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You Are On Question Answer Bank SET 2164
108201. What are the components of solder?
Answer: tin and lead
108202. The heating element of an electric heater is made of?
Answer: Nichrome
108203. Photographic films are coated with?
Answer: Silver Bromide
108204. Artificial rain is done by using?
Answer: Silver iodide
108205. Compound which has the smell of rotten fish?
Answer: Phosphine
108206. Coral reefs are made of?
Answer: Calcium carbonate
108207. Compound used in tear gas?
Answer: Benzyl chloride
108208. Compound used as airpurifier in submarines?
Answer: Sodium peroxide
108209. Which is considered to be an anomalous compound?
Answer: Water
108210. Which chemical compound may be used as a fuel for driving vehicles?
Answer: Ethanol
108211. What is common salt?
Answer: Sodium chloride
108212. Chemical reaction in which heat is evolved?
Answer: Exothermic reaction
108213. What is caustic soda?
Answer: Sodium hydroxide
108214. What is Quick lime?
Answer: Calcium oxide
108215. Which calcium compound is used to remove ice from roads in cold countries?
Answer: Calcium chloride
108216. Which metal salt gives lilac colour to the flame?
Answer: Potassium
108217. Which compound of sodium is used to separate soap from glycerine?
Answer: Sodium chloride
108218. What is the difference between lime and limestone?
Answer: Lime is calcium oxide; Limestone is calcium carbonate
108219. What is the difference between quick lime and slaked lime?
Answer: Quick lime is calcium oxide and slaked lime is calcium hydroxide
108220. Soda lime is a mixture of?
Answer: Calciumoxide and Sodium hydroxide (Quicklime and caustic soda)
108221. What is the main constituent of bones?
Answer: Calcium phosphate
108222. The scales formed inside the boilers are chemically?
Answer: Calcium carbonate
108223. What is obtained when gypsum is heated to 125°C?
Answer: Plaster of paris
108224. The suspension of calcium hydroxide in water is called?
Answer: Milk of lime or slaked lime
108225. Name the calcium compound which is used as filler in paper industry?
Answer: Gypsum
108226. Which calcium compound is used to make toothpaste?
Answer: Calcium carbonate
108227. When sodium burns; what is the colour of the flame?
Answer: Golden yellow
108228. Which sodium compound is used in fire extinguisher?
Answer: Sodium bicarbonate
108229. Which is the smallest atom among the halogens?
Answer: Fluorine
108230. The iodine compound used for dressing of wounds?
Answer: Iodoform (CHl3)
108231. What is the commercial name of sodium nitrate?
Answer: Chile salt petre
108232. Name a substance which is used as mordant?
Answer: Alum
108233. What is the chemical name of Emerald?
Answer: Beryllium aluminium sillicate
108234. Which is the artificial form of aluminium oxide used for making refractory crucibles?
Answer: Alundum
108235. Which form of aluminium oxide is hard as diamond?
Answer: Corundum
108236. What is the colour of copper sulphate?
Answer: Blue
108237. What is the chemical name of verdigris?
Answer: Basic copper carbonate or basic copper acetate
108238. The copper compound used for preserving timber and hides is?
Answer: Copper sulphate
108239. Which chemical is used for rat poison?
Answer: Zinc phosphide
108240. What is the chemical name for marble?
Answer: Calcium carbonate
108241. Which salt is used in making ink?
Answer: Ferrous sulphate
108242. Which chemical is used in a refrigerator for cooling purposes?
Answer: Freon
108243. What is the chemical name for blue vitriol?
Answer: Copper sulphate
108244. What is the chemical name of calamine?
Answer: Zinc carbonate
108245. Which chemical is used by weavers for moisturing thread?
Answer: Anhydrous calcium chloride
108246. What is the chemical name of baking soda?
Answer: Sodium bicarbonate
108247. What is an Epsom salt?
Answer: Magnesium sulphate
108248. What is the name for the greenblue coating that forms naturally on copper; bronze and brass?
Answer: Verdigris
108249. What is P.V.C.?
Answer: Poly Vinyl Chloride
108250. What is the chemical name for saltpetre?
Answer: Potassium Nitrate
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