List of top Questions asked in KEAM

Which of the following statement is true with regard to Daniell cell?
PCl\(_5\)(g), PCl\(_3\)(g) and Cl\(_2\)(g) are at equilibrium at 500 K. The equilibrium concentrations of PCl\(_3\), Cl\(_2\) and PCl\(_5\) are respectively 4.0 M, 4.0 M and 2.0 M. Calculate \( K_c \) for the reaction: \[ {PCl}_5(g) \rightleftharpoons {PCl}_3(g) + {Cl}_2(g) \]
Which of the following statement is incorrect?
Which of the following molecule is paramagnetic?
Which of the following has square planar structure?
The electronic configuration of Pd (Z = 46) is
Which of the following set of quantum numbers is possible?
10 g of alcohol is dissolved in 90 g of water. The percentage of alcohol in the solution is
When a diode is reverse biased
An intrinsic semiconductor at \( T = 0 \, {K} \) behaves like
The half-life period of a radioactive element is 2 days. If \( \frac{1}{32} \) part of the initial amount remains undecayed after a time \( t \), then the value of \( t \) in days is
The electron concentration \( n_e \) and hole concentration \( n_h \) in semiconductor are related to the number of intrinsic charge concentration \( n_i \) as
In a nuclear fusion process, the masses of the fusing nuclei are \( M_A \) and \( M_B \). Then the mass of the product nucleus \( M_C \) is related to \( M_A \) and \( M_B \) as
The particle which is expected to be emitted along with \( Y \) in the following nuclear reaction is \[ { }^{198}_{80}X \rightarrow { }^{197}_{79}Y + ? \]
The number of de Broglie waves associated with Bohr electron when it completes one revolution in its third orbit is
Young’s double-slit experiment is carried out by using green, red and blue lights, one at a time. The fringe widths recorded are \( \beta_G \), \( \beta_R \) and \( \beta_B \) respectively. Then
Whenever light travels from rarer medium into denser medium its
Electromagnetic waves of frequency \( 5 \times 10^{14} \, {Hz} \) lie in the
In an LCR series resonance circuit driven by the alternating voltage \( V = V_0 \sin \omega t \), inductance \( L = 1 \, \mu H \), capacitance \( C = 1 \, \mu F \) and resistance \( R = 1 \, k\Omega \). The resonant angular frequency (in rad/s) is:
An alternative form of Biot-Savart's law is
The ratio of radii of the circular paths of a proton and a deuteron when projected perpendicular to the direction of a uniform magnetic field with the same speed is

The energy stored in the capacitor after closing the key K is 

Two like charges kept in air medium experience a force \( F \), when they are separated by a certain distance \( r \). When the same charges are kept in a dielectric medium at the same distance of the separation, the force between them is 0.5F. The dielectric constant of the medium is
If \( E \) is the electric field intensity between the plates of a charged parallel plate capacitor, energy stored per unit volume in it is (permittivity of free space = \( \epsilon_0 \))
Speed of a transverse wave on a stretched string under tension \(T\) and linear density \(\mu\) is