chemical engineering fertilizer technology MCQs – Page 9

Practise multiple-choice questions from chemical engineering fertilizer technology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering fertilizer technology Mcqs
161. Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction?
comments icon0

A. Exothermic

B. Catalytic

C. Endothermic

D. Autocatalytic

162. Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?
comments icon0

A. CAN

B. Ammonium sulphate

C. Superphosphate

D. Urea

163. Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?
comments icon0

A. 50

B. 65

C. 20

D. 5

164. Pick out the wrong statement?
comments icon0

A. Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e.

B. Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F,

C. er water

D. o nitrogen compound form

E. OH)

F. Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported

165. Catalyst used in Habers process for ammonia production is_________________?
comments icon0

A. Nickel

B. Vanadium pentoxide

C. Silica gel

D. Reduced iron oxide
166. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550C), because at low temperature___________________?
comments icon0

A. Space velocity of gas is very low resulting in decreased conversion

B. Rate of reaction is very low

C. Very high pressure is required resulting in costly pressure vessel

D. None of these

167. Superphosphate is manufactured by reacting phosphate rock with_____________________?
comments icon0

A. None of these

B. Sulphuric acid

C. Aluminium chloride

D. Acetic acid

168. Low grade coal is ______________ to produce ammonia synthesis gas?
comments icon0

A. Dehydrogenated

B. Gasified

C. Liquefied

D. Hydrogenated

169. Ammonium phosphate is a _____________ fertiliser?
comments icon0

A. Phosphatic

B. Nitrogenous

C. Mixed

D. Complex

170. Which of the following fertilisers contains the least percentage of nitrogen ?
comments icon0

A. Liquid ammonia

B. Ammonium phosphate

C. Ammonium sulphate

D. Urea

171. P2O5 percentage in the phosphoric acid produced by wet process is about_________________?
comments icon0

A. 50

B. 10

C. 30

D. 70

172. Main constituent of phosphate rock is_____________________?
comments icon0
A. Flour apatite

B. Ammonium phosphate

C. Calcium fluoride

D. Calcium phosphate

173. Heating of ortho-phosphoric acid to 250C produces___________________?
comments icon0
A. Pyrophosphoric acid

B. No change in it

C. Meta-phosphoric acid

D. None of these

174. Pick out the correct statement?
comments icon0

A. Reaction of NH3 with HNO3 to produce (NH4)2NO3 is endothermic

B. With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and

C. al feed rate</strong>

D. Biuret (an intermediate during urea manufacture) is toxic to seeds and animals

E. Both B. and C.

175. Ammonia synthesis gas is produced from natural gas by___________________?
comments icon0

A. Partial oxidation

B. Hydrogenation

C. Steam reforming

D. Thermal cracking

176. Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is___________________?
comments icon0
A. Exothermic

B. None of these

C. Autocatalytic

D. Endothermic

177. Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content?
comments icon0
A. N2

B. KNO3

C. NO2

D. NHO3

178. Reaction of calcium Fluorapatite with sulphuric acid produces ___________________?
comments icon0

A. Red phosphorous

B. Ortho-phosphoric acid

C. Simple superphosphate

D. Triple superphosphate

179. Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of_____________ percent concentration?
comments icon0

A. 75-80

B. 52-54

C. > 98

D. 25-28

180. Ammonium nitrate (a fertiliser) is coated with limestone powder to ____________________?
comments icon0

A. Add extra nutrient as fertiliser

B. Cut down its production cost

C. Increase its nitrogen content

D. Avoid the risk of explosion