List of top Chemistry Questions asked in JEE Advanced

Among the following, the correct statement(s) about polymers is(are)
Atom X occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in %) of the resultant solid is closest to

The reaction of HClO3 with HCl gives a paramagnetic gas, which upon reaction with O3 produces

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
Treatment of D-glucose with aqueous NaOH results in a mixture of monosaccharides, which are
The reduction potential \(\left(E^0, in\ V\right)\) of \(MnO _4^{-}( aq ) / Mn ( s )\) is\(\left[ Given : E_{\left( MnO _4^-( aq ) / MnO _2( s )\right)}^0=1.68 V ; E_{\left( MnO _2( s )/ Mn ^{2+}( aq )\right)}^0=1.21 V ; E_{\left( Mn ^2( aq ) / Mn ( s )\right)}^0=-1.03 V \right]\)
For diatomic molecules, the correct statement(s) about the molecular orbitals formed by the overlap to two $2 p_z$ orbitals is(are)

If the reaction sequence given below is carried out with 15 moles of acetylene, the amount of the product D formed (in g) is _____.

Reaction

The yields of A, B, C and D are given in parentheses.
[Given: Atomic mass of H = 1, C = 12, O = 16, Cl = 35]

\(2\) \(mol\) of \(Hg(g)\) is combusted in a fixed volume bomb calorimeter with excess of \(O_2\) at 298K and 1 atm into \(HgO(s)\) During the reaction, temperature increases from \(2980\) \(K\) to \(3128\) \(K\). If heat capacity of the bomb calorimeter and enthalpy of formation of \(Hg(g)\) are \(2000\) \(kJ \;K^{-1}\) and \(6132\) \(kJ \;mol^{-1}\) at \(298\) \(K\), respectively, the calculated standard molar enthalpy of formation of \(HgO(s)\) at \(298\) \(K\) is \(X\) \(kJ \;mol^{-1}\) The value of | \(X\) | is [Given : Gas constant \(R\) =\(83\) \(J\) \(K^{-1}\) \(mol^{-1}\)] 

The reaction of HClO3 with HCl gives a paramagnetic gas, which upon reaction with O3 produces

The treatment of an aqueous solution of $3.74\, g$ 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 $H =1, N =14, O =16, S =32, K =39, Cu =63, I =127$ ]
A solution is prepared by mixing $0.01\, mol$ each of $H _2 CO _3, NaHCO _3, Na _2 CO _3$, and $NaOH$ in $100 \, mL$ of water $pH$ of the resulting solution is ___ [Given : $p K _{ a 1}$ and $p K _{ a 2}$ of $H _2 CO _3$ are $637$ and $1032$, respectively $; \log 2=030$ ]
The reaction of $HClO _3$ with $HCl$ gives a paramagnetic gas, which upon reaction with $O _3$ produces
The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range $900-1500 K$ is(are)
Atom X occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in %) of the resultant solid is closest to
2 mol of Hg(g) is combusted in a fixed volume bomb calorimeter with excess of O2 at 298 K and 1 atm into HgO(s). During the reaction, temperature increases from 298.0 K to 312.8 K. If heat capacity of the bomb calorimeter and enthalpy of formation of Hg(g) are 20.00 kJ K–1 and 61.32 kJ mol–1 at 298 K, respectively, the calculated standard molar enthalpy of formation of HgO(s) at 298 K is X kJ mol–1. The value of |X| is _______.
[Given: Gas constant R = 8.3 J K–1 mol–1]
Consider the following reaction 
Carius method
On estimation of bromine in $100 \,g$ of $R$ using Carius method, the amount of $AgBr$ formed (in $g$ ) is __ [Given : Atomic mass of $H =1, C =12, O =16, P =31, Br =80, Ag =108$ ]
The compound(s) which react(s) with $NH _3$ to give boron nitride (BN) is(are)
Considering the following reaction sequence, the correct statement(s) is(are)
Compound P and Q are carboxylic acids
The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range $900-1500 K$ is(are)
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 reaction of HClO3 with HCl gives a paramagnetic gas, which upon reaction with O3 produces

Consider the following reaction 
Carius method
On estimation of bromine in $100 \,g$ of $R$ using Carius method, the amount of $AgBr$ formed (in $g$ ) is __ [Given : Atomic mass of $H =1, C =12, O =16, P =31, Br =80, Ag =108$ ]
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\(\left[ Given : E_{\left( MnO _4^-( aq ) / MnO _2( s )\right)}^0=1.68 V ; E_{\left( MnO _2( s )/ Mn ^{2+}( aq )\right)}^0=1.21 V ; E_{\left( Mn ^2( aq ) / Mn ( s )\right)}^0=-1.03 V \right]\)