JEE Main questions
34495 published questions with worked solutions.
- A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point,...
- The pitch and the number of divisions, on the circular scale, for a given screw gauge are 0.5 mm and 100 respectively. When the...
- A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. The...
- A 15 g mass of nitrogen gas is enclosed in a vessel at a temperature 27ºC. Amount of heat transferred to the gas, so that rms...
- A particle is executing simple harmonic motion (SHM) of amplitude A, along the x-axis, about x = 0. When its potential Energy...
- The energy required to take a satellite to a height 'h' above Earth surface (radius of Earth = 6.4 10^ 3 km) is E_1 and kinetic...
- A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from...
- A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic...
- The energy associated with electric field is (U_E) and with magnetic field is (U_B) for an electromagnetic wave in free space....
- Two point charges q_1 ( 10 μC) and q_2 (−25 μC) are placed on the x-axis at x = 1 m and x = 4 m respectively. The electric field...
- Which of the following combination of statements is true regarding the interpretation of the atomic orbitals? (a) An electron in...
- A solution containing 62 g ethylene glycol in 250 g water is cooled to −10ºC. If K_f for water is 1.86 K kg mol^ -1 , the amount...
- For the following reaction, the mass of water produced from 445 g of C_ 57 H_ 110 O_6 is: 2C_ 57 H_ 110 O_6(s) + 163O_2(g) →...
- If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction Zn(s) + Cu^ 2+ (aq)...
- The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is: (Specific heat of water...
- For the reaction, 2A + B → products, when the concentrations of A and B both were doubled, the rate of the reaction increased...
- The increasing basicity order of the following compounds is: (A) CH_3CH_2NH_2 (B) CH_3CH_2NH(CH_2CH_3) (C) (CH_3)_3N (D)...
- Homoleptic octahedral complexes of a metal ion 'M^ 3+ ' with three monodentate ligands L_1, L_2 and L_3 absorb wavelengths in the...
- When the first electron gain enthalpy ( _ eg H) of oxygen is −141 kJ/mol, its second electron gain enthalpy is:
- Consider the following reversible chemical reactions: A_2(g) + B_2(g) ⇌ 2AB(g); K_1 …(1) 6AB(g) ⇌ 3A_2(g) + 3B_2(g); K_2 …(2) The...