indicates a polluted environment is :

The equation that represents the water-gas shift reaction is :

An Ellingham diagram provides information about :

An oxidation-reduction reaction in which 3 electrons are transferred has a \(\Delta G^\circ\) of 17.37 kJ \(\mathrm{mol^{-1}}\) at 25 \(^\circ\)C. The value of \(E^\circ_{\mathrm{cell}}\) (in V) is ______ \(\times\) \(10^{-2}\).
(1 F = 96,500 C \(\mathrm{mol^{-1}}\))

Identify the correct molecular picture showing that happens at the critical micellar concentration (CMC) of an aqueous solution of a surfactant (polar head: shaded circle; non-polar tail: wavy line; water: black dot).

The minimum number of moles of \(\mathrm{O_2}\) required for complete combustion of 1 mole of propane and 2 moles of butane is _____.

In the sixth period, the orbitals that are filled are :

In the following reaction sequence the major products A and B are :

If a person is suffering from the deficiency of nor-adrenaline, what kind of drug can be suggested?