NEET 2020 Question Paper with Solutions

Dimensions of stress are: \([ML^2T^{-2}]\) \([ML^0T^{-2}]\) \([ML^{-1}T^{-2}]\) \([MLT^{-2}]\)

The average thermal energy for a mono-atomic gas is: (\(k_B\) is Boltzmann constant and T absolute temperature) \(\frac{3}{2}k_BT\) \(\frac{5}{2}k_BT\) \(\frac{7}{2}k_BT\) \(\frac{1}{2}k_BT\)

Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The centre of mass of the system from the 5 kg particle is nearly at a distance of: 50 cm 67 cm 80 cm 33 cm

The phase difference between displacement and acceleration of a particle in a simple harmonic motion is: \(\frac{3\pi}{2}\ \text{rad}\) \(\frac{\pi}{2}\ \text{rad}\) zero \(\pi\ \text{rad}\)

A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is: 0.25 mm 0.5 mm 1.0 mm 0.01 mm

The following metal ion activities many enzymes participates in the oxidation of glucose to produce ATP and with Na is responsible for the transmission of nerve signals. Copper Calcium Potassium Iron

A mixture of \(N_2\) and Ar gases in a cylinder contains 7 g of \(N_2\) and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar the partial pressure of \(N_2\) is: [Use atomic masses (in g \(mol^{-1}\)): N = 14 Ar = 40] 12 bar 15 bar 18 bar 9 bar

The correct option for free expansion of an ideal gas under adiabatic condition is: q = 0 \(\Delta T 0 q 0 \(\Delta T > 0\) and w > 0 q = 0 \(\Delta T = 0\) and w = 0

Hydrolysis of sucrose is given by the following reaction. Sucrose + \(H_2O\) \(\rightleftharpoons\) Glucose + Fructose If the equilibrium constant (\(K_c\)) is \(2 \times 10^{13}\) at 800 K the value of \(\Delta_r G^\circ\) at the same temperature will be: \(8.314\ \text{J mol}^{-1}\ \text{K}^{-1} \times 300\text{K} \times \ln(2 \times 10^{13})\) \(8.314\ \text{J mol}^{-1}\ \text{K}^{-1} \times 300\text{K} \times \ln(3 \times 10^{13})\) \(-8.314\ \text{J mol}^{-1}\ \text{K}^{-1} \times 300\text{K} \times \ln(4 \times 10^{13})\) \(-8.314\ \text{J mol}^{-1}\ \text{K}^{-1} \times 300\text{K} \times \ln(2 \times 10^{13})\)

For the reaction \(2Cl(g) \rightarrow Cl_2(g)\) the correct option is: \(\Delta_r H > 0\) and \(\Delta_r S 0\) \(\Delta_r H 0\) and \(\Delta_r S > 0\)

The capacitance of a parallel plate capacitor with air as medium is \(6\mu F\). With the introduction of a dielectric medium the capacitance become \(30\mu F\) The permittivity of the medium is: (\(\epsilon_0 = 8.85 \times 10^{-12}\ \text{C}^2\ \text{N}^{-1}\ \text{m}^{-2}\)) \(1.77 \times 10^{-12}\ \text{C}^2\ \text{N}^{-1}\ \text{m}^{-2}\) \(0.44 \times 10^{-10}\ \text{C}^2\ \text{N}^{-1}\ \text{m}^{-2}\) \(5.00\ \text{C}^2\ \text{N}^{-1}\ \text{m}^{-2}\) \(0.44 \times 10^{-13}\ \text{C}^2\ \text{N}^{-1}\ \text{m}^{-2}\)

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is: (\(\mu_0 = 4\pi \times 10^{-7}\ \text{TmA}^{-1}\)) \(3.14 \times 10^{-4}\ \text{T}\) \(6.28 \times 10^{-5}\ \text{T}\) \(3.14 \times 10^{-5}\ \text{T}\) \(6.28 \times 10^{-4}\ \text{T}\)

A short electric dipole has a dipole moment of \(16 \times 10^{-9}\ \text{Cm}\). The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole situated on a line making an angle of \(60^\circ\) with the dipole axis is: (\(\frac{1}{4\pi\epsilon_0} = 9 \times 10^9\ \text{Nm}^2/\text{C}^2\)) 200 V 400 V zero 50 V

The increase in the width of the depletion region in a p-n junction diode is due to: reverse bias only both forward bias and reverse bias increase in forward current forward bias only

A charged particle having drift velocity \(7.5 \times 10^{-4}\ \text{ms}^{-1}\) in an electric field of \(3 \times 10^{-10}\ \text{Vm}^{-1}\) has a mobility in \(m^2 V^{-1} s^{-1}\) of: \(2.5 \times 10^6\) \(2.5 \times 10^{-6}\) \(2.25 \times 10^{-15}\) \(2.25 \times 10^{15}\)

An increase in the concentration of the reactants of a reaction leads to change in: heat of reaction threshold energy collision frequency activation energy

The number of Faradays(F) required to produce 20 g of calcium from molten \(CaCl_2\) (Atomic mass of Ca = 40 g \(mol^{-1}\)) is: 2 3 4 1

Identify compound X in the following sequence of reactions:

Sucrose on hydrolysis gives: \(\alpha\)-D-Glucose + \(\beta\)-D-Glucose \(\alpha\)-D-Glucose + \(\beta\)-D-Fructose \(\alpha\)-D-Fructose + \(\beta\)-D-Fructose \(\alpha\)-D-Glucose + \(\beta\)-D-Fructose

Measuring Zeta potential is useful in determining which property of colloidal solution? Solubility Stability of the colloidal particles Size of the colloidal particles Viscosity