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Question: Which of the following is a property of heavy water?Options: It is lighter than regular wa..
Question: What is the molecular formula of water?Options: H2OH2O2HOH2Correct Answer: H2OSolution: Th..
Question: What is the main cause of global warming?Options: DeforestationGreenhouse gas emissionsOzo..
Question: Which of the following is a property of lanthanide contraction?Options: Increase in atomic..
Question: What is the common oxidation state of Chromium in chromates?Options: +2+3+4+6Correct Answe..
Question: What type of hybridization occurs in the complex ion [Fe(CN)6]3-?Options: spsp2sp3d2sp3Cor..
Question: What is the oxidation state of phosphorus in H3PO4?Options: +5+30-3Correct Answer: +5Solut..
Question: What is the relationship between enthalpy change and the spontaneity of a reaction?Options..
Question: Which of the following is a real-world application of enthalpy calculations?Options: Desig..
Question: What is the effect of a catalyst on the enthalpy change of a reaction?Options: Increases t..
Question: Which law of thermodynamics states that energy cannot be created or destroyed?Options: Fir..
Question: In a calorimetry experiment, what does a positive q value indicate?Options: Heat is releas..
Question: How does increasing temperature generally affect the enthalpy of a system?Options: It decr..
Question: What is the standard enthalpy of formation (ΔHf°) for an element in its standard state?Opt..
Question: Which of the following processes is an example of an endothermic reaction?Options: Combust..
Question: In a chemical reaction, if the enthalpy change (ΔH) is negative, what does this indicate?O..
Question: What is the primary purpose of using enthalpy in thermodynamics?Options: To measure the te..
Question: What is the enthalpy change for the reaction: N2(g) + 3H2(g) → 2NH3(g) if the standard ent..
Question: What is the standard enthalpy change for the combustion of methane (CH4) if ΔHf for CO2(g)..
Question: What is the enthalpy change (ΔH) for the reaction: 2H2(g) + O2(g) → 2H2O(g) if ΔHf for H2O..
Question: In an isothermal process, which of the following statements is true?Options: The temperatu..
Question: What is the change in enthalpy (ΔH) for the reaction: H2(g) + 1/2 O2(g) → H2O(l) if the st..
Question: A chemical reaction releases 250 J of heat. If the reaction occurs at constant pressure, w..
Question: If the enthalpy change for a reaction is -500 kJ for 5 moles, what is the enthalpy change ..
Question: For a reaction with ΔH = -120 kJ, how much heat is absorbed when 0.25 moles of reactants a..
Question: A process absorbs 300 J of heat and does 100 J of work. What is the change in internal ene..
Question: If the enthalpy change for a reaction is +75 kJ for 2 moles, what is the enthalpy change p..
Question: What is the enthalpy change when 4 moles of a substance release 800 J of heat?Options: 200..
Question: A reaction has an enthalpy change of 200 kJ for the formation of 1 mole of product. What i..
Question: If the enthalpy change (ΔH) for a reaction is -150 kJ and the reaction occurs at constant ..
