List of top Chemistry Questions asked in JEE Advanced

Dissolving $1.24 \,g$ of white phosphorous in boiling $NaOH$ solution in an inert atmosphere gives a gas $Q$ The amount of $CuSO _4$ (in g) required to completely consume the gas $Q$ is ___ [Given : Atomic mass of $H =1, O =16, Na =23, P =31, S =32, Cu =63$ ]

The reduction potential \(\left(E^0, in\ V\right)\) of \(MnO _4^{-}( aq ) / Mn ( s )\) is\(\left[ Given : E_{\left( MnO _4^-( aq ) / MnO _2( s )\right)}^0=1.68 V ; E_{\left( MnO _2( s )/ Mn ^{2+}( aq )\right)}^0=1.21 V ; E_{\left( Mn ^2( aq ) / Mn ( s )\right)}^0=-1.03 V \right]\)

The correct option(s) related to adsorption processes is(are)

Considering the following reaction sequence, the correct statement(s) is(are)

The compound(s) which react(s) with $NH _3$ to give boron nitride (BN) is(are)

The treatment of an aqueous solution of $374\, g$ of $Cu \left( NO _3\right)_2$ with excess $KI $ results in a brown solution along with the formation of a precipitate Passing $H _2 S$ through this brown solution gives another precipitate $X$ The amount of $X$ (in $g$ ) is ___ [Given : Atomic mass of $H =1, N =14, O =16, S =32, K =39, Cu =63, I =127$ ]

The electrochemical extraction of aluminum from bauxite ore involves

The treatment of galena with $HNO _3$ produces a gas that is

Treatment of D-glucose with aqueous $NaOH$ results in a mixture of monosaccharides, which are

The reaction $Pb \left( NO _3\right)_2$ and $NaCl$ in water produces a precipitate that dissolves upon the addition of $HCl$ of appropriate concentration. The dissolution of the precipitate is due to the formation of

The major product formed in the following reaction is

For the reaction, $X (s) \rightleftharpoons Y (s)+ Z (g)$, the plot of $\ln \frac{p_{ Z }}{p^{0}}$ versus $\frac{10^{4}}{T}$ is given below (in solid line), where $p_{ z }$ is the pressure (in bar) of the gas $Z$ at temperature $T$ and $p^0=1$ bar 

(Given, $\frac{ d (\ln K)}{ d \left(\frac{1}{T}\right)}=-\frac{\Delta H^{0}}{R}$, where the equilibrium constant, $K=\frac{p_{z}}{p^{0}}$ and the gas constant, $R=8.314 \,J \,K ^{-1} mol ^{-1}$ ) 
The value of $\Delta S^{0}$ (in $J\, K ^{-1} mol ^{-1}$ ) for the given reaction, at $1000\, K$ is ______

Correct option(s) for the following sequence of reactions is(are)

An ideal gas undergoes a reversible isothermal expansion from the state I to state II followed by a reversible adiabatic expansion from state II to state III. The correct plot(s) representing the changes from the state I to state III is(are) 
(p: pressure, V: volume, T: temperature, H: enthalpy, S: entropy)

The calculated spin only magnetic moments of $\left[ Cr \left( NH _{3}\right)_{6}\right]^{3+}$ and $\left[ CuF _{6}\right]^{3-}$ in BM, respectively, are
(Atomic number of $Cr$ and $Cu$ are $24$ and $29$ , respectively)

Consider a helium (He) atom that absorbs a photon of wavelength 330 nm. The change in the velocity (in cm s^-1) of the He atom after the photon absorption is_____.
(Assume: Momentum is conserved when the photon is absorbed.
Use: Planck constant = 6.6 × 10^-34 J s, Avogadro number = 6 × 1023 mol^-1, Molar mass of He = 4 g mol^-1)

Given:

The compound(s), which on reaction with HNO₃ will give the product having a degree of rotation, [α]D = –52.7º is(are);

The correct statement(s) related to the metal extraction processes is(are)

The total number of possible isomers for \([ \text{Pt(NH}_3\text{)}_4\text{Cl}_2 ]\text{Br}_2\) is ___.

For the following reaction scheme, percentage yields are given along the arrow: 

$X\, g$ and $y \,g$ are mass of $R$ and $U$, respectively (Use : Molar mass (in $g \,mol^{-1})$ of $H, C$ and $O$ as $1, 12$ and $16$, respectively) The value of $x$ is ______

Ozonolysis of \(ClO_2\) produces oxide of chlorine. The average oxidation state of chlorine in this oxide is ____.

The reaction sequence(s) that would lead to o-xylene as the major product is(are).

The reaction of Q with PhSNa yields an organic compound (major product) that gives a positive Carius test on treatment with Na₂O₂ followed by the addition of BaCl₂. The correct option(s) for Q is(are).

The correct statement(s) related to colloids is(are)