MCQOPTIONS
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MCQOPTIONS
This section includes 212 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
_ Pick out the correct statement.$? |
| A. | Reaction of NH‚ÇÉ with HNO‚ÇÉ to produce (NH‚ÇÑ)‚ÇÇNO‚ÇÉ is endothermic |
| B. | With increase in NH‚ÇÉ/CO‚ÇÇ ratio, urea yield decreases for a given temperature, pressure and total feed rate |
| C. | Biuret (an intermediate during urea manufacture) is toxic to seeds and animals |
| D. | Both B and C |
| Answer» C. Biuret (an intermediate during urea manufacture) is toxic to seeds and animals | |
| 102. |
_ Urea is a better fertilizer than ammonium sulphate, because$? |
| A. | It is cheaper |
| B. | Nitrogen content is higher |
| C. | It is not poisonous |
| D. | It is easy to manufacture |
| Answer» C. It is not poisonous | |
| 103. |
_ Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.$? |
| A. | Autocatalytic |
| B. | Endothermic |
| C. | Exothermic |
| D. | Non-catalytic |
| Answer» C. Exothermic | |
| 104. |
_ Low grade phosphate rock can be used in electrical furnace, because$? |
| A. | Of the better CaO/SiO‚ÇÇ balance for slag formation |
| B. | CaO content is less |
| C. | It is cheap |
| D. | It produces low cost product |
| Answer» B. CaO content is less | |
| 105. |
_ Flushing liquor used for cooling coke oven gas constitutes of$? |
| A. | Ammoniacal liquor |
| B. | K‚ÇÇCO‚ÇÉ solution |
| C. | Dilute H‚ÇÇSO‚ÇÑ |
| D. | Dilute HCl |
| Answer» B. K‚Äö√á√áCO‚Äö√á√â solution | |
| 106. |
_ Lower temperature and large excess of ammonia in urea melt$? |
| A. | Increases biuret formation |
| B. | Decreases biuret formation |
| C. | Is undersirable |
| D. | Does not effect biuret formation |
| Answer» C. Is undersirable | |
| 107. |
_ NPK fertiliser is a __________ fertiliser.$? |
| A. | Complex |
| B. | Mixed |
| C. | Nitrogenous |
| D. | Phosphatic |
| Answer» C. Nitrogenous | |
| 108. |
__Fertiliser plants get their N‚ÇÇ requirements__ |
| A. | By fractionation of liquified air |
| B. | By dissociating oxides of nitrogen |
| C. | From coal gas (coke oven gas) |
| D. | From producer gas |
| Answer» B. By dissociating oxides of nitrogen | |
| 109. |
__Triple superphosphate is made by reacting phosphate rock with __________ acid.__ |
| A. | Phosphoric |
| B. | Nitric |
| C. | Sulphuric |
| D. | Hydrochloric |
| Answer» B. Nitric | |
| 110. |
__Temperature and pressure in urea autoclave is__ |
| A. | 120°C and 300 atm |
| B. | 190°C and 200 atm |
| C. | 400°C and 550 atm |
| D. | 200°C and 10 atm |
| Answer» C. 400¬¨‚àûC and 550 atm | |
| 111. |
__Color of nitric acid is light yellow due to the presence of__ |
| A. | NO |
| B. | NO‚ÇÇ |
| C. | N‚ÇÇH‚ÇÖ |
| D. | NH‚ÇÉ |
| Answer» C. N‚Äö√á√áH‚Äö√á√ñ | |
| 112. |
____________ is not a fertiliser.__ |
| A. | Calcium ammonium nitrate |
| B. | Ferrous sulphate |
| C. | Liquid ammonia |
| D. | Ammonium sulphate |
| Answer» C. Liquid ammonia | |
| 113. |
__Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.__ |
| A. | Exothermic |
| B. | Endothermic |
| C. | Autocatalytic |
| D. | Catalytic |
| Answer» C. Autocatalytic | |
| 114. |
__Reaction of dilute sulphuric acid with phosphate rock produces__ |
| A. | Phosphoric acid |
| B. | Superphosphate |
| C. | Triple superphosphate |
| D. | Gypsum |
| Answer» B. Superphosphate | |
| 115. |
__Which of the following fertilisers contains the least percentage of nitrogen?__ |
| A. | Liquid ammonia |
| B. | Urea |
| C. | Ammonium phosphate |
| D. | Ammonium sulphate |
| Answer» D. Ammonium sulphate | |
| 116. |
_Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.$? |
| A. | Nutrient supply |
| B. | Texture |
| C. | Water holding capacity |
