Chemistry Diploma Paper Essay

1. Attempt any ten-spot of the following a) Why is an atom electrically neutral ? b) Differentiate among isotopes and isobars. c) narrow conductor and nonconductor. d) State Faradays second law of electrolysis. e) Define cell. Give its classification. f) excuse the equipment casualty mineral and ore. g) Define alloys with suitable example. h) What is nickel note silver ? bring through its composition. i) Give composition of glass-wool. j) Name the types of plastics with examples of each. k) Define gull of sewage. l) Define Air-pollution. Give its magnitude.2. Attempt any quadruplet of the following 16 a) Give the comparison of electron, proton and neutron w.r.to their symbol, change, mass and location within an atom. b) Give tetrad points of distinction between orbit and orbital. c) keep open orbital electronic soma of the following elements 24 39 20 N14 , Mg 12 , K 19 , Ne10 7d) Describe the formation of NaCl molecule with diagram and cause the type of bonding. e) Expla in electrovalency and covalency with example. f) State and explain Faradays prime(prenominal) law of electrolysis. P.T.O.12002*12002* MARKS 3. Attempt any four of the following 16 a) Draw diagram and explain the construction working of lead-acid storage cell. b) A given quantity of electricity is passed through two cells containing copper sulfate and silver nitrate respectively. If 0.99 gms of silver and 0.29 gms of copper are deposited, find analogous weight of silver when that of copper is 31.6. c) Explain the mechanism of electrolysis of fused sodium-chloride by using carbon electrodes. d) Why copper is electro-refined ? Describe the process of electro-refining of copper. e) Explain construction working and application of dry-cell. f) Define metallurgy. Outline the general belief of metallurgy.4. Attempt any four of the following 16 a) Define the terms flux, slag, malleability and toughness. b) spell composition, properties and applications of Alnico and Woods metal. c) Exp lain with diagram the gravity insularism used for concentration of iron-ore. d) Differentiate calcination and roasting. e) Write any four purposes of qualification alloys. f) Explain the fusion method for manufacture of alloys. 5. Attempt any four of the following 16 a) State four properties of plastics and write the uses based on each of given properties. b) What is thermocole ? Give its properties and applications. c) What is rubber ? What is the difference between rude(a) and synthetic rubber ?d) What is green-house-effect ? State the measure to control it. e) Explain the causes of pee pollution. f) What is bio-medical-waste ? Give two techniques for its disposal. 6. Attempt any four of the following a) Write properties and application of glass-wool. b) Explain any four major sources causing air-pollution. c) Write any four methods to control water pollution. d) What is preventive environmental management ? Give one example. e) Distinguish between air-pollution due to veh icle and industries. f) Write short note on effect of E-waste. 16