List of top Chemistry Questions asked in IIT JAM CY

A radioactive element undergoes 80% radioactive decay in 300 min. The half-life for this species in minutes is ............

Silver crystallizes in a face-centered cubic lattice. The lattice parameter of silver (in picometer) is .............

The separation of 123 planes (in nm) in an orthorhombic cell with $a = 0.25$ nm, $b = 0.5$ nm, $c = 0.75$ nm is ______ (round to two decimals).

The amount of bromine (atomic wt. = 80) required (in gram) for the estimation of 42.3 g of phenol (molecular wt. = 94 g mol$^{-1}$) is .............

In 200 g of water, 0.01 mole of NaCl and 0.02 mole of sucrose are dissolved. Assuming solution to be ideal, the depression in freezing point of water (in $^\circ$C) will be ______ (final answer rounded off to two decimal places).

The number of unpaired electron(s) in K$_2$NiF$_6$ is ...........

At an operating frequency of 350 MHz, the shift (in Hz) of resonance from TMS of a proton with chemical shift of 2 ppm is ...............

For a cell reaction, Pb(s) + Hg$_2$Cl$_2$(s) → PbCl$_2$(s) + 2Hg(l), $\left( \frac{\partial E^\circ}{\partial T} \right)_P$ is 1.45 × 10$^{-4}$ V K$^{-1}$. The entropy change (in J mol$^{-1}$ K$^{-1}$) for the reaction is ..........

The maximum number of dipeptides that could be obtained by reaction of phenylalanine with leucine is .............

Intensive variable(s) is/are

IR active molecule(s) is/are

Wave nature of electromagnetic radiation is observed in

The number of isomeric structures of di-substituted borazine (B$_3$N$_3$H$_4$X$_2$) is ..........

The number of S–S bond(s) in tetrathionate ion is ..........

Jahn-Teller distortion is observed in octahedral complexes with d-electron configuration of

The INCORRECT statement(s) among the following is/are

The indicator(s) appropriate for the determination of end point in the titration of a weak acid with a strong base is/are

Among the following, the correct statement(s) is/are

The “heme” containing protein(s) is/are

Among the following, the species having see-saw shape is/are

Ionisation energy of hydrogen atom in ground state is 13.6 eV. The energy released (in eV) for third member of Balmer series is

For a first order reaction $A(g) \rightarrow 2B(g) + C(g)$, the rate constant in terms of initial pressure $p_0$ and pressure at time $t$ ($p_t$), is given by

For a particle in a one-dimensional box of length L with potential $V(x)=0$ for $0<L>x>0$ and $V(x)=\infty$ otherwise, an acceptable wave function consistent with the boundary conditions is

The metal ion (M$^{2+}$) in the following reaction is
\[ \text{M}^{2+} + \text{S}^{2-} \longrightarrow \text{Black precipitate} \xrightarrow{\text{hot conc. HNO}_3} \text{White precipitate} \]

The correct order of enthalpy of hydration for the transition metal ions is