Order Chlorine and Hydrogen Assignment 51. A current of 0.10 amp was passed for two hours through a solution of cupra cyanide 0.3745 g of copper was deposited at the cathode. Calculate the volume of hydrogen measured at STP liberated simultaneously. (At wt of Cu = 63.6) (a) 14.46 ml (b) 17.64 ml (c) 16.47 ml (d) 15.22 ml 52. Given (i) Co3 e Co2 […]

Order magnitude of osmotic pressure is large 99. The molar enthalpy of sublimation of solid benzene is 20.21 K J mol1 . Molar heat of fusion = 10.59 kJ mol1 . Calculate Kb for benzene in deg molal1 if boiling point of benzene is 80qC. (a) 8.446 (b) 6.446 (c) 4.648 (d) 5.468 100. Which among the following is not positive for a non ideal […]

Order Chemical Kinetics and Solid State Assignment 1. Decomposition of NH3 gas on heated tungsten surface gave the following data. Calculate the order and the mean value of the rate constant. initial pressure po (in mm Hg) 65 105 150 185 T1/2 (sec) 290 460 670 820 2. Decomposition of N2 O(g) conforms to , order kinetics. The rate constant gets quadrupled over the temperature […]

Order Face centered cubic unit cell 38. A solution of sucrose is hydrolyzed to the extent of 20% after 30 minutes, from the start. After what time will the reaction to be 90% complete? (a) 369.0 min (b) 309.6 min (c) 296.3 min (d) 269.3 min 39. Determine the order of the reaction: (NH4 )CNO(aq) (aq) O C NH2 NH2 given the following data Initial […]

Order Acid catalyzed ester hydrolysis 96. A crystalline substance has molar mass of 75 g mol–1, and it belongs to bcc structure and edge length 500 pm. Its density in g cm–3 is its (a) 5 (b) 2 (c) 3.5 (d) 4.8 97. r = 45 pm in a compound with zinc blende structure. The ideal magnitude of r ” (a) 0.78 Å (b) 0.68 […]

Order Surface Chemistry and Nuclear Chemistry 1. The minimum concentration of an electrolyte required to cause coagulation of a sol is called its flocculation value. It is expressed in millimoles per litre. If the flocculation value of MgSO4 for standard As2 S3 sol is 0.833. How many milligrams of MgSO4 is to be added to 20 mL standard As2 S3 sol so that flocculation just […]

Order Langmuir adsorption isotherm 31. When As2 S3 sol and Fe(OH)3 sol are mixed (a) both become dilute (b) both become more stable (c) both become true solutions (d) mutual coagulation takes place 32. Which of the following is an example of heterogeneous catalysis? (a) Decomposition of H2 O2 solution in presence of KI (b) Lead chamber process for the manufacture of H2 SO4 (c) […]

Order Mole to Mole Conversions Assignment 11.1.1 How many moles of LiOH will be produced if 0.550 mol Li reacts according to the following equation? 2Li(s) 2H2O(l) ⟶ 2LiOH(aq) H2(g) a) 0.550 mol d) 2.20 mol b) 1.10 mol e) 2.00 mol c) 0.275 mol 11.1.2 How many moles of sulfur form from the reaction of 4.00 moles of H2S, according to the equation? (Don’t […]

Order Limitations on Reaction Yield Assignment 11.3.1 What mass of CaSO4 is produced according to the given equation when 5.00 g of each reactant are combined? CaF2(s) H2SO4(aq) ⟶ CaSO4(s) 2HF(g) a) 10.0 g b) 11.6 g c) 6.94 g d) 8.72 g e) 5.02 g 11.3.2 What is the percent yield for a process in which 10.4 g CH3OH reacts and 10.1 g CO2 […]

Order Aqueous Reactions Assignment 11.4.1 What mass of AgCl will be recovered if a solution containing 5.00 g of NaCl is treated with enough AgNO3 to precipitate all the chloride ion? a) 12.3 g d) 9.23 g b) 5.00 g e) 10.0 g c) 3.03 g 11.4.2 A 10.0-g sample of an unknown ionic compound is dissolved, and the solution is treated with enough AgNO3 […]