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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You're on a roll — here are the answers to the questions: 3c) The main ore of Aluminum is Bauxite. 3d) Electrolysis of brine solution is used to produce Chlorine gas, Hydrogen gas, and Sodium hydroxide. 3e) An element with atomic number 17 is a non-metal. It is Chlorine, a reactive non-metal belonging to the halogen group. 3f) Step 1: Calculate the total mass of the mixture. Total mass = Mass of alumina + Mass of cryolite Total mass = 20.0 g + 20.0 g = 40.0 g Step 2: Calculate the percentage of alumina. Percentage of alumina = Mass of aluminaTotal mass × 100\% Percentage of alumina = 20.0 g40.0 g × 100\% Percentage of alumina = 0.5 × 100\% = 50\% 3g) Nitrogen (III) chloride (NCl_3) is a covalent compound and does not typically undergo electrolysis in the same way ionic compounds do, as it does not readily dissociate into ions. If an electrical current were forced through it, decomposition would occur. At the anode, oxidation takes place. In NCl_3, the chlorine atoms are in the -1 oxidation state. If oxidation were to occur, chloride would lose electrons to form chlorine gas. 3h) The Contact Process is an industrial method for the manufacture of Sulfuric acid. The "percentage of Nitrogen" likely refers to the Haber process for ammonia synthesis, where nitrogen gas typically constitutes 25\% of the reactant mixture (1 part N_2 to 3 parts H_2 by moles). 3i) In the reaction 2H_2S + SO_2 → 3S + 2H_2O: The oxidation state of sulfur in H_2S is -2. The oxidation state of sulfur in SO_2 is +4. The oxidation state of sulfur in elemental S is 0. H_2S is oxidized (sulfur goes from -2 to 0), so H_2S is the reducing agent. 3j) The oxidation number of Sulfur in SO_4^2- is: Let the oxidation number of Sulfur be x. x + 4(-2) = -2 x - 8 = -2 x = -2 + 8 x = +6 3k) Which halogen is a gas at room temperature? The correct option is (C) Chlorine. (Iodine is a solid, Bromine is a liquid at room temperature). 3l) The colour in transition metal complexes is due to absorption of specific wavelengths of light, causing d-d electron transitions. Got more? Send 'em!