MCQOPTIONS
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MCQOPTIONS
This section includes 595 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent. |
| A. | 7-14 and 14-30 |
| B. | 7-14 and 40-50 |
| C. | 14 - 30 and 40-50 |
| D. | 10 - 20 and 40 - 50 |
| Answer» B. 7-14 and 40-50 | |
| 152. |
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine. |
| A. | Chlorine |
| B. | Ammonium chloride |
| C. | Sodium carbonate |
| D. | Sodium bi-carbonate |
| Answer» B. Ammonium chloride | |
| 153. |
Lime and soda ash are added to water to remove |
| A. | bicarbonates & sulphates of calcium and magnesium. |
| B. | undersirable taste and odour. |
| C. | bacteria. |
| D. | its corrosiveness. |
| Answer» B. undersirable taste and odour. | |
| 154. |
Pick out the wrong statement. Iodine value of an oil or fat is |
| A. | the number of grams of iodine taken up by 100 gm of oil or fat. |
| B. | a measure of its unsaturation. |
| C. | helpful in findings its adulteration & its suitability for making soap. |
| D. | independent of the type of oil, whether it is drying or non-drying. |
| Answer» E. | |
| 155. |
Thermoplastic materials |
| A. | do not soften on application of heat. |
| B. | are heavily branched molecules. |
| C. | are solvent insoluble. |
| D. | none of these. |
| Answer» E. | |
| 156. |
Pick out the wrong statement pertaining to nitric acid. |
| A. | About 90% of nitric acid is manufactured by Ostwald's process. |
| B. | It is a strong mono basic acid which reacts with almost all the metals except noble metals. |
| C. | Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2). |
| D. | Arc process of nitric acid manufacture is economical as compared to Ostwald's process. |
| Answer» E. | |
| 157. |
Proximate analysis of coal determines its __________ content. |
| A. | moisture, ash, sulphur & volatile matter |
| B. | moisture & volatile matter |
| C. | moisture, sulphur, nitrogen & fixed carbon |
| D. | none of these |
| Answer» C. moisture, sulphur, nitrogen & fixed carbon | |
| 158. |
Deacon's method is used for the manufacture of |
| A. | glauber's salt |
| B. | common salt |
| C. | chlorine |
| D. | graphite electrode |
| Answer» D. graphite electrode | |
| 159. |
Which of the following is not a product of coal tar distillation ? |
| A. | Anthracene |
| B. | Cresote oil |
| C. | Carbolic oil |
| D. | None of these |
| Answer» E. | |
| 160. |
Addition of calcium oxide to water produces |
| A. | exothermic heat |
| B. | hissing sound |
| C. | slaked lime |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 161. |
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap. |
| A. | hard |
| B. | soft |
| C. | metallic |
| D. | lubricating |
| Answer» C. metallic | |
| 162. |
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.$ |
| A. | 25 |
| B. | 60-70 |
| C. | 150-200 |
| D. | 250-300 |
| Answer» C. 150-200 | |
| 163. |
Main constituent of dolomite is |
| A. | CaCO3 |
| B. | MgCO3 |
| C. | K2CO3 |
| D. | Na2CO3 |
| Answer» C. K2CO3 | |
| 164. |
Hydrochloric acid is also known as |
| A. | oil of vitriol |
| B. | muriatic acid |
| C. | strong organic acid |
| D. | green acid |
| Answer» C. strong organic acid | |
| 165. |
Which of the following is an explosive ? |
| A. | Nitroglycerene |
| B. | Trintrotoluene (TNT) |
| C. | Cellulose nitrate |
| D. | All (a), (b), and (c) |
| Answer» E. | |
| 166. |
Plasticisers are added to paints to |
| A. | make it corrosion resistant. |
| B. | make glossy surface. |
| C. | give elasticity & prevent cracking of the film. |
| D. | increase atmospheric oxidation. |
| Answer» D. increase atmospheric oxidation. | |
| 167. |
Bromine is used in the preparation of |
| A. | fire extinguishing compounds. |
| B. | fire proofing agents. |
| C. | dyes and antiknock compounds. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 168. |
Which of the following is an endothermic reaction ? |
| A. | Absorption of SO3 in 98% H2SO4. |
| B. | C + H2O = CO + H2. |
| C. | Thermal dissociation of iron pyrites. |
| D. | Both (b) and (c). |
| Answer» E. | |
| 169. |
Chloral is used in the manufacture of |
| A. | DDT |
| B. | BHC |
| C. | parathion |
| D. | none of these |
| Answer» B. BHC | |
| 170. |
The most reactive allotropic form of phosphorus is __________ phosphorus. |
| A. | red |
| B. | yellow |
| C. | violet |
| D. | black |
| Answer» C. violet | |
| 171. |
Catalyst used in the hydrogenation of oil is |
| A. | nickel |
| B. | platinum |
| C. | iron |
| D. | alumina |
| Answer» B. platinum | |
| 172. |
Ordinary glass is not a/an |
| A. | amorphous isotropic material. |
| B. | supercooled liquid. |
| C. | material with sharp definite melting point. |
| D. | electrical insulator. |
| Answer» D. electrical insulator. | |
| 173. |
Wet chlorine gas produced during electrolysis of brine is dehydrated by |
| A. | spraying 66° Be H2SO4 counter current to the flow of the gas. |
| B. | passing it through a bed of diatomaceous earth. |
| C. | passing it through a bed of silica gel. |
| D. | none of these. |
| Answer» B. passing it through a bed of diatomaceous earth. | |
| 174. |
Catalytic oxidation of naphthalene produces |
| A. | styrene |
| B. | phenol |
| C. | phthalic anhydride |
| D. | none of these |
| Answer» D. none of these | |
| 175. |
Vegetable oils and fats basically differ in their |
| A. | density ranges |
| B. | physical state |
| C. | chemical composition |
| D. | chemical properties |
| Answer» C. chemical composition | |
| 176. |
Permanent hardness of water is due to the presence of calcium & magnesium |
| A. | bi-carbonates |
| B. | sulphates & chlorides |
| C. | carbonate |
| D. | none of these |
| Answer» C. carbonate | |
| 177. |
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance. |
| A. | flint |
| B. | soda |
| C. | pyrex |
| D. | potash |
| Answer» D. potash | |
| 178. |
Magnesium and calcium __________ cause temporary hardness of water. |
| A. | carbonates |
| B. | bicarbonates |
| C. | phosphates |
| D. | sulphates |
| Answer» C. phosphates | |
| 179. |
Hydrazine is used in water treatment for the removal of |
| A. | colloidal impurities |
| B. | dissolved oxygen |
| C. | turbidity |
| D. | chlorinous taste |
| Answer» C. turbidity | |
| 180. |
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ? |
| A. | Depithing |
| B. | Digestion |
| C. | Bleaching |
| D. | None of these |
| Answer» B. Digestion | |
| 181. |
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed : |
| A. | furnace ‚Üí converter ‚Üí absorber |
| B. | furnace ‚Üí evaporator ‚Üí absorber |
| C. | furnace ‚Üí converter ‚Üí evaporator |
| D. | converter ‚Üí furnace ‚Üí absorber |
| Answer» B. furnace ‚Üí evaporator ‚Üí absorber | |
| 182. |
An alkali metal salt of palmitic acid is known as |
| A. | soap |
| B. | metallic soap |
| C. | detergent |
| D. | alkaloid |
| Answer» C. detergent | |
| 183. |
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants. |
| A. | independent of |
| B. | directly proportional to |
| C. | inversely proportional to |
| D. | proportional to the square of |
| Answer» B. directly proportional to | |
| 184. |
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because |
| A. | SO3 gas is sparingly soluble in water. |
| B. | water forms an acid mist, which is difficult to absorb. |
| C. | the purity of acid is affected. |
| D. | scale formation in the absorber is to be avoided. |
| Answer» C. the purity of acid is affected. | |
| 185. |
Low purity oxygen is used for |
| A. | L.D. steel making. |
| B. | cutting and welding of metals. |
| C. | medicinal purposes. |
| D. | chemical oxidation processes. |
| Answer» E. | |
| 186. |
Which of the following is an yellow pigment ? |
| A. | Titanium dioxide |
| B. | Ferrous sulphate |
| C. | Lead chromates |
| D. | Zinc sulphides |
| Answer» D. Zinc sulphides | |
| 187. |
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace. |
| A. | Bauxite |
| B. | Limestone |
| C. | Quartz |
| D. | Manganese |
| Answer» C. Quartz | |
| 188. |
Enamels |
| A. | give good glossy finish. |
| B. | are same as varnish. |
| C. | are prepared from non-drying oil. |
| D. | do not contain pigment. |
| Answer» B. are same as varnish. | |
| 189. |
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil. |
| A. | emulsification |
| B. | dispersion |
| C. | precipitation |
| D. | wetting |
| Answer» D. wetting | |
| 190. |
Fire clay is __________ refractory material. |
| A. | a basic |
| B. | an acidic |
| C. | a neutral |
| D. | not a |
| Answer» C. a neutral | |
| 191. |
Salt is added in the kettle during soap manufacture to separate |
| A. | soap from lye. |
| B. | glycerine from lye. |
| C. | the metallic soap. |
| D. | the unsaponified fat from soap. |
| Answer» B. glycerine from lye. | |
| 192. |
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate |
| A. | is prone to thermal decomposition. |
| B. | has high water solubility and is unstable. |
| C. | is soluble in ammonium chloride and potassium chloride solution. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 193. |
The catalyst used in the manufacture of DDT is |
| A. | alumina. |
| B. | silica. |
| C. | 20% oleum. |
| D. | aluminium chloride. |
| Answer» D. aluminium chloride. | |
| 194. |
Which of the following is not an antibiotic ? |
| A. | Penicillin |
| B. | Streptomycin |
| C. | Tetracyclin |
| D. | Quinine |
| Answer» E. | |
| 195. |
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. |
| A. | chromium |
| B. | arsenic |
| C. | copper |
| D. | mangnese |
| Answer» D. mangnese | |
| 196. |
Washing soda is chemically represented by |
| A. | Na2CO3 |
| B. | Na2CO3.H2O |
| C. | Na2CO3.10H2O |
| D. | NaHCO3 |
| Answer» D. NaHCO3 | |
| 197. |
CaCl(OCl) is the chemical formula of |
| A. | hypo |
| B. | bleaching powder |
| C. | plaster of paris |
| D. | aqua regia |
| Answer» C. plaster of paris | |
| 198. |
Alcohol percentage in molasses may be around |
| A. | 10 |
| B. | 40 |
| C. | 70 |
| D. | 85 |
| Answer» C. 70 | |
| 199. |
Phenol is mainly used |
| A. | to produce benzene. |
| B. | to produce phenol formaldehyde. |
| C. | to produce polyester resin. |
| D. | as a plasticiser for unsaturated polyster. |
| Answer» C. to produce polyester resin. | |
| 200. |
Oil is a/an |
| A. | mixture of glycerides. |
| B. | mixture of glycerides of fatty acids. |
| C. | solid at normal temperature. |
| D. | ester of alcohols other than glycerine. |
| Answer» C. solid at normal temperature. | |