JEE Main questions
34495 published questions with worked solutions.
- A solid sphere and a hollow sphere of the same mass and of same radius are rolled on an inclined plane. Let the time taken to...
- In photoelectric effect, the stopping potential (V_0) v/s frequency ( ) curve is plotted. (h is the Planck's constant and _0 is...
- The energy E and momentum p of a moving body of mass m are related by some equation. Given that c represents the speed of light,...
- A tightly wound long solenoid carries a current of 1.5 A. An electron is executing uniform circular motion inside the solenoid...
- The ratio of the power of a light source S_1 to that the light source S_2 is 2. S_1 is emitting 2 10^ 15 photons per second at...
- The increase in pressure required to decrease the volume of a water sample by 0.2% is P × 10^5Nm^ -2 . Bulk modulus of water is...
- Acceleration due to gravity on the surface of earth is 'g'. If the diameter of earth is reduced to one third of its original...
- Based on the data given below : E^0_ Cr_2O_7^ 2- /Cr^ 3+ = 1.33V, E^0_ Cl_2/Cl^- = 1.36V, E^0_ MnO_4^-/Mn^ 2+ = 1.51V, E^0_ Cr^...
- For hydrogen atom, the orbital/s with lowest energy is/are : (A) 4s (B) 3p_x (C) 3d_ x^2-y^2 (D) 3d_ z^2 (E) 4p_z Choose the...
- Which of the following mixing of 1M base and 1M acid leads to the largest increase in temperature?
- The elemental composition of a compound is 54.2%, C, 9.2% H and 36.6% O. If the molar mass of the compound is 132 g mol^ -1 , the...
- When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change...
- The conditions and consequence that favours the t_ 2g ^3, e_g^1 configuration in a metal complex are :
- Identify correct statement/s : (A) —OCH3 and —NHCOCH3 are activating group (B) —CN and —OH are meta directing group (C) —CN and...
- Given below are two statements : Statement (I) : The first ionization energy of Pb is greater than that of Sn Statement(II) : The...
- S(g) + 3 2 O_2(g) SO_3(g) + 2x kcal SO_2(g) + 1 2 O_2(g) SO_3(g) + y kcal The heat of formation of SO2(g) is given by :
- The successive 5 ionisation energies of an element are 800, 2427, 3658, 25024 and 32824 kJ/mol, respectively. By using the above...
- The observed and normal masses of compound MX2 are 65.6 and 164 respectively. The percent degree of ionisation of MX2 is...
- The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is __________.
- Consider a complex reaction taking place in three steps with rate constants k_1, k_2 and k_3 respectively. The overall rate...