31. Bakelite is a? A. Insulator B. Semiconductor C. high resistor driver D. low resistor driver Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
32. Cyanide poisoning causes death in seconds because A. it breaks the electron transport chain B. it denatures enzymes of the heart muscle C. it causes cardiac arrest D. it causes lysis of red blood cells Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
33. Which one of the following fibre is made from natural raw materials? A. Rayon B. Nylon C. Polyester D. Polystyrene Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
34. Which of the following is a natural fibre? A. Silk B. Rayon C. Nylon D. Polyester Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
35. Who discovered the rubber making process through the vulcanisation method? A. John Dunlop B. Charles Goodyear C. Macmillan D. Newton Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
36. Bakelite is formed by the condensation of A. Urea and formaldehyde B. Phenol and formaldehyde C. Phenol and acetaldehyde D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
37. Teflon is the common name of A. Polytetrafluoroethylene B. Polyvinyl chloride C. Polyvinyl fluoride D. Dichlorodifluoro methane Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
38. Which of the following hasmagnesium? A. Carbonic anhydrase B. Vitamin B12 C. Chlorophyll D. Haemocyanine Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
39. . . . . . . . . is not a thermoplastic polymer. A. Polyvinyl chloride (PVC) B. Teflon C. Bakelite D. Polystein Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
40. Natural rubber is a polymer of A. Isoprene B. Styrene C. Vinyl acetate D. Propene Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board