List of top Questions asked in COMEDK UGET

Number of atoms in 560 $cm^3$ of oxygen at S.T.P. is
A particle executes simple harmonic motion with amplitude A. The distance moved by the particle in one oscillation is
The current in a coil changes from 1 mA to 5 mA in 4 ms. ? If the coefficient of self-inductance of the 'coil is 10 mH,. the magnitude of "self-induced" emf is?
The atomic number of the element with highest ionization energy among the following is
The heat of formation of $ {H_2O_{(l)}}$ is -286 kJ. The? heat of formation of $ { H_2O_{(g)}}$ is likely to be
LCD stands for
A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5 N on it. If $\mu,$ between the wall? and the block is 0.5, the magnitude of the frictional force acting on the block is
Which one of the following ores is obtained by floatation process?
If $\alpha, \beta , \gamma$ are the roots of the equation $x^3 - 3x^2 + 2x - 1 = 0$ then the value of $[(1 - \alpha) (1 -\beta )(1 - \gamma)]$ is
If $x =at + bt^2$ where $x$ is measured in m and t ins, thenthe dimension of (b/a) is
The oxidation number of oxygen is -1 in
A ring rolls down an inclined plane. The ratio of rotational kinetic energy to translational kinetic energy is
In Lassaigne's test for nitrogen in an organic compound, the blue colouration is due to the formation of
For the dissociation of limestone in the slag zone of the blast furnace, the reaction is
The conjugate acid of $ NH_2^- $ is
A mass of 0.1 kg is hung at the 20 cm mark from a 1 m rod weighing 0.25 kg pivoted at its centre. The rod will not topple if
An electron having spin quantum number, $s = -1/2$ and magnetic quantum number, $m = + 3$ can be present in
A particle is moving eastward with velocity $5 \, m \, s^{-1}$ In 10 s the velocity changes to $5\, m\, s^{-1}$ northwards. The average acceleration in this time is
Two ions $A^+$ and $B^-$ have radii 104 and 200 pm respectively, in a cubic close packed crystal of compound AB. The co-ordination no. of A is
The layer in earth's atmosphere which reflects radio waves from the earth thus, helping radio communication is
The ratio of speed of sound in Hydrogen to that in Oxygen at the same temperature is
Two point charges $Q_1 = 2 \mu C$ and $ Q_2 = 1 \mu C$ are placed as shown. The coordinates of the point P are (2 cm, 1 cm). The electric intensity vector at P subtends an angle $\theta$ with the positive X-axis. The value of $\theta$ is given by
In the case of the Bohr atom model, if $E_k$ and $U$ are the kinetic and potential energies of an electron in an orbit then,
A glass hemisphere of radius 0.1 cm and refractive index 1.5 is placed over a spot on a table and the spot is viewed from above. The spot appears to be
According to Faraday's law of electromagnetic induction, an emf is induced in a coil if