You Are On Question Answer Bank SET 2224
111201. Who put forward a principle relating to the equilibrium system?
Answer: Le Chatellier
111202. Radiocarbon dating was developed by?
Answer: Willard F. Libby
111203. Radioactivity is measured by using the instrument?
Answer: Geiger counter
111204. Isotope used for the treatment of Hyperthyroidism?
Answer: Iodine 131
111205. The Radioactive element present in Pitch Blende?
111206. Half life period of Carbon 14?
Answer: 5730 years
111207. Half life period of thorium 234?
Answer: 24 days
111208. Rays which travels in the speed of light?
Answer: Gamma rays
111209. The steady state from which no spontaneous change takes place is called?
111210. The chemical reactions which never go to completion are called?
Answer: Reversible reactions
111211. The reaction in which the forward and backward reactions occur simultaneously is called?
Answer: Reversible reaction
111212. Those reactions in which the products cannot react and give back the original reactants are called?
Answer: Irreversible reactions
111213. The temperature most suited for conducting an industrial process involving a reversible reactions; most conveniently and profitably is called?
Answer: Optimum temperature
111214. The reaction in which product molecules react and give back the original reactants is called?
Answer: Backward reaction
111215. A system of reacting substances from which neither the reactants nor the products are taken away or added to is called?
Answer: Closed system
111216. At what temperature water has the maximum density?
111217. A rain coat is made of?
111218. The absence of cobalt in minute quantities in human body causes?
Answer: Pernicious anaemia
111219. Which material is used in display devices; such as digital watches?
Answer: Liquid crystal
111220. Which drug is present in cola drinks?
111221. What is the modern standard for relative atomic mass?
Answer: Carbon isotope with mass number 12
111222. What happens when an electron moves nearer to the nucleus of the atom?
Answer: Its energy decreases
111223. What is molarity?
Answer: Number of moles of solute in one litre of the solution.
111224. What do you mean by a buffer solution?
Answer: Solution which can maintain constant PH
111225. Which halogen is highly metallic in character?
111226. Which gas has the smell of rotten eggs?
Answer: Hydrogen sulphide
111227. The phenomenon by which the same element exists in the same physical state in different forms is known as?
111228. Substances used for removing excess of chlorine from textiles after their bleaching are in general called?
111229. The substances which are capable of absorbing combined water or elements of water from molecules of compounds are called?
Answer: Dehydrating agent
111230. The substances which are capable of removing water vapour from other substances are called?
Answer: Drying agents
111231. Smell of white phosphorus?
111232. What is the acid present in milk?
Answer: Lactic acid
111233. What is the colour of chlorine?
Answer: Greenish yellow
111234. What is the colour of ruby?
111235. Which mineral is known as ‘fool’s gold’?
Answer: Iron pyrites
111236. The iron obtained direct from the blast furnace is called?
Answer: Pig iron
111237. What is agate?
Answer: Naturally occuring silica
111238. Which is the germicidal component in bleaching powder?
111239. Write the name of a liquid in which phosphorous dissolves:?
111240. Which element is used as a disinfectant; as a bleaching agent and to purify water?
111241. What is the common name for sodium chloride?
111242. An enzyme which helps in digestion is?
111243. What do you understand by 22 carat gold?
Answer: 22 parts gold; 2 parts copper
111244. What is sublimation?
Answer: Converting a solid directly into its vapour
111245. The ashes of plants contain alkali metals; 90% of which is?
111246. Which gas turns litmus colourless?
111247. What is the common name for hydrogen hydroxide?
111248. Who is known as the “Father of Polymer Science?
Answer: The German scientist Herman Staudinger
111249. The substances which conduct electricity with the help of the ions present in them are called?
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111250. The atoms or groups of atoms that carry electrical charge are called?
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