chemical engineering fertilizer technology MCQs – Page 3

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 Review each marked answer and report any item that may be outdated or unclear.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
101. ____________ catalyst is used in the production of urea from CO2 and NH3?
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A. Vanadium pentoxide

B. Nickel

C. No

D. Alumina

102. Which of the following does not come under the category of secondary nutrient for plant growth ?
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A. Sulphur

B. Calcium

C. Oxygen

D. Magnesium

103. Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?
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A. Al2O3

B. Cr2O3

C. MnO

D. K2O
104. Which is the best fertiliser for paddy ?
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A. Potassium nitrate

B. Ammonium sulphate

C. Nitro-phosphate

D. Superphosphate

105. Potassic fertilisers__________________?
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A. Help in development of starches of potatoes and grain

B. None of these

C. Stimulate early growth and accelerate seeding

D. Are useful during early stage of the plant growth

106. Phosphorus vapour comprises of ___________________?
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A. P4

B. P2

C. P

D. P3

107. The optimum size of the ammonia plant is ______________ tons/day?
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A. 1000

B. 1000

C. 10

D. 100

108. The composition of fresh feed to the high temperature, high pressure urea autoclave is______________________?
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A. Excess liquid ammonia and compressed CO2 gas

B. Excess liquid ammonia and liquefied CO2

C. Liquid ammonia and excess compressed CO2

D. Compressed ammonia gas and excess compressed CO2

109. With increases in pressure, the conversion of Ammonium carbamate into urea___________________?
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A. Can either increase or decrease depends on biuret content

B. Decreases

C. Remains unaltered

D. Increases
110. Nitrogenous fertiliser is required__________________?
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A. For accelerating fruit formation in later stage of growth

B. During the early stage of growth to promote development of stem and leaves

C. To lessen the effect of excessive potash application

D. None of these

111. Catalytic ammonia synthesis reaction as in Habers process is_________________?
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A. Endothermic

B. Exothermic

C. Irreversible

D. None of these

112. Maximum nitrogen percentage is in________________?
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A. Calcium ammonium nitrate

B. Ammonium sulphate

C. Liquid ammonia

D. Urea

113. Yield of elemental phosphorous from rock phosphate is about _____________ percent?
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A. 2-Jan

B. 40-45

C. 60-65

D. 15-25
114. The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ____________ percent?
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A. 95

B. 100

C. 60

D. 30

115. Which of the following set of conditions is favourable for the maximum yield of ammonia by Habers process ?
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A. High pressure, low reactants concentration, low temperature

B. High pressure, low reactants concentration, high temperature

C. High pressure, high reactants concentration, low temperature

D. Low pressure, high reactants concentration, low temperature

116. Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis ?
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A. Electrolysis of water

B. Steam reforming of naphtha

C. H2 separation from coke oven gas

D. Cracking of natural gas

117. NPK means a ______________ fertiliser?
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A. Mixed

B. Liquid

C. Potassic

D. Solid

118. Iron is not used alone as a catalyst in ammonia synthesis, because___________________?
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A. It gets oxidised above 500C

B. It decomposes ammonia

C. Its activity declines rapidly, if heated to above 520C

D. None of these

119. Maximum stability of white phosphorous is at__________________?
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A. > 600C

B. Atmospheric pressure

C. Room temperature

D. Very high pressure

120. Action of phosphoric acid on rock phosphate produces_________________?
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A. Superphosphate

B. Triple superphosphate

C. Diammonium phosphate

D. Nitrophosphate

121. Nitric acid is produced on commercial scale in a fertiliser plant by___________________?
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A. CaNO3 + H2SO4 reaction

B. Passing air through high voltage electric arc

C. Oxidation of ammonia

D. None of these

122. Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
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A. Sulphuric acid

B. Coke

C. Phosphoric acid

D. Silica and coke
123. Reaction of ______________ acid with phosphate rock produces superphosphates?
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A. Sulphuric

B. Nitric

C. Hydrochloric

D. Phosphoric

124. P2O5 content in superphosphate is about _____________ percent?
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A. 85-90

B. 15-20

C. 65-70

D. 30-35

125. P2O5 content in triple superphosphate is about ______________ percent?
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A. 85-90

B. 15-20

C. 42-50

D. 70-75

126. Plant tranquillisers___________________?
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A. Produce seedless fruit

B. Hold back stem growth and halt plants at a desired height

C. Accelerate ripening of food and grain

D. Cause early maturation of plants

127. During conversion of ammonium carbamate into urea, presence of large excess of water______________?
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A. Adversely affects the yield of urea

