List of top Chemistry Questions asked in JEE Main

In the following compounds, the decreasing order of basic strength will be :

Coupling of benzene diazonium chloride with 1 - naphthol in alkaline medium will give :

For the reaction \(2\mathrm{A} + \mathrm{B} \to \mathrm{C}\), the values of initial rate at diffrent reactant concentrations are given in the table below. The rate law for the reaction is :

[A] (mol L-1)	[B] (mol L-1)	Initial Rate (mol L-1 s-1)
0.05	0.05	0.045
0.10	0.05	0.090
0.20	0.10	0.72

Given that
\(E^{\ominus}_{\mathrm{O_2/H_2O}} = 1.23\ \mathrm{V}\);
\(E^{\ominus}_{\mathrm{S_2O_8^{2-}/SO_4^{2-}}} = 2.05\ \mathrm{V}\)
\(E^{\ominus}_{\mathrm{Br_2/Br^-}} = 1.09\ \mathrm{V}\)
\(E^{\ominus}_{\mathrm{Au^{3+}/Au}} = 1.4\ \mathrm{V}\)
The strongest oxidizing agent is :

The major product of the following reaction is :

The following ligand is :

Which of the following amines can be prepared by Gabriel phthalimide reaction ?

An organic compound neither reacts with neutral ferric chloride solution nor with fehling solution. it however, reacts with Grignard reagent and gives positive iodoform test. The compound is :

The major product of the following reaction is :

If solublity product of \(\mathrm{Zr_3(PO_4)_4}\) is denoted by \(\mathrm{K_{sp}}\) and its molar solubility is denoted by S, then which of the following relation between S and \(\mathrm{K_{sp}}\) is correct ?

Maltose on treatment with dilute HCI gives :

The two monomers for the synthesis of Nylon 6, 6 are

Among the following the false statement is -

The compound that is NOT a common component of photochemical smog is :

The major product of the following reaction is –

(Reactant: an aryl acetate, \(\mathrm{CH_3COO}\)-C₆H₄-\(\mathrm{CH_2CH_2CH_2NH_2}\), with the two substituents meta to each other. Reagents: (i) \(\mathrm{NaNO_2/H^+}\); (ii) \(\mathrm{CrO_3/H^+}\); (iii) \(\mathrm{H_2SO_4}\) (conc.), \(\Delta\).)

The major product of the following reaction is –

(The reactant is a bicyclic compound (an octahydroindene: six-membered ring fused to a five-membered ring) carrying an isopropenyl group, \(\mathrm{C(CH_3)=CH_2}\), on the five-membered ring carbon that also bears an H; reagent: HCl.)

The major product of the following reaction is :
\(\mathrm{CH_3CH_2CH(Br)CH_2Br}\) (Br on the 2nd and 1st carbon; written as CH₃CH₂CH-CH₂ with Br below each of the last two carbons)
Reagents: (i) KOH alc; (ii) NaNH₂ in liq. NH₃

\(\Lambda_m^\circ\) for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S cm² mol⁻¹, respectively. If the conductivity of 0.001 M HA is 5 \(\times\) 10⁻⁵ S cm⁻¹, degree of dissociation of HA is -

The increasing order of the reactivity of the following with \(\mathrm{LiAlH_4}\) is

(A) \(\mathrm{C_2H_5CONH_2}\) (amide); (B) \(\mathrm{C_2H_5COOCH_3}\) (ester); (C) \(\mathrm{C_2H_5COCl}\) (acid chloride); (D) \(\mathrm{(C_2H_5CO)_2O}\) (anhydride)

The element that shows greater ability to form p\(\pi\)-p\(\pi\) multiple bonds, is :

The major product of the following reaction is –

(the optically active tertiary chloride \(\mathrm{CH_3-C(Cl)(CH_2CH_3)-COOCH_2CH_3}\) is heated with \(\mathrm{NaOEt}\))

For a reaction consider the plot of \(\ell n\,k\) versus \(1/T\) given in the figure. If the rate constant of this reaction at 400 K is \(10^{-5}\ \mathrm{s^{-1}}\), then the rate constant at 500 K is –

(The plot of \(\ell n\,k\) against \(1/T\) is a straight line with slope \(= -4606\ \mathrm{K}\).)

8 g of NaOH is dissolved in 18 g of \(\mathrm{H_2O}\). Mole fraction of NaOH in solution and molality (in mol kg\(^{-1}\)) of the solution respectively are -

If \(K_{sp}\) of \(\mathrm{Ag_2CO_3}\) is \(8\times10^{-12}\), the molar solubility of \(\mathrm{Ag_2CO_3}\) in 0.1 M \(\mathrm{AgNO_3}\) is -

The correct statement (s) among I to III with respect to potassium ions that are abundant within the cell fluid is /are
I. They activate many enzymes
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions they are responsible for the transmission of nerve signals