| D. | All of the above |
| Answer» E. | |
| 117. |
_Which of the following fertilisers is used as a cattle feed?$? |
| A. | Urea |
| B. | Calcium ammonium nitrate |
| C. | Superphosphate |
| D. | Ammonium sulphate |
| Answer» B. Calcium ammonium nitrate | |
| 118. |
_Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the$? |
| A. | Osmotic pressure of the soil water becomes less than that of the plant sap |
| B. | Soil becomes too alkaline |
| C. | Osmotic pressure of the soil water becomes higher than that of the plant sap |
| D. | Soil becomes too acidic |
| Answer» D. Soil becomes too acidic | |
| 119. |
_Urea is formed only$? |
| A. | In liquid phase |
| B. | In vapour phase |
| C. | At very high temperature |
| D. | At very low pressure (vacuum) |
| Answer» B. In vapour phase | |
| 120. |
_Two gas based fertiliser plants are located in$? |
| A. | Maharashtra and Gujarat |
| B. | Maharashtra and Orissa |
| C. | Gujarat and Madhya Pradesh |
| D. | Jharkhand and Chattisgarh |
| Answer» B. Maharashtra and Orissa | |
| 121. |
_Ammonia synthesis gas is produced from natural gas by$? |
| A. | Thermal cracking |
| B. | Steam reforming |
| C. | Partial oxidation |
| D. | Hydrogenation |
| Answer» C. Partial oxidation | |
| 122. |
_Fertiliser produced during soda ash manufacture by dual process is ammonium$? |
| A. | Chloride |
| B. | Sulphate |
| C. | Nitrate |
| D. | None of these |
| Answer» B. Sulphate | |
| 123. |
_Reaction of __________ acid with phosphate rock produces superphosphates.$? |
| A. | Hydrochloric |
| B. | Sulphuric |
| C. | Nitric |
| D. | Phosphoric |
| Answer» C. Nitric | |
| 124. |
_Low grade coal is __________ to produce ammonia synthesis gas.$? |
| A. | Hydrogenated |
| B. | Liquefied |
| C. | Gasified |
| D. | Dehydrogenated |
| Answer» D. Dehydrogenated | |
| 125. |
_Raw materials for nitric acid manufacture are$? |
| A. | Hydrogen peroxide, air and water |
| B. | Anhydrous ammonia and air |
| C. | Anhydrous ammonia, air and water |
| D. | Wet ammonia, air and water |
| Answer» D. Wet ammonia, air and water | |
| 126. |
_Prilling tower is found in the flowsheet for the manufacture of$? |
| A. | Ammonia |
| B. | Urea |
| C. | Superphosphate |
| D. | Triple superphosphate |
| Answer» C. Superphosphate | |
| 127. |
_Catalytic ammonia synthesis reaction as in Haber's process is$? |
| A. | Endothermic |
| B. | Exothermic |
| C. | Irreversible |
| D. | None of these |
| Answer» C. Irreversible | |
| 128. |
_Action of phosphoric acid on rock phosphate produces$? |
| A. | Superphosphate |
| B. | Triple superphosphate |
| C. | Nitrophosphate |
| D. | Diammonium phosphate |
| Answer» C. Nitrophosphate | |
| 129. |
_Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.$? |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 80 |
| Answer» C. 50 | |
| 130. |
_P‚ÇÇO‚ÇÖ content in superphosphate is about __________ percent.$? |
| A. | 30-35 |
| B. | 15-20 |
| C. | 65-70 |
| D. | 85-90 |
| Answer» C. 65-70 | |
| 131. |
_Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium$? |
| A. | Carbonate |
| B. | Phosphate |
| C. | Bicarbonate |
| D. | Silicate |
| Answer» B. Phosphate | |
| 132. |
_Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in$? |
| A. | Low bulk density product |
| B. | Biuret formation |
| C. | Non-spherical prills |
| D. | Substantially wet non-flowing and sticky product |
| Answer» C. Non-spherical prills | |
| 133. |
_Liquid ammonia is not used as such a fertiliser in tropical countries like India, because$? |
| A. | Its N‚ÇÇ content is very low |
| B. | It is very costly |
| C. | It will evaporate on spraying |
| D. | It is not available |
| Answer» D. It is not available | |
| 134. |
_P‚ÇÇO‚ÇÖ percentage in the phosphoric acid produced by wet process is about$? |
| A. | 10 |
| B. | 30 |
| C. | 50 |
| D. | 70 |
| Answer» C. 50 | |
| 135. |
_Nitrolime is$? |
| A. | Calcium nitrate |
| B. | Calcium ammonium nitrate |
| C. | A mixture of nitric acid and lime |
| D. | A mixture of ammonium nitrate and calcium nitrate |
| Answer» C. A mixture of nitric acid and lime | |
| 136. |
_The essential ingradient of all the synthesis gas is$? |
| A. | H‚ÇÇ |
| B. | O‚ÇÇ |
| C. | CO‚ÇÇ |
| D. | N‚ÇÇ |
| Answer» B. O‚Äö√á√á | |
| 137. |
_Which of the following is a natural inorganic fertiliser?$? |
| A. | Chile salt petre |
| B. | Oilcake |
| C. | Gobar mannure |
| D. | None of these |
| Answer» B. Oilcake | |
| 138. |
Reaction of orthophosphoric acid with soda ash produces$? |
| A. | Sodium tripolyphosphate (STPP) |
| B. | Tricresyl phosphate |
| C. | Tributyl phosphate |
| D. | Nitrophosphate |
| Answer» B. Tricresyl phosphate | |
| 139. |
CO‚ÇÇ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in$? |
| A. | Mono-ethanolamine (MEA) |
| B. | Slaked lime |
| C. | Ammoniacal liquor |
| D. | Methyl-Ethyl Ketone (MEK) |
| Answer» B. Slaked lime | |
| 140. |
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of$? |
| A. | Phosphoric acid |
| B. | Superphosphate |
| C. | Phosphorous |
| D. | Triple superphosphate |
| Answer» D. Triple superphosphate | |
| 141. |
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N‚ÇÇ & H‚ÇÇ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.$? |
| A. | Stabilisation |
| B. | Increasing the effectiveness |
| C. | Improving the strength & heat resistance |
| D. | All of the above |
| Answer» E. | |
| 142. |
Nitrogen content of a nitrogenous fertiliser is 35%. It could be$? |
| A. | Urea |
| B. | Ammonium nitrate |
| C. | Calcium ammonium nitrate (CAN) |
| D. | Ammonium sulphate |
| Answer» C. Calcium ammonium nitrate (CAN) | |
| 143. |
Temperature and pressure in ammonia converter is$? |
| A. | 200 atm, 1000°C |
| B. | 450 atm, 200°C |
| C. | 450 atm, 550°C |
| D. | 450 atm, 1000°C |
| Answer» D. 450 atm, 1000¬¨‚àûC | |
| 144. |
In the manufacture of H‚ÇÉ PO‚ÇÑ (ortho), ; strong H‚ÇÇ SO‚ÇÑ leaching wet process as compared to electric furnace process$? |
| A. | Uses lower grade phosphate rock |
| B. | Requires lower capital investment in the plant |
| C. | Produces lower purity acid |
| D. | Is very costly |
| Answer» D. Is very costly | |
| 145. |
Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)$? |
| A. | Use coal for heating purpose |
| B. | Gasify coal to get hydrogen from coal gas |
| C. | Use coal as filler in fertiliser |
| D. | Use coal as conditioner in fertiliser |
| Answer» C. Use coal as filler in fertiliser | |
| 146. |
Catalyst used in steam reforming of naphtha is$? |
| A. | Nickel |
| B. | Platinum |
| C. | Silica gel |
| D. | Rhodium |
| Answer» B. Platinum | |
| 147. |
Which of the following is not a measure component necessarily to be present in fertilisers?$? |
| A. | Nitrogen |
| B. | Potassium |
| C. | Phosphorous |
| D. | Sulphur |
| Answer» E. | |
| 148. |
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.$? |
| A. | 50-80 |
| B. | 250-400 |
| C. | 1000-1200 |
| D. | 800-900 |
| Answer» C. 1000-1200 | |
| 149. |
Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.$? |
| A. | 5 |
| B. | 20 |
| C. | 50 |
| D. | 65 |
| Answer» C. 50 | |
| 150. |
Pick out the wrong statement.$? |
| A. | Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty |
| B. | Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis |
| C. | Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables |
| D. | Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis |
| Answer» D. Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis | |