Chemistry Diploma Paper Essay

1. Attempt all ten of the following a) why is an atom electrically neutral ? b) Differentiate amidst isotopes and isobars. c) Define conductor and nonconductor. d) State Faradays second law of electrolysis. e) Define cell. crack its classification. f) apologise the terms mineral and ore. g) Define alloys with suitable example. h) What is nickel ash gray ? compose its composition. i) Give composition of glass-wool. j) Name the types of plastics with examples of each. k) Define COD of sewage. l) Define Air-pollution. Give its magnitude.2. Attempt any quad of the following 16 a) Give the similitude of electron, proton and neutron w.r.to their symbol, change, mass and location within an atom. b) Give four points of distinction between orbit and orbital. c) drop a line orbital electronic configuration of the following elements 24 39 20 N14 , Mg 12 , K 19 , Ne10 7d) Describe the formation of NaCl molecule with plat and name the type of bonding. e) rationalise electrovalency and covalency with example. f) State and explain Faradays first law of electrolysis. P.T.O.12002*12002* tag 3. Attempt any four of the following 16 a) Draw diagram and explain the construction works of lead-acid storage cell. b) A minded(p) meter of electricity is passed through 2 cells containing copper sulphate and silver nitrate respectively. If 0.99 gms of silver and 0.29 gms of copper are deposited, find equivalent weight of silver when that of copper is 31.6. c) pardon the mechanism of electrolysis of fused sodium-chloride by using carbon copy 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 principle of metallurgy.4. Attempt any four of the following 16 a) Define the terms flux, slag, malleability and toughness. b) Write composition, properties and applications of Alnico and Woods metal. c) Explain with diagram the gravi ty separation used for tightfistedness of iron-ore. d) Differentiate calcination and roasting. e) Write any four purposes of making alloys. f) Explain the merger 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 good-for-naught ? What is the difference between natural and synthetic rubber ?d) What is green-house-effect ? State the measure to control it. e) Explain the causes of water 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 angiotensin converting enzyme example. e) Distinguish between air-pollution due to vehicle and industries. f) Write short personal line of credit on effect of E-waste. 16