iii 3 4 5 6 7 181 9 10 The total charge coulombs required

Last updated: 6/30/2023

iii 3 4 5 6 7 181 9 10 The total charge coulombs required for complete electrolysis is A 24125 B 48250 C 96500 D 193000 A student performs a titration with different burettes and finds titre values of 25 2 mL 25 25 mL and 25 0 mL The number of significant figures in the average titre value is JEE 2010 3 163 Reaction of Br with Na CO3 in aqueous solution gives sodium bromide and sodium bromate with evolution of CO gas The number of sodium bromide molecules involved in the balanced chemical JEE 2011 4 180 equation is JEE 2007 4 162 Dissolving 120 g of urea mol wt 60 in 1000 g of water gave a solution of density 1 15 g mL The JEE 2011 3 160 molarity of the solution is A 1 78 M B 2 00 M C 2 05 M D 2 22 M 29 2 w w HCI stock solution has a density of 1 25 g mL The molecular weight of HCI is 36 5 g mol The volume mL of stock solution required to prepare a 200 mL solution of 0 4 M HCl is JEE 2012 4 136 For the reaction I CIO3 H SO4C HSO4 1 The correct statement s in the balanced equation is are A Stoichiometric coefficient of HSO is 6 B lodide is oxidized C Sulphur is reduced D H O is one of the products JEE Advanced 2014 3 120 A compound H X with molar weight of 80 g is dissolved in a solvent having density of 0 4 g ml Assuming no change in volume upon dissolution the molality of a 3 2 molar solution is JEE Advanced 2014 3 120 and solvent The mole fraction of a solute in a solution is 0 1 At 298 K molarity of this solution is the same as its molality Density of this solution at 298 K is 2 0 g cm The ratio of the molecular weights of the solute MWsolute MW solvent JEE Advanced 2016 3 124 is The order of the oxidation state of the phosphorus atom in H PO2 H3PO4 H3PO3 and H4P O6 is JEE Advanced 2017 3 122 B H3PO4 H4P206 H3PO3 H PO2 D H3PO3 H PO2 H3PO4 H P O6 A H3PO4 H3PO2 H3PO3 H4P2O6 C H PO H3PO3 H4P2O6 H3PO4 PART II JEE MAIN AIEEE PROBLEMS PREVIOUS YEARS m are present in