IAT (IISER) 2026

What are X and P in the following reaction sequence?

What is the ratio of the velocity of an electron in the fourth orbit of $\text{Be}^{3+}$ to the velocity of the electron in the second orbit of $\text{He}^+$?

What is the order of bond energy between C=S $&$ C=Te, and between Cl–Cl $&$ F–F?

Which one of the following molecules shows an increase in bond order after loss of an electron from the highest occupied molecular orbital?

The rate constant of a reaction at 600 K with an activation energy of $191.47$ kJ mol$^{-1}$ is $5.0 \times 10^{-5}$ s$^{-1}$. What is the temperature at which the half-life of the reaction becomes 152 s? [Consider pre-exponential factor an...

What is the order of $\text{p}K_b$ for the following molecules in an aqueous medium?

Metal-ligand $\pi$-bond formation in $\text{Mn}_2(\text{CO})_{10}$ and $[\text{MnO}_4]^-$ requires electron-pair donation between metal and ligand orbitals. Which one of the following represents the direction of electron-pair donation?

Which one of the following octahedral complexes has the highest spin-only magnetic moment?

Which one is an INCORRECT statement with regard to the following reaction?

Which one of the following molecules is chiral?

For two pure volatile liquids X and Y, attractive intermolecular interactions of both X-X and Y-Y are weaker than those of X-Y. The total vapour pressure of an equimolar solution of X and Y is $p_{total}$. The vapour pressure of pure X and ...

Consider the following silica-gel based thin-layer chromatogram of compounds A and B. Which one of the following statements is correct?

What are the numbers of protons ($\text{H}^+$) and electrons ($\text{e}^-$), respectively, required for the reduction of $[\text{Cr}_2\text{O}_7]^{2-}$ to $\text{Cr}^{3+}$ under an aqueous acidic condition?

100 mL of 1.0 M aqueous NaOH solution was diluted to 1.0 L by adding water. Half of this solution was discarded. A new 100 mL of 0.5 M aqueous NaOH solution was added to the remaining solution. What is the concentration of the final aqueous...

An ideal gas goes through a reversible isothermal expansion (solid line) followed by a reversible adiabatic expansion (dashed line). Which of the following diagram(s) closely depict(s) the entire process?