JEE Main questions
34495 published questions with worked solutions.
- A man (mass = 50 kg) and his son (mass = 20 kg) are standing on a frictionless surface facing each other. The man pushes his son...
- A submarine (A) travelling at 18 km/hr is being chased along the line of its velocity by another submarine (B) travelling at 27...
- The correct set of species responsible for the photochemical smog is:Not in JEE Main or NEET syllabus
- The mole fraction of a solvent in aqueous solution of a solute is 0.8. The molality (in mol kg^ -1 ) of the aqueous solution is:
- Glucose and Galactose are having identical configuration in all the positions except position:
- The correct sequence of thermal stability of the following carbonates is:Not in JEE Main or NEET syllabus
- What is the molar solubility of Al(OH)_3 in 0.2 M NaOH solution? Given that, solubility product of Al(OH)_3 = 2.4 10^ -24 :
- Peptization is a:Not in JEE Main or NEET syllabus
- Enthalpy of sublimation of iodine is 24 cal g^ -1 at 200 °C. If specific heat of I_2(s) and I_2(vap) are 0.055 and 0.031 cal g^...
- The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y,...Not in JEE Main or NEET syllabus
- An organic compound 'A' is oxidized with Na_2O_2 followed by boiling with HNO_3. The resultant solution is then treated with...
- An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is:
- An element has a face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of two nearest...Not in JEE Main or NEET syllabus
- In the following reaction; xA → yB: _ 10 [- d[A] dt ] = _ 10 [ d[B] dt ] + 0.3010. 'A' and 'B' respectively can be:
- The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are:
- 5 moles of AB_2 weigh 125 10^ -3 kg and 10 moles of A_2B_2 weigh 300 10^ -3 kg. The molar mass of A (M_A) and molar mass of B...
- An example of a disproportionation reaction is:
- Given: Co^ 3+ + e^- → Co^ 2+ ; E° = +1.81 V; Pb^ 4+ + 2e^- → Pb^ 2+ ; E° = +1.67 V; Ce^ 4+ + e^- → Ce^ 3+ ; E° = +1.61 V; Bi^ 3+...
- The integral 2x^3 - 1 x^4 + x dx is equal to: (Here C is a constant of integration)
- For x ∈ (0, 3/2), let f(x) = x, g(x) = tan x and h(x) = 1 - x^2 1 + x^2 . If φ(x) = ((hof)og)(x), then ( 3 ) is equal to: