Energy is released in one of the following reactions.1. Decomposition reactions2. Endothermic reactions3. Exothermic reactions4. None of these
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Plants synthesise one of the following during photosynthesis.1. Hydrogen2. Chlorophyl3. Water vapour4. Starch
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Formation of nitric oxide is an example for1. endothermic reaction2. exothermic reaction3. both (1) and (2)4. none of these
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Formation of ammonia is an example of1. endothermic reaction2. exothermic reaction3. both (1) and (2)4. none of these
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The bond energy required to break one mole of HCl is1. 103 kcal2. 104 kcal3. 44 kcal4. 300 kcal
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An example for naturally occurring endothermic reaction is1. respiration2. electrolysis of water3. photosynthesis4. none of these
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The energy required in breaking a mole of H-H bond is1. 104 kcal2.62 kcal3.57.8 kcal4. 10.3 kcal
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Internal energy of a substance depends on1. number of atoms present in a molecule2. number of molecules present in a substance3. chemical structure and physical state4. none of these