List of top Questions asked in KEAM

Match the following: 

What is the color of the complex \([Ni(en)_3]^{2+}\) in water?

Benzene diazonium chloride on treatment with reagent 'X' gives iodobenzene. The reagent ‘X’ is

The order of acidity of the following compounds is:
 (i) o-Nitrophenol 
(ii) Phenol 
(iii) o-Cresol 
(iv) Ethanol

An ideal Carnot engine has an efficiency of 40 %. The ratio of the temperature of the sink to that of the source is
If a particle is moving with a momentum of (2 × 1010) h kg·m/s, then the de Broglie wavelength associated with it (in angstrom) is (where h is Planck's constant)
The angular momentum of the electron revolving in the 2nd orbit is
In the nuclear process, 1122Na → 1022Ne + e+ + νe, then X is
In a semiconductor crystal, the total number of electrons in the outer shell is 4N . At absolute zero, the number of energy states of valence and conduction band are respectively
If an electron moves with a velocity \( v \) in a magnetic field \( B \), the magnetic force on the electron is maximum when the angle between \( v \) and \( B \) is
The flux linked with a coil at any instant is given by \( \Phi = 5t^2 - 25t - 150 \) (in SI units). The emf induced in the coil at \( t = 2 \) s is
If the frequency of an electromagnetic wave is 2 MHz, then the time period of oscillation of the accelerated charge is
The eye defect astigmatism can be corrected by using a
The intensity of a polarized light can be controlled by a second polarizer from
For the oscillations of a spring with spring constant k, the false statement is
If the amplitude of the wave \( y = 3\sin(3x - 5t) + A\cos(3x - 5t) \) m is 5 m, the value of A is
In dielectrics, polarization is the dipole moment per unit
The energy density of the electric field \( 2 \, \text{V/m} \) in a capacitor \( C \) is \( \varepsilon_0 \) is the permittivity of free space
A carbon resistor has a tolerance of 20\%. As per the colour codes of resistors, the last band in that resistor is
When a current of 2 A flows through a wire for 2.5 s, the amount of heat liberated is 20 J. The resistance of the wire is
The magnetic moment of an electron revolving in an orbit of 0.5 m radius with a velocity of \( 8 \times 10^7 \, \text{m/s} \) is (in \( \text{Am}^2 \))
Angular momentum of a particle will not be zero, if the
An astronaut experiences weightlessness in space satellite because
For smaller deformations, stress is directly proportional to the strain for any material. Then the constant of proportionality is called as its
Which one of the following principles helps to explain the flow of blood in an artery?