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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?
Answer: Uranium
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?
Answer: Equilibrium
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?
Answer: 4°C
111217. A rain coat is made of?
Answer: Polychloroethene
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?
Answer: Caffeine
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?
Answer: Astatine
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?
Answer: Allotropy
111228. Substances used for removing excess of chlorine from textiles after their bleaching are in general called?
Answer: Antichlor
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?
Answer: Garlic
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?
Answer: Red
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?
Answer: Chlorine
111239. Write the name of a liquid in which phosphorous dissolves:?
Answer: Carbondisulphide
111240. Which element is used as a disinfectant; as a bleaching agent and to purify water?
Answer: Chlorine
111241. What is the common name for sodium chloride?
Answer: Salt
111242. An enzyme which helps in digestion is?
Answer: Protease
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?
Answer: Potassium
111246. Which gas turns litmus colourless?
Answer: Chlorine
111247. What is the common name for hydrogen hydroxide?
Answer: Water
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?
Answer: Electrolytes
111250. The atoms or groups of atoms that carry electrical charge are called?
Answer: Ions
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