List of top Questions asked in IIT JAM CY- 2026

Choose the correct option(s) with regard to haemoglobin (Hb)
The reactions of Li, Na and K with an excess of oxygen results in the formation of X, Y and Z respectively, as major productsThe correct option(s) is/are
In the van der Waals equation of state, the volume correction factor (b) arises from the repulsive interactions between the gas moleculesConsidering the molecules to behave as hard spheres of radius r, b = Y $\times$ V$_{\text{molecule}}$ $\times$ N$_A$The value of Y is _ _ _.
For the transformation of 1 mole of an ideal gas from an initial temperature of 27$^\circ$C and an initial pressure of 1 atm to a final temperature of 327$^\circ$C and a final pressure of 17 atm, the change in enthalpy, $\Delta H$, is _ _ _ kJ
The reaction(s) that give(s) tert-butylbenzene as the major product is/are
The possible value(s) of energy ($E$) obtained from setting the following determinant equal to zero is/are
The species that has ‘T’ shape is _ _ _.
For the reaction NO$_2$Cl $\rightarrow$ NO$_2$ + $\frac{1}{2}$Cl$_2$, the proposed mechanism involves the following two elementary steps:
NO$_2$Cl $\xrightarrow{k_1}$ NO$_2$ + Cl
NO$_2$Cl + Cl $\xrightarrow{k_2}$ NO$_2$ + Cl$_2$
Assuming steady state approximation for Cl, the correct expression for the rate of formation of NO$_2$ is
The solid having the least packing efficiency is _ _ _.
The ligand to metal charge transfer (LMCT) transition energy of the given ions follows the order
The correct pair in which both the complex ions show the ground state electronic degeneracy is
The complex having the lowest molar extinction coefficient is
D-Glucose (structure given below) and its stereoisomers undergo oxidation with conc. HNO$_3$ to give the corresponding dicarboxylic acidsThe number of stereoisomers of glucose that would give meso-dicarboxylic acid is
Among the following, the one that has the lowest melting point is
The correct order of F–M–F bond angle of compounds given in the options is (where M represents the central element)
The correct order of bond length between carbon and oxygen atoms in the metal carbonyls given in the options is
Reaction that yields P as the major product is
The molecules that possess $\sigma$ (plane of symmetry) as the ONLY element of symmetry are
The major product P formed in the following transformation is
The major products M and N formed in the following reaction sequence are
The major products X and Y formed in following reaction sequence are
A mono-substituted aromatic compound P decolourizes bromine water, gives a purple red colour with aqueous FeCl$_3$ and is also soluble in aqueous NaOHCompound P undergoes acetylation with reagent Q in the presence of a base to give R as the major productReagent Q displays two characteristic bands at 1830 cm$^{-1}$ and 1750 cm$^{-1}$ in its IR spectrumP, Q and R are
For an ideal gas, the isothermal compressibility $k_T = -\frac{1}{V}\left(\frac{\partial V}{\partial P}\right)_T$ is _ _ _.
The Lennard-Jones (LJ) potential of interaction between two molecules as a function of distance ($r$), is given by $V_{LJ}(r) = 4\epsilon \left[ \left(\frac{\sigma}{r}\right)^{12} - \left(\frac{\sigma}{r}\right)^6 \right]$, where $\epsilon$ and $\sigma$ are constantsThe expression of $r$ at which $V_{LJ}(r)$ reaches minimum is _ _ _.
The molecule that has ONLY one lone pair of electrons on xenon is _ _ _.