List of top Chemistry Questions asked in JEE Advanced

Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is

The cyanide ion $CN^-$ and $N_2$ are isoelectronic, but in contrast to $CN^-$ , $N_2$ is chemically inert because of

Among the following species, identify the isostructural pairs. $NF_3$, $NO_3^-$, $BF_3$, $H_3O^+$, $N_3H$

Arrange the following compounds in order of increasing dipole moment, toluene (I), m-dichlorobenzene (II), o-dichlorobenzene (III),p-dichlorobenzene (IV)

The ratio between the root mean square speed of $H_2$ at 50 K and that of $O_2$ at 800 K is

Which of the following has the maximum number of unpaired electrons ?

$^{27}_{13}AI$ is a stable isotope, $^{29}_{13}AI$ is expected to decay by

The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to

Sodium thiosulphate is prepared by

$KF$ combines with $HF$ to form $KHF_2.$ The compound contains the species

If $\alpha$ is the fraction of HI dissociated at equilibrium in the reaction, ${ 2HI(g) <=> H_2(g)+I_2(g)}$ starting with the 2 moles of HI, then the total number of moles of reactants and products at equilibrium are

Which of the following is the least stable and its existence is doubtful ?

An aqueous solution $FeSO_4 . Al_2(SO_4 )_3$ and chrome alum is heated with excess of $Na_2 0_2$ and filtered. The materials obtained are

Hydrolysis of one mole of peroxodisulphuric acid produces

Which one of the following oxides is neutral ?

A dilute aqueous solution of $ Na_2SO_4 $ is electrolysed using platinum electrodes. The products at the anode and cathode are respectively

Which one of the following molecules is planar?

Which has most stable +2 oxidation state?

Which one of the following has the smallest heat of hydrogenation per mole ?

Equal weights of ethane and hydrogen are mixed in an empty container at $25^\circ$ C. The fraction of the total pressure exerted by hydrogen is

The maximum possible number of hydrogen bonds a water molecule can form is

Which of the following does not characterise X-rays ?

The products of combustion of an aliphatic thiol (RSH) at 298 K are

Isomers which can be interconverted through rotation around a single bond are

Hydrogenation of benzoyl chloride in presence of $Pd$ on $BaSO_{4}$ gives