BSc Chemistry SEM IV ATKT 2017-18 ATKT CHEMISTRY Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Attempt any four 20 marks
   • A. Describe the moving boundary method for the determination of transport number
   • B. What are liquid crystals? Explain its classification
   • C. Define surface tension and write its important features
   • D. How is surface tension measured with the help of stalagmometer? Explain
   • E. How is viscosity of liquid experimentally determined?
   • F. Define viscosity. What are the factors on which viscosity of liquid depend?
   • G. Water and given liquid takes 100 seconds and 35 seconds respectively to flow between the two marks of an Ostwald's viscosity meter. Calculate the viscosity of liquid, if its density is 0.85 g/cm*. Given the viscosity of water to be 0.0106 pcise and its density to be 0.997 g/cm’
   • H. Write a note on mass defect. Calculate the mass defect of 25U. The mass of U235 is 235.0439
2. Q2 Attempt any four 20 marks
   • A. Discuss calibration curve method used to determine amount of particular component ina
   • B. Explain the system having upper critical solution temperature
   • C. The molar absorptivity coefficient of a solute is 12345 If a solution of the substance has an absorbance of 0.35 in light path cell. Calculate (a) transmittance (b) concentration of solution
   • D. Explain the principle and components of single beam colorimeter with the help of its schematic
   • E. Define the terms: (a) transmittance (b) absorbance (c) law (d) law (e) wavelength of maximum absorption
   • F. Discuss the solutions having positive deviation from Raoult’s law and solutions having negative deviation from Raoult’s law suitable examples
   • G. Distinguish between ideal solution and real solution
   • H. State Gibb’s Phase Rule and explain the meaning of terms involved
3. Q3 Attempt any four
   • A. What do you mean by method Explain with Write a note on operational error
   • C. What are the types of errors? Explain personal e ‘or in deta method
   • D. Write a note on mechanism of adsorption indicators 8.33 Calculate
   • E. For the following observations: 18.32,18,33 di mean deviation from median
   • (a) Range (b) mean (c) median (d) deviation from mean 3 30cm? (c) (d) 90 cm? (e)
   • F. Calculate the molar concentration of Cl ions wh en (a) 20cm (b) late for each 95 cm” of 0.1M AgNO? is added to 100 of 0.1M NaCl. Also calculate pC {Concentration of CI ions =0.1M} 6.22. 6.16, 6.34
   • G. The pH of a solution was determined with the following results: 6.23, 6.28, 6.22, 0.16, 6.34,
   • 6.31, and 6.30. Calculate standard deviation and variance
   • H. The following results were obtained in the replicate analysis of
   • 4.53, 4.55, 4.51, 4.57, 4.52. Calculate standard deviation and variance
4. Q4 Attempt any three 15 marks
   • A. Explain photomultiplier tube as detector with su ble diagram
   • B. Write a short note on instrumental
   • C. Explain the factors affecting stability of
   • D. Give applications of liquid crystals
   • E. (a) Define mean, median and solubitity produ absolute error is and true value is 186, calculate the relative error. We
   • F. Define photometric titration and explain the var us ty, pes titration curves

Read from the scan above, so a character or two may differ. The scan is the original.