Engineering Questions — Jee Main
379 solved questions with detailed explanations
Q.34. The temperature of a metal strip having coefficient of linear expansion is increased from T to T resulting in increase of its length by . The temperature is further increased from T to T, such
Q.29. The position of an object having mass kg as a function of time is given as m. At s, which of the following statements are correct? A. The linear momentum kg.m/s. B. The force acting on the
Q.27. Two cars A and B are moving in the same direction along a straight line with speeds 100 km/h and 80 km/h, respectively such that car A is moving ahead of car B. A person in car B throws a stone
Q.70. A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid and treated with K₂CrO₄ to give yellow precipitate. When
Q.47. A vessel contains of a gas at pressure 8 bar and temperature 140°C with and . It is expanded adiabatically till pressure falls to 1 bar. The work done during this process is _______ kJ. (R is
Q.60. The correct statements among the following are : A. Basic vanadium oxide is used in the manufacture of HSO. B. The spin-only magnetic moment value of the transition metal halide employed in Zieg
Q.66. Given below are two statements : Statement-I : The condensation reaction between and under optimum pH will produce . Statement-II : The molecule, [Figure: Molecule structure] will generate Ph–
Q.56. Consider the following data: (methane, g) = -X kJ mol Enthalpy of sublimation of graphite = Y kJ mol Dissociation enthalpy of H = Z kJ mol The bond enthalpy of C – H bond is given by:
Q.44. The ratio of momentum of the photons of the 1st and 2nd line of Balmer series of Hydrogen atoms is . The possible values of and are :-
Q.45. The output Y for the given inputs A and B to the circuit is: [Figure: Logic circuit diagram]
Q.25. Let f be a twice differentiable function such that , . Then is equal to ________.
Q.36. Initial pressure and volume of a monoatomic ideal gas are P and V. The change in internal energy of this gas in adiabatic expansion to volume V_final = 27 V is J.
Q.26. Match the LIST-I with LIST-II List-I List-II A. Planck's constant I. MLT B. Stopping potential II. T C. Work function III. MLT D. Threshold frequency IV. MLTA Choose the correct answer from the
Q.59. Given below are two statements : Statement-I : Aluminium is more electropositive than thallium as the standard electrode potential value of is negative and is positive. Statement-II: The sum o
Q.74. Identify the metal ions among Co²⁺, Ni²⁺, Fe²⁺, V³⁺ and Ti²⁺ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high spin octahedral complexe
Q.44. Angular momentum of an electron in a hydrogen atom is , then the energy of the electron is _______ eV.
Q.73. One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane (x) is _________.
Q.23. If the sum of the coefficients of and in the expansion of , , is zero, then the value of n is
Q.40. For a thin symmetric prism made of glass (refractive index 1.5), the ratio of incident angle and minimum deviation will be
Q.16. Let for some , be a function satisfying for all . If and , then the value of is :