List of top Chemistry Questions asked in JEE Advanced

$KF$ 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 ?

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

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

The type of hybrid orbitals used by the chlorine atom in $ClO_2^-$ is

Which of the following have identical bond order?

The oxidation state of the most electronegative element in the products of the reaction. $ BaO_2 $ with dil, $ H_2SO_4 $ are

The reaction which proceed in the forward direction is

The reagents, $NH_4Cl$ and aqueous $NH_3$ will precipitate

There is no S- S bond in

According to kinetic theory of gases, for a diatomic molecule

1 -chlorobutane on reaction with alcoholic potash gives

The linear structure assumed by