Engineering Questions — Chemistry — JEE Main
145 solved questions with detailed explanations
Q.55. Consider the following reactions in which all the reactants and products are present in gaseous state , , The value of for the equilibrium is :
Q.56. At , 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the start of the titration (when NaOH has not been added) and (b) when 10 mL of NaOH i
Q.74. At 298 K, the molar conductivity of x% (w/w) MX solution (aqueous) is 123.5 S cm mol. The conductance of same solution is S. The value of x is ______ . (Given : cell constant = 1.3 cm; molar ma
Q.57. One half cell in a voltaic cell is constructed by dipping silver rod in solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of . A voltage of 1.60 V is measu
Q.52. If shortest wavelength of hydrogen atom in Lyman series is x, then longest wavelength in Balmer series of He is :
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.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.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.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