List of practice Questions

At 200 K, an ideal gas (X) present in a 1 L flask has a concentration of 1 mol $L^{-1}$. At the same temperature, 0.1 mole of X is added into the vessel. What is the final pressure of the gas in atm? (Given R = 0.082 L atm $mol^{-1} K^{-1}$)

The isotherms of an ideal gas at $ T_1, T_2, T_3 $ along with their slopes (m) (in the brackets) are shown here. If $ T_1 > T_2 > T_3 $, then the correct order of slopes of these isotherms is:

In neutral or faintly alkaline medium, $MnO_4^-$ oxidizes $I^-$ to iodate. What is the volume (in L) of 0.02M $KMnO_4$ required to completely convert 1 L of 0.5 M KI solution to iodate in neutral or faintly alkaline medium?
The standard enthalpy of atomization of ethane according to the equation $ \text{C}_2\text{H}_6(g) \rightarrow 2\text{C}(g) + 6\text{H}(g) $ is $ 622 \, \text{kJ mol}^{-1} $. If standard mean C-H bond dissociation enthalpy is $ 99 \, \text{kJ mol}^{-1} $, the standard mean dissociation enthalpy of C-C bond (in kJ mol$ ^{-1} $) is
The photo current in a photo diode depends on:
A message signal of frequency 14 kHz is used to modulate a carrier of frequency 900 kHz. Then, the frequencies of the sidebands are:
Which of the following sets of quantum numbers is correct for an electron in 4f orbital?
Total number of angular nodes of orbitals associated with third shell $ (n=3) $ of an atom is:
An oxide of chlorine with water gives the strongest acid. The ratio of chlorine and oxygen in its formula is:
The shiny metal disk in the electric power meter (analog type) rotates due to:
An AC voltage of $ 10 \sin \omega t $ volt is applied to a pure inductor of inductance $ 10 \, \text{H} $. The current through the inductor in ampere is:
Electromagnetic waves of energy flux $ 75 \times 10^4 \, \text{W/m}^2 $ incidents normally on a surface of area $ 40 \, \text{cm}^2 $. If the surface absorbs the flux completely, the total momentum delivered to the surface in one second is: Options:
The de Broglie wavelength of a charged particle accelerated through a potential difference $ V $ is $ \lambda $. If the potential difference is increased by 21%, the de Broglie wavelength of the charged particle is:
The minimum excitation energy of an electron revolving in the first orbit of hydrogen is:
The process that mainly takes place in stars to produce energy:

Two charges +q and -q, each 1 $\mu$C are arranged as shown in the figure. If x = 2 cm and y = 3 cm then potential difference ($V_A - V_B$) is

Switch $ S $ is closed. Now the switch is opened and the free space between the plates of the capacitors is filled with a dielectric of dielectric constant 3. The ratio of total electrostatic energy stored in the capacitors before and after the introduction of the dielectric is:

The resultant resistance between $ A $ and $ B $ in the given figure is:

In the circuit, $ E_1 = E_2 = E_3 = 2 \, \text{V} $ and $ R_1 = R_2 = 4 \, \Omega $. Then the current flowing through $ E_2 $ is:

Among the following, Ampere’s circuital law is represented by:
The radius of the path of an electron moving at a speed of $ 3.2 \times 10^7 $ ms$ ^{-1} $ in a magnetic field of $ 6 \times 10^{-4} $ T perpendicular to it is (mass of electron is $ 9 \times 10^{-31} $ kg and charge of electron is $ 1.6 \times 10^{-19} $ C)
The magnetic field lines of a bar magnet
A gas of mass 'm' and molecular weight 'M' is flowing in an insulated tube with a velocity '2V'. If the flow of the gas is suddenly stopped and all the kinetic energy is utilized to compress the gas, the increase in the temperature of the gas is ($\gamma$ is ratio of specific heats, R is universal gas constant)
Adiabatic bulk modulus of a gas at a pressure $ P $ is ($ \gamma $-ratio of specific heat capacity of the gas): Options:

In the given pressure ($ P $) - absolute temperature ($ T $) graph of an ideal gas, the relation between volumes $ V_1, V_2, V_3, $ and $ V_4 $ is: