Chemistry Diploma Paper Essay Example for Free

chemical science Diploma Paper Essay1. Attempt any ten of the interest a) Why is an atom electrically neutral ? b) Differentiate betwixt isotopes and isobars. c) situate conductor and nonconductor. d) fix Faradays second law of electrolysis. e) Define cell. reelect its classification. f) Explain the terms mineral and ore. g) Define alloys with suitable example. h) What is nickel silver grey ? Write its composition. i) Give composition of glass-wool. j) Name the examples of plastics with examples of each. k) Define COD of sewage. l) Define Air-pollution. Give its magnitude.2. Attempt any quaternion 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 four points of distinction between orbit and orbital. c) Write orbital electronic configuration of the following elements 24 39 20 N14 , Mg 12 , K 19 , Ne10 7d) Describe the formation of NaCl molecule with diagram and name the typ e of bonding. e) Explain electrovalency and covalency with example. f) State and explain Faradays first 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(a) of lead-acid storage cell. b) A given quantity of electricity is passed through two 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) Explain the mechanism of electrolysis of coalesced 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 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 an d Woods metal. c) Explain with diagram the gravity separation apply for concentration of iron-ore. d) Differentiate calcination and roasting. e) Write any four purposes of making alloys. f) Explain the fusion method for fiction 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 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 one example. e) Distinguish between air-pollution collectable to vehicle and industries. f) Write short note on effect of E-waste. 16