List of top Chemistry Questions asked in JEE Advanced

Which of the following combination will produce $H_2$ gas?

Pure water freezes at $273 \,K$ and $1$ bar. The addition of $34.5\, g$ of ethanol to $500\, g$ of water changes the freezing point of the solution. Use the freezing point depression constant of water as $2\,K\, kg\,mol^{-1}$. The figures shown below represent plots of vapour pressure (V.P.) versus temperature (T). [molecular weight of ethanol is $46\, g\,mol^{-1}$] Among the following, the option representing change in the freezing point is

In a bimolecular reaction, the steric factor $P$ was experimentally determined to be $4.5.$ The correct option(s) among the following is(are)

The correct statement(s) for the following addition reactions is(are)

Addition of excess aqueous ammonia to a pink coloured aqueous solution of $MCl _{2} \cdot 6 H _{2} O (X)$ and $NH _{4} Cl$ gives an octahedral complex $Y$ in the presence of air. In aqueous solution, complex $Y$ behaves as $1: 3$ electrolyte. The reaction of $X$ with excess $HCl$ at room temperature results in the formation of a blue colured complex $Z$. The calculated spin only magnetic moment of $X$ and $Z$ is $3.87\, B.M$., whereas it is zero for complex $Y$. Among the following options, which statement(s) is(are) correct ?

The correct statement(s) about the oxoacids, $HClO_4$ and $HClO$, is(are)

The %yield of ammonia as a function of time in the reaction $N_{2}\left(g\right) + 3H_{2}\left(g\right) {\rightleftharpoons} 2NH_{3}\left(g\right), ?H < 0$ at $\left(P, T_{1}\right)$ is given below. If this reaction is conducted at $\left(P, T_{2}\right)$, with $T_{2} > T_{1}$, the %yield of ammonia as a function of time isrepresented by -

Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is (are) :

$Fe^{3+}$ is reduced to $Fe^{2+}$ by using -

The correct statement(s) about $Cr^{2+}$ and $Mn^{3+}$ is (are) - [Atomic numbers of $Cr = 24$ and $Mn = 25$]

Hydrogen peroxide in its reaction with $ KIO_4 $ and $ NH_2OH $ respectively, is acting as a

For the elementary reaction, $M\rightarrow N$, the rate of disappearance of $M$ increases by a factor of $8$ upon doubling the concentration of $M$. The order of the reaction with respect to $M$ is

In a galvanic cell, the salt bridge

The radiation corresponding to $3\rightarrow2$ transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of $3\times10^{-4}$T. If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to

In the reaction shown below, the major product(s) formed is/are

The product formed in the reaction of $SOCl_2$ with white phosphorus is

The correct combination of names for isomeric alcohols with molecular formula $C_4H_{10}O $ is/are

The acidic hydrolysis of ether $(X)$ shown below is fastest when

Assuming $2s-2p$ mixing is not operative, the paramagnetic species among the following is

Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure. The correct order of their boiling point is

Upon heating with $Cu_2S.$ the reagent(s) that give copper metal is/are

For the reaction: $I ^{-}+ ClO _{3}^{-}+ H _{2} SO _{4} \longrightarrow Cl ^{-}+ HSO _{4}^{-}+ I _{2}$ The correct statement(s) in the balanced equation is/are:

The correct statement(s) about $O_3$ is/are

Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are)

The $ K_{sp} \, of \, Ag_2CrO_4 $ is $ 1.1 \times 10^{ - 12 } $ at 298 K. The solubility (in mol/L) of $Ag_2 CrO_4 $ in $ a 0.1 M \, AgNO_3 $ solution is