Engineering Questions — Jee Main
379 solved questions with detailed explanations
Q.69. Match List-I with List-II. List-I: Vitamin A. Vitamin B₁ B. Vitamin B₂ C. Vitamin B₆ D. Vitamin C List-II: Name I. Pyridoxine II. Ascorbic acid III. Thiamine IV. Riboflavin Choose the correct an
Q.30. A lift of mass 1600 kg is supported by thick iron wire. If the maximum stress which the wire can withstand is and its radius is 4 mm, then maximum acceleration the lift can take is ________ . (
Q.39. Two identical long current carrying wires are bent into the shapes shown in the following figures. If the magnitude of magnetic fields at the centres P and Q of a semicircular arc are and resp
Q.13. The shortest distance between the lines and , , is :
Q.37. For the given circuit (shown in part (A)) the time dependent input voltage and corresponding output are shown in part (B) and part (C), respectively. Identify the components that are used in t
Q.44. A body of mass 2 kg is moving along x-direction such that its displacement as function of time is given by , where , and . The work done on the body during the time interval to , is ..........
Q.58. Match List-I with List-II. List-I: Electronic configuration of neutral atom (where n = 2) A. B. C. D. List-II: 1st Ionization Energy (kJ mol⁻¹) I. 2080 II. 899 III. 800 IV. 1402 Choose the c
Q.35. One mole of diatomic gas having rotational modes only is kept is a cylinder with a piston system. The cross-section area of the cylinder is 4 cm². The gas is heated slowly to raise the temperatu
Q.59. Given below are two statements : Statement (I): The first ionisation enthalpy of the elements Na, Mg, Cl and Ar follows the order Na > Mg > Cl > Ar Statement (II): Among Ca, Al, Fe and B, the th
Q.53. Consider the above sequence of reactions. The number of bromine atom(s) in the final product (P) will be: [Figure: A reaction scheme starting with nitrobenzene. 1. Br/FeBr/A (bromination of nitr
Q.45. A liquid drop of diameter 2 mm breaks into 512 droplets. The change in surface energy is J. The value of is _______ (Take surface tension of liquid = 0.08 N/m)
Q.31. A particle is rotating in a circular path and at any instant its motion can be described as . The angular acceleration of the particle after seconds is ____ rad/s.
Q.72. Consider the following sequence of reactions. [Figure: Reaction scheme starting with a diazonium salt, reacting with (i) HCl, (ii) Aniline (in excess), (iii) Warm 40-45°C, (iv) Cool, acetic acid
Q.73. 20 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution (A) is found
Q.33. Heat is supplied to a diatomic gas at constant pressure. Then the ratio of is
Q.73. A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol⁻¹) led to an elevation of the boiling point by 0.5 K. The relative lowering in the vapour pressure of the solv
Q.46. An electromagnetic wave of frequency 100 MHz propagates through a medium of conductivity, mho/m. The ratio of maximum conducting current density to maximum displacement current density is _____
Q.62. Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex ? A. d = d > d B. d = d > d C. d > d > d D. d = d < d Choose the correct answer from the options
Q.37. A particle is executing simple harmonic motion. Its amplitude is A and time period is 5 sec. the time required by it to move from to is ____ sec.
Q.17. The value of is: