List of practice Questions

Ethylene glycol, on oxidation with periodic acid, gives:
What is X in the following change?
In Young’s double slit experiment, the central point on the screen is:
The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 litres to 20 litres at 25°C is:
A Fischer projection of (2R, 3S)-2,3-butanediol is:
Arrange the following particles in increasing order of values of \( e/m \) ratio: electron (e), proton (p), neutron (n) and \( \alpha \)-particle (\( \alpha \)):
Acidified potassium dichromate is treated with hydrogen sulfide. In the reaction, the oxidation number of chromium:
For the reaction \( N_2 + 3H_2 \rightarrow 2NH_3 \), if \( \frac{\Delta [NH_3]}{\Delta t} = 2 \times 10^{-4} \, \text{mol L}^{-1} \text{s}^{-1} \), then the value of \( \frac{\Delta [H_2]}{\Delta t} \) would be:
In Young’s double slit experimental setup, if the wavelength alone is doubled, the bandwidth \( \beta \) becomes:
When a system is taken from state i to state f along the path iaf, it is found that \( Q = 50 \, \text{cal} \) and \( W = 20 \, \text{cal} \). Along the path ibf, \( Q = 36 \, \text{cal} \). W along the path ibf is:
If the differential equation for a simple harmonic motion is \( \frac{d^2 y}{dt^2} + 2y = 0 \), the time-period of the motion is:
Tube A has both ends open while tube B has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube A and B is:
The current in the 1\(\Omega\) resistor shown in the circuit is:
The work done by an uniform magnetic field, on a moving charge is:
A solid cylinder of mass \( m \) and radius \( R \) rolls down an inclined plane without slipping. The speed of its C.M. when it reaches the bottom is:
A block of mass 5 kg resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass 5 kg. The coefficient of kinetic friction between the block and the surface is 0.5. Tension in the cord is:
A and B are two wires. The radius of A is twice that of B. They are stretched by the same load. Then the stress on B is:
A liquid is allowed to flow into a tube of truncated cone shape. Identify the correct statement from the following.
A planet revolves in an elliptical orbit around the sun. The semi-major and semi-minor axes are \( a \) and \( b \). Then the square of the time period, \( T \), is directly proportional to:
The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is: (hc = 1240 eV·nm)
In an electromagnetic wave:
A particle covers half of the circle of radius \( r \). Then the displacement and distance of the particle are respectively:
A metal ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet is:
A particle having a mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of \( 60^\circ \). The magnitude of the change in momentum (in N-sec) of the particle after 10 seconds is:
For a series RLC circuit \( R = X_L = 2X_C \). The impedance of the circuit and phase difference between \( V \) and \( I \) respectively will be: