List of practice Questions

A sample of gas absorbs 4000 kJ of heat and surrounding does 2000 J of work on sample. What is the value of \(\Delta U\)?

Identify the symbol used for water according to Dalton's atomic theory.

Which of the following alcohols needs acidic KMnO\(_4\) to convert it into aldehyde or ketone?

How many electrons are involved in the reaction when 0.40 F of electricity is passed through an electrolytic solution?

Which among the following amino acids has the lowest molar mass?

Two vectors of same magnitude have a resultant equal to either of the two vectors. The angle between two vectors is

A charge \( q \) moves with velocity \( \vec{v} \) through electric field \( \vec{E} \) as well as magnetic field \( \vec{B} \). Then the force acting on it is

The density of a metal at normal pressure \( P \) is \( \rho \). When it is subjected to an excess pressure, the density becomes \( \rho' \). If \( K \) is the bulk modulus of the metal, then the ratio \( \frac{\rho'}{\rho} \) is

A small metal sphere of mass \( M \) and density \( \rho_1 \), when dropped in a jar filled with liquid moves with terminal velocity after some time. The viscous force acting on the sphere is
\textit{(where \( \rho_2 \) is the density of liquid, \( g \) is the gravitational acceleration)}

Which among the following is an example of allylic alcohol?

In diffraction experiment, from a single slit, the angular width of the central maxima does NOT depend upon

A vehicle of mass \( M \) is moving with momentum \( P \) on a rough horizontal road. The coefficient of friction between the tyres and the horizontal road is \( \mu \). The stopping distance is
\textit{(g = acceleration due to gravity)}

A bullet of mass \( m \) moving with velocity \( v \) is fired into a wooden block of mass \( M \). If the bullet remains embedded in the block, the final velocity of the system is

An alternating e.m.f. of 0.2 V is applied across an LCR series circuit having \( R = 4 \, \Omega \), \( C = 80 \, \mu \text{F} \), and \( L = 200 \, \text{mH} \). At resonance, the voltage drop across the inductor is

For a gas, \( \frac{R}{C_V} = 0.4 \), where \( R \) is universal gas constant and \( C_V \) is the molar specific heat at constant volume. The gas is made up of molecules which are

Two identical bar magnets each of magnetic moment \( M \), separated by some distance are kept perpendicular to each other. The magnetic induction at a point at the same distance \( d \) from the centre of magnets, is
\textit{( \( \mu_0 \) = permeability of free space)}

The maximum velocity of the photoelectron emitted by the metal surface is \( V \). Charge and mass of the photoelectron are denoted by \( e \) and \( m \) respectively. The stopping potential in volt is

When a photon enters glass from air, which one of the following quantity does NOT change?

Two identical strings of length \( l \) and \( 2l \) vibrate with fundamental frequencies \( N \) hertz and \( 1.5N \) hertz, respectively. The ratio of tensions for smaller length to larger length is

The force acting on the electrons in hydrogen atom (Bohr’s theory) is related to the principle quantum number \( n \) as

When open pipe is closed from one end then third overtone of closed pipe is higher in frequency by 150 Hz than second overtone of open pipe. The fundamental frequency of open end pipe will be

In common emitter amplifier, input resistance is \( 1000 \, \Omega \), peak value of input signal voltage is 5 mV and \( \beta = 60 \). The peak value of output current is

A monoatomic gas of pressure \( P \) having volume \( V \) expands isothermally to a volume \( 2V \) and then adiabatically to a volume \( 16V \). The final pressure of the gas is
\textit{(Ratio of specific heats = \( \frac{5}{3} \))}

A ray of light is incident at an angle \( i \) on one face of a prism of small angle \( A \) and emerges normally from the other surface. \( \mu \) is the refractive index of the material of the prism. The angle of incidence is

A moving body is covering distances which are proportional to the square of the time. Then the acceleration of the body is