List of top Questions asked in JEE Main

The dimension of latent heat is:
In the pulley-block system shown, the pulley and the block are ideal. If the acceleration of the block is g/8, find m1:m2 (Given m2 > m1)
acceleration of the block is g/8, find m1:m2
Velocity of a particle of mass m as a function of displacement x is given by v = ɑ√x. Work done to move it from x = 0 to x = d is:
Two persons are pulling a rope towards themselves with a force of 200 N each. If the Young's modulus is 2 x 1011 N/m2 and area of cross-section is 2 cm2 for the rope, the elongation in the rope is ____.
(distance between the persons holding the ropes is 2 m.)
A particle oscillates in simple harmonic motion such that its speed and acceleration at distance 2 m from mean position are 4 m/s and 16 m/s2 respectively. Find the amplitude of oscillation of the particle.
Assertion (A): Object at radius of curvature of biconvex lens made by glass (u = 1.5) form image at same distance an other side of the lens.
Reason (R): Image of a real object formed by concave lens is always virtual and erect.
The equivalent energy of 1 gm mass is equal to:
Find the equivalent resistance between terminal A and B for the given network.
the equivalent resistance between terminal A and B
A galvanometer having resistance of 200 Ω shows full deflection at 20 μA. If the galvanometer has to measure current up to 20 mA, the shunt resistance required is
A person covers the first half of the distance with 6 m/s and the rest half with 9 m/s and 15 m/s in two equal time intervals. Find the average speed of the journey.
For the reaction:
Gattermann–Koch reaction
Product (P) is
Which of the following has sp2 hybridisation?
Consider the following electronic configuration:
Cu2+ = [Ar] 3d44s0
Cu+ = [Ar] 3d104s0
Which option is correct?
Chemical formula of compound present in tooth enamel?
Equal volume of 1 M HCI and 1 M H2SO4 neutralized by dil. NaOH and heat released is x and y kcal respectively, then which is correct?
Which of the following orbitals has the highest energy?
Arrange the following in increasing order of acidity.
increasing order of acidity. increasing order of acidity. increasing order of acidity. increasing order of acidity. increasing order of acidity.
Consider the following compound.
Correct order of their basicity is
Correct order of their basicity is:
Which of the following is colorless?
Which among the following have a single unpaired electron?
N2, 02, CN-, O2-, C22- , N2-
S-I: Sulphur exists as S8 while oxygen exists as O2.
S-II: In oxygen, pπ-pπ bonding occurs while it is not effective in sulphur.
Consider the reaction between PbS and HNO3.
PbS + HNO3 →
Which of the following is not formed.
Which of the following statements is incorrect?
A ray of light passing through (1, 2) after reflecting on x-axis at point Q passes through R(3, 4). If S(h, k) is such that PQRS is a parallelogram, then find the value of hk2.
Tetrahedral dice having outcomes (1, 2, 3, 4) has 3 outcomes a, b, c (which are visible). Probability that ax2 + bx + c = 0 has real roots is m/n (m, n are coprime), then m + n =?