List of top Questions asked in KEAM

Consider the equilibrium obtained by electrically connecting zinc-amalgam (Zn(Hg)) and HgO electrodes in mercury cell, $ \text{Zn(Hg)} + \text{HgO(s)} \rightleftharpoons \text{ZnO(s)} + \text{Hg(l)} $. Under this equilibrium, what is the relation between the potential of the Zn(Hg) and HgO electrodes measured against the standard hydrogen electrode?}

Hybridisation of carbon in CH$_3^-$

10 g of MgCO$_3$ decomposes on heating to 0.1 mole CO$_2$ and 4 g MgO. The percent purity of MgCO$_3$ is

The compound Na$_2$CO$_3 \cdot x$H$_2$O has 50 % H$_2$O by mass. The value of $x$ is

The common features among CO, CN$^-$ and NO$_2^+$ are

The freezing point of equimolal aqueous solutions will be highest for

The molality of the 3M solution of methanol if the density of the solution is $0.9\ \text{g cm}^{-3}$ is}

Solubility product $(K_{sp})$ of saturated PbCl$_2$ in water is $1.8 \times 10^{-4}\ \text{mol}^3\text{dm}^{-9}$. What is the concentration of Pb$^{2+}$ in the solution?}

For the process $\frac{3}{2}A \rightarrow B$, at 298 K, $\Delta G^\circ$ is $163\ \text{kJ mol}^{-1}$. The composition of the reaction mixture is $[B]=1$ and $[A]=10000$. Predict the direction of the reaction and the relation between reaction quotient $(Q)$ and the equilibrium constant $(K)$.}

In the $\ln K$ vs $\frac{1}{T}$ plot of a chemical process having $\Delta S^\circ > 0$ and $\Delta H^\circ < 0$, the slope is proportional to (where $K$ is equilibrium constant)}

Which of the following is not true about a catalyst?

A gas will approach ideal behaviour at

Pressure of ideal and real gases at $0$ K are

Mixing of $N_2$ and $H_2$ form an ideal gas mixture at room temperature in a container. For this process, which of the following statement is true?

For the process $A(l,\,0.05\,\text{atm},\,32^\circ C) \rightarrow A(g,\,0.05\,\text{atm},\,32^\circ C)$, the correct set of thermodynamic parameters is

Among the following, the molecule that will have the highest dipole moment is

Which of the following pair have identical bond order?

Uncertainty principle is valid for

A torque of $1$ N m is applied to a wheel which is at rest. After $2$ seconds the angular momentum in kg m$^2$/s is

A wheel rotating at $12$ rev/s is brought to rest in $6$ s. The average angular deceleration in rad/s$^2$ of the wheel during this process is

Eight grams of Cu$^{66}$ undergoes radioactive decay and after 15 minutes only 1 g remains. The half-life, in minutes, is then}

The energy of an electron in the $3S$ orbital (excited state) of H-atom is

For a light nuclei, which of the following relation between the atomic number (Z) and mass number (A) is valid

If a magnet is dropped through a vertical hollow copper tube then

An electric motor when loaded has an effective resistance of $30\,\Omega$ and an inductive reactance of $40\,\Omega$. If the motor is powered by a source with maximum voltage of $420\,V$, the maximum current is