List of top Chemistry Questions asked in JEE Advanced

Rate of physical adsorption increases with

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite -

During depression of freezing point in a solution the following are in equilibrium

$H_3BO_3$ is

Which has maximum number of atoms?

In first order reaction, the concentration of reactant decreases from $800\, mol\, cm ^{-3}$ to $50\, mol\, cm ^{-3}$ in $2 \times 10^{4} s$. The rate constant is

Which of the following are isoelectronic and isostructural ? $NO_3^-$, $CO_3^{2-}$, $ClO_3^{-}$, $SO_3$

A solution which is $10^{ - 3 } $ M each in $ Mn^2, \, Fe^{ 2 + }, \, Zn^{ 2 + } $ and $ Hg^{ 2 + } $ is treated with $ 10^{ - 1 6 } M \, sulphide \, ion, $ If $ K_{ sp } $ of $MnS, FeS, ZnS$ and $ HgS $ are $ 10^{ - 15 }, \, 10^{ - 13 }, \, 10^{ - 20} \, and \, 10^{ - 34 } $ respectively, which one will precipitate first?

In the electrolytic cell, flow of electrons is from

An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon.The ester formed will be

In the process of extraction of gold, Roasted gold ore $+CN^-+H_2O\xrightarrow{O_2}[X]+HO$ $[X]+Zn\rightarrow[Y]+Au$ Identify the complexes [X] and [Y]

$[X] + H_2 SO_4 \longrightarrow [Y]$ a colourless gas with irritating smell $[Y] + K_2 Cr_2 O_7 + H_2 SO_4 \longrightarrow$ green solution $[X]$ and $ [Y]$ are

For $H_3PO_3\, and\, H_3PO_4,$ the correct choice is

Among the following, the molecule with the highest dipole moment is

$Me_2SiCl_2$ on hydrolysis will produce

Consider the chemical reaction, $N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$ .The rate of this reaction can be expressed in terms of time derivatives of concentration of $N_2(g), H_2(g) or NH_3(g)$. Identify the correct relationship amongst the rate expressions

How many moles of electron weighs 1 kg?

Which of the following molecular species has unpaired electron (s)?

Consider the following equilibrium in a closed container $ N_2 O_4 \, (g) \rightleftharpoons 2NO_2 \, ( g) $ At a fixed temperature, the volume of the reaction container is halved. For this change, which of the following statements hold true regarding the equilibrium constant $ ( K_p ) $ and degree of dissociation $( \alpha)$ ?

If the nitrogen atom had electronic configuration $1s^7$, it would have energy lower than that of the normal ground state configuration $1s^2 \, 2s^2 \, 2p^3 $ , because the electrons would be closer to the nucleus, yet $1s^7$ is not observed, because it violates

Identify the correct order of boiling points of the following compounds: $CH_3CH_2CH_2CH_2OH(1) \, \, \, \, \, \, \, CH_3CH_2CH_2CHO (2) $ $CH_3CH_2CH_2COOH (3) $

Polyphosphates are used as water softening agents because they

When the temperature is increased, surface tension of water

Identify the correct order of acidic strength of $CO_2, CuO, CaO, H_2O$

Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some half-cell reactions and their standard potentials are given below : $MnO^- _4(aq)+8H^+ (aq)+5e^- \longrightarrow Mn^{2+} (aq)+4H_2 O(l), E^\circ = 1.51\, V$ $Cr_2O^{2-} _7(aq)+14H^+ (aq)+6e^- \longrightarrow 2Cr^{3+} (aq)+7H_2 O(l), E^\circ = 1.38\, V$ $\hspace20mm Fe^{3+} (aq)+e^- \longrightarrow Fer^{2+} (aq) \, \, \, \, E^\circ=0.77\, V$ $\hspace20mm Cl_2 (g)+2e^- \longrightarrow 2Cl^{-} (aq) \, \, \, \, E^\circ=1.40\, V$ Identify the incorrect statement regarding the quantitative estimation of aqueous $Fe(NO_3)_2$