JEE & NEETJEE Chemistry 100+ MCQ & Answer JEE Main Chemistry | page-09 | General Knowledge MCQ And Answer February 1, 2025 DSN MARATHI 81. What is a necessary condition for a reaction to be spontaneous at all temperatures? A. 𐤃H < 𐤃G B. 𐤃H = 𐤃G = 0 C. 𐤃G and H should be positive D. 𐤃G and 𐤃H should be negative Answer Option : D 82. Chemical dissociation is _______. A. exothermic B. reversible C. endothermic D. reversible and endothermic Answer Option : D 83. How many unit cells are divided equally in a face-centred cubic lattice? A. 2 B. 4 C. 6 D. 8 Answer Option : C 84. What are the conditions for gas like Carbon monoxide to obey the ideal gas laws? A. low temperature and low pressure B. low temperature and high pressure C. high temperature and low pressure D. high temperature and high pressure Answer Option : C 85. Find the molecular mass of a gas that takes three times more time to effuse as compared to He with the same volume. A. 9 u B. 27 u C. 36 u D. 64 u Answer Option : C 86. The sweetest sugar is _______. A. sucrose B. fructose C. maltose D. glucose Answer Option : B 87. Which of the following sugars does not give positive Seliwanoff’s test? A. Inulin B. Sucrose C. Fructose D. Maltose Answer Option : D 88. Which of the following is not a disaccharide ? A. maltose B. sucrose C. lactose D. galactose Answer Option : D 89. The phenomenon of mutarotation is not exhibited by _______. A. (–) Fructose B. (+) Lactose C. (+) Maltose D. (+) Sucrose Answer Option : D 90. What is the function of a catalyst in a chemical reaction? A. reduces enthalpy of reaction B. decrease rate constant of reaction C. increases activation energy of reaction D. does not affect the equilibrium constant of reaction Answer Option : D
81. What is a necessary condition for a reaction to be spontaneous at all temperatures? A. 𐤃H < 𐤃G B. 𐤃H = 𐤃G = 0 C. 𐤃G and H should be positive D. 𐤃G and 𐤃H should be negative Answer Option : D
82. Chemical dissociation is _______. A. exothermic B. reversible C. endothermic D. reversible and endothermic Answer Option : D
83. How many unit cells are divided equally in a face-centred cubic lattice? A. 2 B. 4 C. 6 D. 8 Answer Option : C
84. What are the conditions for gas like Carbon monoxide to obey the ideal gas laws? A. low temperature and low pressure B. low temperature and high pressure C. high temperature and low pressure D. high temperature and high pressure Answer Option : C
85. Find the molecular mass of a gas that takes three times more time to effuse as compared to He with the same volume. A. 9 u B. 27 u C. 36 u D. 64 u Answer Option : C
87. Which of the following sugars does not give positive Seliwanoff’s test? A. Inulin B. Sucrose C. Fructose D. Maltose Answer Option : D
88. Which of the following is not a disaccharide ? A. maltose B. sucrose C. lactose D. galactose Answer Option : D
89. The phenomenon of mutarotation is not exhibited by _______. A. (–) Fructose B. (+) Lactose C. (+) Maltose D. (+) Sucrose Answer Option : D
90. What is the function of a catalyst in a chemical reaction? A. reduces enthalpy of reaction B. decrease rate constant of reaction C. increases activation energy of reaction D. does not affect the equilibrium constant of reaction Answer Option : D
