This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Hey, good to see you again. 41. What will be observed at the anode as electrolysis proceeds? During electrolysis, oxidation occurs at the anode. If the anode itself is made of an active metal, it will be oxidized and dissolve into the electrolyte, causing its size to decrease. The correct option is C. C) The anode will decrease in size 42. Sodium hydroxide is deliquescent. Describe what will be observed if NaOH pellets are exposed to air? Deliquescent substances absorb moisture from the air until they dissolve and form a solution. The correct option is A. A) They form a solution 43. The function of limestone in the extraction of iron is to remove Limestone (calcium carbonate) acts as a flux in the blast furnace. It decomposes to calcium oxide, which then reacts with acidic impurities like silica (SiO_2) to form slag, which is easily removed. The correct option is B. B) Earth impurities 44. Charles' law can be represented mathematically as; Charles's Law states that for a fixed mass of gas at constant pressure, the volume (V) is directly proportional to its absolute temperature (T). The correct option is C. C) V T 45. Which of the following is a difference between soaps and detergents? Soaps are generally biodegradable, meaning they can be broken down by microorganisms. Many older detergents were non-biodegradable, though modern detergents are often designed to be biodegradable. Soaps also form scum in hard water, while detergents do not. The correct option is A. A) Soaps are biodegradable while detergents are non-biodegradable 46. State the three main steps in preparing a standard solution. The main steps involve accurately measuring the solute, dissolving it, and then transferring it to a volumetric flask for dilution to a specific volume. The correct option is D. D) Weigh, Dissolve, Transfer 47. The choice of an indicator used during an acid-base titration depends on The indicator chosen for an acid-base titration must have a color change range that corresponds to the pH at the equivalence point of the specific titration. The pH at the equivalence point is determined by the strengths of the acid and base being titrated. The correct option is A. A) The strength of the acid or base used 48. The following reaction represents the industrial production of ammonia N_2(g) + 3H_2(g) 2NH_3(g) H = -92 kJ/mol If the temperature is increased, the equilibrium position will; The reaction is exothermic ( H is negative). According to Le Chatelier's Principle, if the temperature is increased, the equilibrium will shift in the endothermic direction to absorb the added heat. The reverse reaction (decomposition of ammonia) is endothermic. The correct option is C. C) Shift to the left 49. A compound contains 85.7% C and 14.3% H only. Determine its empirical formula Step 1: Assume a 100 g sample. Mass of C = 85.7 g Mass of H = 14.3 g Step 2: Convert mass to moles using molar masses (C = 12.01 g/mol, H = 1.008 g/mol). Moles of C = 85.7 g12.01 g/mol ≈ 7.136 mol Moles of H = 14.3 g1.008 g/mol ≈ 14.186 mol Step 3: Divide by the smallest number of moles to find the simplest mole ratio. Ratio for C = 7.136 mol7.136 mol = 1 Ratio for H = 14.186 mol7.136 mol ≈ 1.988 ≈ 2 Step 4: Write the empirical formula. The empirical formula is CH_2. The correct option is B. B) CH_2 50. Which of the following is a green house gas? Greenhouse gases are atmospheric gases that absorb and emit infrared radiation, trapping heat in the Earth's atmosphere. Carbon dioxide is a major greenhouse gas. The correct option is B. B) Carbon dioxide Send me the next one 📸