JEE Main questions
34495 published questions with worked solutions.
- The number of elements in the set S = x : x [0,100] and _0^x t^2 (x-t) ,dt = x^2 is.....
- Let A = bmatrix 0 & 2 & -3 -2 & 0 & 1 3 & -1 & 0 bmatrix and B be a matrix such that B(I - A) = I + A. Then the sum of the...
- Let S denote the set of 4-digit numbers abcd such that a > b > c > d and P denote the set of 5-digit numbers having product of...
- The internal energy of a monoatomic gas is 3nRT. One mole of helium is kept in a cylinder having internal cross section area of...
- An air bubble of volume 2.9 cm ^3 rises from the bottom of a swimming pool of 5 m deep. At the bottom of the pool water...
- Which of the following pair of nuclei are isobars of the element?
- One mole of an ideal diatomic gas expands from volume V to 2V isothermally at a temperature 27^ C and does W joule of work. If...
- A circular loop of radius 7 cm is placed in uniform magnetic field of 0.2 T directed perpendicular to plane of loop. The loop is...
- Suppose a long solenoid of 100 cm length, radius 2 cm having 500 turns per unit length, carries a current I = 10 ( t) A , where =...
- The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k = 3 and permeability of = 2 _0,...
- A small metallic sphere of diameter 2 , mm and density 10.5 , g/cm ^3 is dropped in glycerine having viscosity 10 , Poise and...
- The average energy released per fission for the nucleus of _ 92 ^ 235 U is 190 , MeV . When all the atoms of 47 , g pure _ 92 ^...
- The size of the images of an object, formed by a thin lens are equal when the object is placed at two different positions 8 cm...
- A ball of radius r and density dropped through a viscous liquid of density and viscosity attains its terminal velocity at time t...
- The velocity of sound in air is doubled when the temperature is raised from 0^ C to ^ C . The value of is
- It is noticed that Pb^ 2+ is more stable than Pb^ 2+ but Sn^ 2+ is less stable than Sn^ 4+ . Observe the following reactions...
- Both human DNA and RNA are chiral molecules. The chirality in DNA and RNA arises due to the presence of
- Identify the CORRECT set of details from the following : A. [Co(NH_3)_6]^ 3+ : Inner orbital complex ; d^2sp^3 hybridized B....
- Given below are two statements: Statement I: ( CH _3)_3 C is more stable than C H _3 as nine hyperconjugation interactions are...
- Given below are two statements : Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation...