JEE Main questions
34495 published questions with worked solutions.
- A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m (m << M). When the car is at rest, the...
- Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for...
- If the angular momentum of a planet of mass m, moving around the Sun in a circular orbit is L, about the center of the Sun, its...
- A particle is moving with a velocity v = K(y i + x j), where K is a constant. The general equation for its path is:
- A copper wire is stretched to make it 0.5% longer. The percentage change in its electrical resistance if its volume remains...
- Three charges +Q, q, +Q are placed respectively, at distance, 0, d/2 and d from the origin, on the x-axis. If the net force...
- A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The...
- In general, the properties that decrease and increase down a group in the periodic table, respectively, are:
- The major product of following reaction is: R - C N [(2) H_2O] (1) AlH(i - Bu)_2 ?
- The ore that contains both iron and copper is:Not in JEE Main or NEET syllabus
- The anodic half cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO_4 electrolyzed in g...
- The following results were obtained during kinetic studies of the reaction: 2A + B → Products | Experiment | [A] (in mol L^ -1 )...
- For emission line of atomic hydrogen from n_i = 8 to n_f = n, the plot of wave number ( ) against ( 1 n^2 ) will be (The Rydberg...
- The correct decreasing order for acid strength is:
- 20 mL of 0.1 M H_2SO_4 solution is added to 30 mL of 0.2 M NH_4OH solution. The pH of the resultant mixture is: [pK_b of NH_4OH =...
- The increasing order of pKa of the following amino acids in aqueous solution is: Gly Asp Lys Arg
- According to molecular orbital theory, which of the following is true with respect to Li_2^+ and Li_2^-?
- Two complexes [Cr(H_2O)_6]Cl_3 (A) and [Cr(NH_3)_6]Cl_3 (B) are violet and yellow coloured, respectively. The incorrect statement...
- Which one of the following statements regarding Henry's law is not correct?
- The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is: