E.S./ 11
12/ E.S.
117. By fixation of nitrogen is meant—
(a) manufacture of nitrogen (b) liquefication of nitrogen
(c) conversion of nitrogen into nitric acid (d) conversion of atmospheric nitrogen into
useful compounds
(e) mixing of nitrogen with other elements 118. Whitephosphorous is generally kept under—
(a) alcohol (b) water
(d) glycerine (d) kerosene oil (e) ether
119. The bell metal is an alloy of—
(a) nickel and copper (b) zinc and copper (c) tin and copper (d) tin and aluminium (e) brass and nickel
120. Which of the following is amorphous ? (a) glass (b) sodium chloride (c) powdered marble (d) cane sugar (e) none of these
121. Carbohydrates are the compounds of—
(a) Carbon and hydrogen
(b) Carbon, oxygen and hydrogen
(c) Carbon, oxygen, hydrogen and nitrogen (d) Carbon, nitrogen and hydrogen
(e) none of these
122. A solution containing one mole of a solute dissolved in 1000g. of solvent is—
(a) a normal solution (b) a molal solution (c) a molar solution (d) an unsaturated solution (e) a saturated solution
123. The manufacture of iron from iron ore involves the process of—
(a) oxidation (b) reduction
(c) fractional distillation (d) electrolysis
(e) none of the above
124. Iron obtained from blast furnace is—
(a) mild steel (b) pig iron (c) structural steel (d) wrought iron (e) none of the above
125. Theoxidationstateofmanganese inK2MnO4 is—
(a) + 7 (b) + 9
(c) + 4 (d) + 5
(e) + 6
126. Hydrogen is liberated from nitric acid by the action of—
(a) Nickel (b) Mercury (c) Magnesium (d) Copper
(e) Potassium chloronate
127. The most abundant element in the earth’s crust is—
(a) O (b) Al
(c) Si (d) Fe
(e) N
128. Which one of the following is used as fuel ?
(a) CO2 (b) CH4
(c) CH3OH (d) CH3COOH (e) SO2
129. Which of the following has the strongest bleaching property ?
(a) Chlorine (b) Fluorine (c) Bromine (d) Iodine (e) Lithium
130. Which gas is used in the preparation of Soda water ?
(a) Carbonmonoxide (b) Carbon (c) Sulphur (d) Chlorine (e) Carbon dioxide
131. The compound having the molecular formula C2H4O2 is an—
(a) acid (b) aldehyde
(c) alkali (d) ether
(e) ketone
132. Sulphur dioxide bleaches colouring matter by—
(a) reduction (b) oxidation (c) dehydration (d) decomposition (e) none of these
133. Nitric acid does not react with—
(a) copper (b) gold
(c) silver (d) zinc
(e) iron
E.S./ 13 134. Silver halides are used in photographic plates
because they are—
(a) oxidised in air (b) colourless
(c) easily soluble in hypo solution (d) readily reduced by light (e) none of the above
135. Oxygen is manufactured by the fractional evaporation of—
(a) water (b) liquid air
(c) hydrogen peroxide (d) liquid oxygen (e) none of the above
136. Calcination is the process of—
(a) heating the ore in an oxidising atmosphere (b) heating the ore in a reducing atmosphere (c) heating the ore in the absence air (d) heating the ore in the presence of air (e) extraction of metal from the ore 137. Sodium burns in air to give—
(a) Sodium peroxide (b) Sodium hydroxide (c) Sodium monoxide
(d) Sodium oxide and sodium nitride
138. Cooling of the molten glass is technically known as—
(a) soldering (b) moulding (c) tampering (d) cooling (e) annealing
139. The compound which can be used to prepare iodoform is—
(a) acetic acid (b) methyl iodide (c) acetone (d) propionaldehyde (e) oxalic acid
140. Brass is an alloy of—
(a) copper and zinc (b) copper and aluminium (c) zinc and aluminium (d) manganese and copper (e) aluminium and manganese 141. Dry ice is—
(a) ice which never melts
(b) a term used for insensitive persons
(c) solid carbon dioxide (d) forzen heavy water (e) none of these 142. Milk is an example of—
(a) suspension (b) emulsion
(c) gel (d) foam
(e) colloidal
143. During burning of fuels, carbon and hydrogen present in the fuels are—
(a) converted into carbon dioxide and water vapour
(b) released into the atmosphere (c) absorbed by the surroundings (d) converted into alkanes (e) reduced
144. Which of the following states Avogadro’s law?
(a) The pressure of a fixed mass of a gas at constant temperature is inversely pro-portional to its volume
(b) At a constant temperature and pressure, the rate of diffusion of a gas is inversely pro-portional to the square root of its density (c) Equal volumes of all gases under similar
conditions of temperature and pressure contain equal numbers of molecules (d) The production of specific heat and
ato-mic weight of a solid element is constant (approximately 6·4)
(e) None of these
145. If two liquids have widely different boiling points, they may be separated by—
(a) steam distillation (b) decantation (c) evaporation
(d) fractional distillation (e) sublimation
146. The aim of galvanising the iron is to—
(a) give it to better look (b) protect it from rusting (c) increase its hardness (d) make it more elastic (e) make it stronger
147. Formaldehyde is the starting material for the manufacture of—
14/ E.S.
(a) D.D.T. (b) rayon
(c) bakelite (d) caprolactam (e) nylon
148. Which of the following elements is not radioactive ?
(a) uranium (b) radium
(c) Zirconium (d) plutonium (e) thorium
149. Which of the following substance can act as both oxidising and reducing agent ?
(a) HNO3 (b) KMnO4
(c) H2O2 (d) K2Cr2O7 (e) H2SO4
150. Which of the following may correctly be called a ‘Colligative property’ ?
(a) half-life of a radioactive element (b) surface tension of a solution (c) conductance of solution (d) osmotic pressure of a solution (e) vapour pressure of a liquid 151. Argon gas was discovered by—
(a) William Ramsay (b) Charles (c) Cavendish (d) John Davy (e) Alfred Werner
152. Gelatin is used as ingredient in the manufacture of ice-cream. This is due to—
(a) to stablise the colloid and prevent crystal formation
(b) to prevent the formation of colloid (c) to give colour to the colloid (d) to give flavour to the colloid (e) to give taste
153. The phenomenon of ‘metamerism’ is shown by—
(a) acetone and propionaldehye
(b) methyl propylether and diethyl ether (c) ethyl alcohol and dimethyl ether (d) propionic acid and acetic acid (e) oxalic acid and lactic acid
154. The metal used in storage batteries is—
(a) tin (b) copper
(c) lead (d) nickel
(e) zinc
155. What is laughing gas ? (a) carbon dioxide
(b) sulphur dioxide (c) nitrous oxide (d) hydrogen peroxide (e) carbon monoxide
156. Molecular weight of a substance is—
(a) only a number (b) expressed in mesons (c) expressed in microns (d) expressed in grams (e) expressed in miligrams
157. At constant temperature the rate of a chemical reaction—
(a) is equal to the product of active masses (b) is inversely proportional to the product of
active masses
(c) is directly proportional to the product of active masses
(d) has no relation to the product of active masses
158. The crystalline substance that changes into liquidonexposuretomoistairissaidtobe—
(a) Effervescent (b) Eflorescent (c) Deliquescent (d) Volatile (e) Non-hydroscopic
159. Which one of the following gases is most soluble in water ?
(a) NO (b) SO2
(c) Cl (d) CO2
(e) NH3
160. Which of the following methods is not used in making hard water soft ?
(a) boiling method (b) adding washing soda (c) permutit process (d) demineralization (e) chlorinating
161. Who gave the theory of ionization?
(a) Faraday (b) Arrhenius (c) Rutherford (d) Cavendish (e) Charles
162. Which of the following is used for plastering of the fractured bones ?
(a) white cement (b) zinc sulphate (c) zinc oxide (d) white lead (e) plaster of Paris
E.S./ 15 163. Oxygen may be prepared by the action of water
on—
(a) oxides (b) sub-oxides (c) peroxides (d) compound oxides (e) mercury
164. Temporary hardness of water is due to the presence of—
(a) nitrates of calcium and magnesium (b) chlorides of calcium and magnesium (c) bicarbonates of calcium and magnesium (d) sulphates of calcium and magnesium (e) sulphates of potassium and magnesium 165. Which of the following does not contain a
hydrophobic structure ?
(a) rubber (b) glycogen
(c) lanolin (d) linseed oil (e) nylon
166. Substances which do not react with cold water but which do react with steam are—
(a) iron, aluminium, chlorine (b) carbon, iron, magnesium (c) carbon, calcium, sulphur dioxide (d) carbon, dioxide, sodium, magnesium 167. Aqua regia ia a mixture of—
(a) one volume of hydrochloric acid and three volumes of nitric acid
(b) equal volumes of hydrochloric and nitric acid
(c) one volume of hydrochloric acid and two volumes of nitric acid
(d) three volumes of hydrochloric acid and one volume of nitric acid
(e) two volumes of hydrochloric acid and three volumes of nitric acid
168. What would you observe if you add, with shaking, excess of dilute NaOH solution to an aqueous solution of aluminium chloride ? (a) a white precipitate which dissolves in
excess NaOH
(b) a permanent white precipitate is formed immediately
(c) a green precipitate forms which turns red on standing in air
(d) no change is noted at first; a white preci-pitate is formed on standing
(e) none of these is formed
169. The substances which can be used for remov-ing nitrogen from air is—
(a) Magnesium (b) Phosphorous (c) Calcium Chloride (d) Lime water (e) None of these
170. Sulphuric acid can be differentiated from sulphurous acid by the addition of—
(a) ferric chloride solution (b) magnesium power (c) litmus solution
(d) sodium carbonate solution (e) sodium chloride solution
171. Which one of the following is not soluble in water ?
(a) Lead sulphate (b) Zinc sulphate (c) Calcium sulphate (d) Sodium sulphate (e) None of these
172. Which one of the following forms of phos-phorous is most reactive ?
(a) black phosphorous (b) white phosphorous (c) violet phosphorous (d) red phosphorous
173. When water vapour is passed over red hot iron—
(a) nothing happens
(b) oxygen and Fe(OH)2 are produced (c) hydrogen and Fe2O3 are produced (d) hydrogen and Fe3O4 are produced (e) hydrogen and Fe2O5 are produced
174. Heavy water (Deuterium) is usually prepared from—
(a) heavy hydrogen (b) rain water only (c) sea water only (d) river water only (e) ordinary water
175. Which one of the metals is the best conductor of electricity and heat ?
(a) Silver (b) Potassium
(c) Copper (d) Sodium
(e) Aluminium
16/ E.S.
176. German silver is an alloy—
(a) of silver and copper (b) of silver and aluminium (c) of copper, zinc and nickel (d) of nickel and aluminium (e) that was first made in Germany
177. Which is the heaviest among the following ?
(a) Gold (b) Silver
(c) Iron (d) Copper
(e) Brass
178. Which one of the following is known as caustic soda ?
(a) Na3P (b) Na2CO3
(c) Ba(OH)2 (d) NaOH
(e) NaHCO3
179. Rusting of iron is due to formation of—
(a) ferric hydroxide (b) hydrated ferrous oxide (c) hydrated ferric oxide (d) ferrous oxide (e) none of these
180. An extremely acid resistant alloy is—
(a) brass (b) magnesium
(c) ferro silicon (d) German silver (e) ferrous sulphate
181. Highly electro positive metals are best pro-duced by—
(a) electrolytic methods
(b) reduction with carbon of their oxides (c) straight thermal decomposition of salts (d) reduction with hydrogen of their halides (e) none of these
182. Sugar are converted in the liver into—
(a) ptyalin (b) glycogen
(c) carbon dioxide and water (d) monosaccharides (e) glucose
183. Which one of the following Vitamins contains nitrogen ?
(a) Vitamin A (b) Vitamin B (c) Vitamin C (d) Vitamin D (e) Vitamin K
184. Which of the following substance can be used as antipyretic ?
(a) Morphine (b) Barbituric acid (c) Paracetamol (d) Benzedrene (e) Cocain
185. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is—
(a) Neon (b) Krypton
(c) Argon (d) Helium
(e) Xenon
186. The principal mineral in marble is—
(a) Carbon (b) Sodium
(c) Iodine (d) Calcite Crystal (e) Chalk
187. Alkali metals are usually kept under—
(a) Petrol
(b) Absolute alcohol (c) Carbon tetrachloride (d) Kerosene
(e) Water
188. Which of the following is the sweetest ? (a) sucrose (b) maltose (c) glucose (d) fructose (e) saccharin
189. A bundle of energy is known as—
(a) joules (b) photon
(c) joules/photon (d) quantum (e) calories per quantum
190. Mostly nuclear reactions are caused by—
(a) positrons (b) mesons (c) neutrons (d) protons only (e) charged particles
191. Purity of butter is determined in terms of—
(a) Acetyl value
(b) Reichert-Miessal Value (c) Iodine Value
(d) Saponification Value (e) Hydrogenation Value
192. Which of the following is used to measure the configurations of sugars ?
(a) Threose (b) Glyceraldehyde
(c) Glucose (d) Ribose
(e) Pentose
E.S./ 17 193. Number of optical isomers in which sugar can
exist—
(a) 8 (b) 4
(c) 16 (d) 32
(e) 64
194. Carbohydrates respond to—
(a) Molish’s test (b) Marsh test (c) Iodoform test (d) Furfural test (e) Luca’s test
195. Sodium metal reacts with—
(a) Ethanol (b) Ethyl ether (c) Acetone (d) Propene (e) Alkyl halide
196. An alcohol on oxidation first yield aldehyde which on further oxidation yield carboxylic acid,bothcontainingsamenumberofcarbon atoms as the alcohol, the alcohol is—
(a) Primary alcohol (b) Polyhydric alcohol (c) Tertiary alcohol (d) Secondary alcohol (e) None of the above
197. Ethyl alcohol can be differentiated from methyl alcohol chemically by—
(a) Victor Meyer’s test (b) Idoform test (c) Luca’s test (d) Oxidation product (e) Furfural test
198. Ethylene oxide on hydrolysis yield—
(a) Ethyl alcohol (b) Ethylene glycol (c) Ethanol (d) Acetone (e) None of these
199. Which of the following find use in the manu-facture of candle ?
(a) Bees wax (b) Spermaceti wax (c) Lanodin wax (d) Paraffin wax (e) All of these
200. Wood spirit is—
(a) Methyl alcohol (b) Ethyl alcohol (c) Butyl alcohol (d) Propyl alcohol (e) Isopropyl alcohol