Engineering Questions — JEE Main
409 solved questions with detailed explanations
Q.52. If shortest wavelength of hydrogen atom in Lyman series is x, then longest wavelength in Balmer series of He is :
Q.23. Let . If the probability, that for all , is , where , then is equal to
Q.49. A three coulomb charge moves from the point (0, -2, -5) to the point (5, 1, 2) in an electric field expressed as N/C. The work done in moving the charge is ________ J.
Q.69. Match the List-I with List-II : List-I: Deficiency Disease (A) Scurvy (B) Convulsions (C) Cheilosis (D) Xerophthalmia List-II: Vitamin I. Pyridoxine II. Vitamin A III. Ascorbic Acid IV. Riboflav
Q.13. If the point of intersection of the lines and lies on xy-plane, then the value of is :
Q.58. Given below are two statements : Statement-I : The number of pairs among and that contain oxides of same nature (acidic, basic, neutral or amphoteric) is 4. Statement-II : Among and , the mos
Q.75. Consider the reaction X Y at 300 K. If and K are 28.40 kJ mol and 1.8 10 at the same temperature, then the magnitude of for the reaction in J K mol is ______.(Nearest Integer). (Given : R =
Q.1. Let [] denote the greatest integer function. If the domain of the function is , then is equal to :
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: