161. Chromel (Nichrome) is an alloy of Chromium and molybdenum Nickel and chromium Molybdenum and nickel Chromium and aluminium ✅ The correct answer is option B.
162. Which of the following pairs of elements may form an alloy? Iron & carbon Iron & mercury Platinum & mercury None of these ✅ The correct answer is option A.
163. DDT is shipped in Stainless steel containers Paper bags Fibre drums Either B or C ✅ The correct answer is option D.
164. Cast iron detachable joint is used in __________ pipes. Steel Cast iron Asbestos cement Reinforced cement concrete ✅ The correct answer is option A.
165. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with Karbate Lead or glass Fireclay bricks PVC ✅ The correct answer is option B.
166. Which of the following is not an alloy of nickel and chromium? Inconel Hastealloy Nimonic alloys Duralumin ✅ The correct answer is option D.
167. Which of the following has no effect on the carbide forming tendency in steels? Molybdenum Phosphorus Chromium Vanadium ✅ The correct answer is option B.
168. Lead Is the hardest metal in common use Is the lightest metal in common use Can not be scratched by finger nails Can not be work hardened ✅ The correct answer is option D.
169. Among the tin containing alloys, __________ consumes the maximum amount of tin. Solder White metal Pewter matal Bronzes ✅ The correct answer is option A.
170. A metallic alloy in which one of the constituent metal is __________ , is called an amalgam. Zinc Mercury Lead Tin ✅ The correct answer is option B.