B. Does not affect the yield of urea

C. Reduces the evaporator load by diluting the urea solution

D. Increases the yield of urea

128. A phosphatic fertiliser contains 16% P2O5. It could be________________?
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A. None of these

B. Triple superphosphate

C. Superphosphate

D. Dicalcium phosphate

129. Fertiliser produced during soda ash manufacture by dual process is ammonium______________________?
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A. Sulphate

B. None of these

C. Chloride

D. Nitrate

130. Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?
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A. Cryogenic separation of hydrogen from coke oven gas

B. Electrolysis of water

C. Steam reforming of naphtha and cracking of natural gas

D. All A., B. and C.
131. Leaching of phosphate rock by strong ____________ acid produces phosphoric acid ?
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A. Either A. or B.

B. Sulphuric

C. Hydrochloric

D. Neither A. nor B.

132. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the _______________ process?
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A. Du-ponts

B. Le-chateliers

C. Stengel

D. Habers

133. Reaction of dilute sulphuric acid with phosphate rock produces ____________________?
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A. Phosphoric acid

B. Gypsum

C. Triple superphosphate

D. Superphosphate

134. Pick out the wrong statement?
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A. Dehydration of ammonium carbamate to produce urea is endothermic

B. Phosphate rock when reacted with dilute H2SO4 produces superphosphate

C. ho-phosphoric acid

D. Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of

E. Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
135. Pick out the wrong statement?
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A. Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence

B. Application of large excess of Potassic fertiliser in soil increases the valuable carotene in

C. orosis

D. Cereal crops grown on alkaline soil absorb higher amount of fluorides thereby spreading

E. its and vegetables</strong>

F. plant roots penetrate with difficulty

136. Chemical formula of biuret is_________________?
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A. NH2.CO.NH2

B. NH2CONHCONH2

C. NH4COONH2

D. NH3.COO.NH3

137. Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?
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A. Nitrogenous fertilisers

B. Phosphatic fertilisers

C. None of these

D. Potassic fertiliser
138. Heating a mixture of phosphate rock, coke and sand in an electric furnace produces___________________?
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A. Phosphoric acid

B. Ammonium phosphate

C. Superphosphate

D. Phosphorous
139. Vetrocoke solution is_________________?
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A. K2SO4

B. A mixture of K2CO3 and As2O3

C. Na2SO4

D. A mixture of Na2CO3 and As2O3

140. H3PO4 is the chemical formula of ______________ phosphoric acid?
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A. None of these

B. Ortho

C. Meta

D. Pyro

141. A nitrogenous fertiliser contains 20% N2. It could be_________________?
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A. Ammonium nitrate

B. Calcium ammonium nitrate (CAN)

C. Urea

D. Ammonium chloride

142. Which of the following is not a mixed fertiliser ?
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A. Calcium ammonium nitrate (CAN)

B. Ammonium phosphate

C. Nitrophosphate

D. None of these

143. pH value of soil is maintained at ______________ by the addition of fertiliser for optimum growth and health of the plant?
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A. 10-Sep

B. 13-Dec

C. 7-8

D. 5-Apr

144. Pick out the wrong statement ?
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A. Calcium present in the fertiliser helps in correcting the soil acidity

B. Nitrogen is normally supplied in fertiliser either in Ammoniacal or the nitrate form, from

C. Particle size range of a good granular fertiliser is 10-15 mesh and it contains less moisture as

D. e ovens</strong>

E. ch the soil takes it up in the form of ammonium ions or nitrate ions and forms amino acids

F. pared to finely divided powder form of fertiliser

145. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ?
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A. Calcium nitrate

B. Urea

C. Calcium ammonium nitrate (CAN)

D. Ammonium sulphate

146. Catalyst used in the oxidation of ammonia is ________________?
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A. Platinum-beryllium

B. Platinum-molybdenum

C. Cobalt-molybdenum

D. Platinum-rhodium
147. Nitrolime is chemically known as____________________?
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A. Calcium nitrate

B. None of these

C. Ammonium nitrate

D. Calcium ammonium nitrate (CAN)
148. Gas based fertiliser plants use_________________?
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A. Natural gas as a source of hydrogen

B. Coal gas as heating medium

C. Coal gas as a source of hydrogen

D. Natural gas as heating medium

149. Reaction of phosphate rock with 98% H2SO4 produces ______________________?
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A. White phosphorous

B. Ortho-phosphoric acid

C. None of these

D. Superphosphate

150. Heating of ortho-phosphoric acid to about 900C, produces_________________?
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A. None of these

B. Pyrophosphoric acid

C. Meta-phosphoric acid

D. No change in it