List of top Questions asked in KEAM

The observed molecular weight of a 1:1 strong electrolyte is 117 g mol\(^{-1}\) as determined by the depression of freezing point method. Its theoretical molecular weight is 60 g mol\(^{-1}\). The percentage dissociation of the electrolyte is:
Which of the following aqueous mixture is a buffer solution?
Which of the following molecule has the highest dipole moment?
Which of the following isoelectronic species has the smallest radius?
The number of angular and radial nodes present in '4d' orbitals are respectively:
What is the mass of water formed when 1.6 g of methane gas is completely burnt in excess oxygen?
The correct electronic configuration of Tc (Z = 43) is:
What is the mass of crystalline oxalic acid (molar mass = 126 g/mol) present in 50 mL of 0.02N aqueous oxalic acid solution?
During the formation of p - n junction:
If \( E_c \) and \( E_v \) represent the energy of the conduction band and valence band, \( E_D \) represent the donor energy level, and the band gap in a n-type semiconductor, then the true relation among them is:
Out of the following pair of elements, identify isotones:
Plutonium nucleus undergoes fission with:
The ratio of the velocities of the electron in the second, third and fourth Bohr’s orbits of the hydrogen atom is:
If the frequency of the incident light on a metal surface is increased by 10%, then the kinetic energy of the emitted photoelectrons is increased from 0.5 eV to 0.7 eV. Then the work function of the metal is:
The de Broglie wavelength associated with the electrons accelerated by a potential of 81 V is lying in the region of electromagnetic waves:
Which one of the following phenomena does not occur when a white light falls on an equilateral glass prism?
In an Young double slit experiment without varying the distance of the screen and the slit separation, if the wavelength of monochromatic source is changed one by one in the ratio 2:3:4, then the corresponding fringe widths measured will be in the ratio:
If the power of a lens is -2.0 D, then the type and focal length \( f \) of the lens are:
If a ray of light passes through a medium, its frequency and wavelength are \( 4 \times 10^{14} \) Hz and 450 nm respectively. Then the refractive index of the medium is:
The electromagnetic waves used in LASIK and cell phones are respectively:
The ratio between the magnetic dipole moment of a revolving electron in a circular orbit to its angular momentum is (where \( e \) is the charge and \( m \) is the mass of the electron):
In an LCR resonance circuit at resonance frequency \( \omega_0 \), the quality factor \( Q \) is:
The mutual inductance between a pair of coils A and B placed close to each other depends upon:
Two straight long parallel wires carrying equal amounts of current in opposite directions placed 5 cm apart repel each other by a force \( F \). If the current in one of the wires is doubled and reversed, then the force between them is:
A proton with kinetic energy of 2 MeV is describing a circular path of radius \( R \) in a uniform magnetic field. The kinetic energy of the deuteron to describe the same circular path in the same field is: