JEE Main questions
34495 published questions with worked solutions.
- Half mole of an ideal monoatomic gas is heated at constant pressure of 1 atm from 20°C to 90°C. Work done by gas is close to:...
- The modulation frequency of an AM radio station is 250 kHz, which is 10% of the carrier wave. If another AM station approaches...Not in JEE or NEET syllabus
- The electric field of a plane polarized electromagnetic wave in free space at time t = 0 is given by an expression E(x, y) = 10 j...
- Two forces P and Q, of magnitude 2F and 3F, respectively, are at an angle θ with each other. If the force Q is doubled, then...
- The eye can be regarded as a single refracting surface. The radius of curvature of this surface is equal to that of cornea (7.8...
- A hoop and a solid cylinder of same mass and radius are made of a permanent magnetic material with their magnetic moment parallel...
- An unknown metal of mass 192 g heated to a temperature of 100°C was immersed into a brass calorimeter of mass 128 g containing...
- A particle which is experiencing a force, given by F = 3 i - 12 j, undergoes a displacement of d = 4 i. If particle had a kinetic...
- A particle executes simple harmonic motion with an amplitude of 5 cm. When the particle is at 4 cm from the mean position, the...
- A parallel plate capacitor having capacitance 12 pF is charged by a battery to a potential difference of 10 V between its plates....
- A reaction of cobalt(III) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet coloured)...
- The pair that contains two P–H bonds in each of the oxoacids is:
- In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of CO_2...
- The reaction that is NOT involved in the ozone layer depletion mechanism in the stratosphere is:
- For an elementary chemical reaction, A_2 k_ -1 k_1 2A, the expression for d[A] dt is:
- The electrolytes usually used in the electroplating of gold and silver, respectively are:
- Among the following reactions of hydrogen with halogens, the one that requires a catalyst is:Not in JEE Main or NEET syllabus
- A compound of formula A_2B_3 has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is...Not in JEE Main or NEET syllabus
- Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:Not in JEE Main or NEET syllabus
- Which of the following tests cannot be used for identifying amino acids?