Engineering Questions — Jee Main
379 solved questions with detailed explanations
Q.34. An ideal gas at pressure P and temperature T is expanding such that . The coefficient of volume expansion of the gas is
Q.8. If the coefficients of the middle terms in the binomial expansions of and , , are equal, then the value of is:
Q.56. The reaction was initiated with the amount 'a' of A(g). At equilibrium it is found that the amount of A(g) remaining is (a -x) at a total pressure of p. The equilibrium constant K of the reacti
Q.52. What is the energy (in J atom) required for the following process ? Li(g) Li(g) + e (Take the ionization energy for the H atom in the ground state as J atom)
Q.42. An infinitely long straight wire carrying current I is bent in a planer shape as shown in the diagram. The radius of the circular part is r. The magnetic field at the centre O of the circular lo
Q.60. Given below are two statements: Statement-I: The correct order in terms of atomic/ionic radii is Al > Mg > Mg > Al. Statement-II: The correct order in terms of the magnitude of electron gain ent
Q.66. The descending order of acidity among the following compounds is A. [Figure: Phenol] B. [Figure: p-nitrophenol] C. [Figure: p-methoxyphenol] D. [Figure: Benzoic acid] E. [Figure: p-methylphenol
Q.28. The total length of potentiometer wire AB is 50 cm in the arrangement as shown in figure. If P is the point where the galvanometer shows zero reading then the length AP is .......... cm. [Figure
Q.35. Match List-I with List-II.List-I: A. , B. , C. , D. . List-II: I. Periodic with time period but not simple harmonic motion (SHM), II. Periodic with time period but Not SHM, III. periodic with
Q.24. Let A, B and C be the vertices of a variable right angled triangle inscribed in the parabola y = 16x. Let the vertex B containing the right angle be (4, 8) and the locus of the centroid of ABC b
Q.44. Assuming the experimental mass of as 12u, the mass defect of atom is MeV/c². (Mass of proton = 1.00727u, mass of neutron = 1.00866 u, 1 u = 931.5 MeV/c² and c is the speed of the light in vacu
Q.42. A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm carrying a current of 2 A. The magnetic energy stored inside the cube is J. The value of is ( Tm/A, )
Q.54. At 27° C, 0.1 M, 1 L K₄[Fe(CN)₆] aqueous solution and 0.1 M, 1 L FeCl₃ aqueous solution are placed in a container separated by a semi permeable membrane AB. Assume complete dissociation of both
Q.75. For a reaction A P at T K, the half life () is plotted as a function of initial concentration of A as given below : [Figure: Graph of vs ] The value of x in the given figure is ______ s (Near
Q.46. A diode has Zener voltage of 10V and maximum power dissipation of 0.5W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25V power supply is
Q.45. As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface. If refractive index of the material of prism is , the angle of
Q.30. The height in terms of radius of the earth (R), at which the acceleration due to gravity becomes where g is acceleration due to gravity on earth's surface, is
Q.64. The total number of aromatic compounds/species from the following is[Figure: Six chemical structures are shown. From left to right, top to bottom: 1. Benzene, 2. Naphthalene, 3. Anthracene, 4. C
Q.75. MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K MX(s) M⁺(aq) + X⁻(aq); K = 10⁻¹⁰ If the standard reduction potential for M⁺(aq) + e⁻ → M(s) is (E°) = 0.79V