1. Which of the following fertilisers contains the least percentage of nitrogen?

2. Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

3. Reaction of anhydrous liquid ammonia with orthophosphoric acid produces

4. The optimum size of the ammonia plant is __________ tons/day.

5. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)

6. Temperature and pressure in urea autoclave is

7. Pick out the wrong statement.

8. Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is

9. Reaction of cresylic acid with __________ produces tricresyl phosphate.

10. Catalyst used in steam reforming of naphtha is

11. Catalyst used in steam reforming of naphtha is

12. In an ammonia plant, the purge off is essential to

13. Which of the following is not a measure component necessarily to be present in fertilisers?

14. Color of nitric acid is light yellow due to the presence of

15. Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

16. Sodium tri poly phosphate (STPP) is chemically represented as

17. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.

18. Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

19. __________ is not a fertiliser.

20. Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.

21. I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at

22. CaH₄(PO₄)₂ is the chemical formula of

23. Pick out the wrong statement.

24. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.

25. Nitrogen content of urea is about __________ percent.

26. Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

27. Ammonia synthesis reaction is

28. Ammonium nitrate is

29. Fertiliser plants get their N₂ requirements

30. Electric process as compared to wet process (for the manufacture of phosphoric acid)

31. Conditioners like finely divided peat are added to the fertiliser to

32. Gas based fertiliser plants use

33. Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because

34. Triple superphosphate is made by reacting phosphate rock with __________ acid.

35. Which is a catalyst promoter used in catalytic ammonia synthesis reaction?

36. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

37. Catalyst used in Haber’s process for ammonia production is

38. Chemical formula of biuret is

39. Action of phosphoric acid on rock phosphate produces

40. Calcium ammonium nitrate (CAN) is

41. Which of the following gasifiers can be attached to coal based fertiliser plants?

42. A phosphatic fertiliser contains 16% P₂O₅. It could be

43. Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

44. Catalytic ammonia synthesis reaction as in Haber’s process is

45. In ammonia synthesis (N₂ + 3H₂ = 2NH₃), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at

46. Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?

47. Promoter used in NH₃ synthesis catalyst is

48. Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.

49. Reaction of dilute sulphuric acid with phosphate rock produces

50. Reaction of orthophosphoric acid with phosphate rock produces

51. Reaction of nitric acid and sulphuric acid with phosphate rock produces

52. Catalyst used in desulphurisation of naphtha is

53. Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?

54. Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.

55. Fauser Monte Catini converter is used for

56. Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

57. P₂O₅ content in triple superphosphate is about __________ percent.

58. Yield of elemental phosphorous from rock phosphate is about __________ percent.

59. P₂O₅ content in superphosphate is about __________ percent.

60. Triple superphosphate is chemically represented as

61. Tricresyl phosphate is chemically represented as

62. Reaction of phosphate rock with 98% H₂SO₄ produces

63. Reaction of calcium fluorapatite with sulphuric acid produces

64. 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

65. Urea is a __________ fertiliser.

66. Pick out the wrong statement.

67. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?

68. __________ is the undesirable by-product produced in the manufacture of urea.

69. In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process

70. NPK fertiliser is a __________ fertiliser.

71. Raw materials for urea production are

72. Catalyst used in the manufacture of NH₃ by Haber’s process is finely divided

73. Base suspension fertiliser essentially contains

74. Temperature and pressure in ammonia converter is

75. Lower temperature and large excess of ammonia in urea melt

76. Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber’s process?

77. With increases in pressure, the conversion of ammonium carbamate into urea

78. Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha?

79. Nitrogen content of a nitrogenous fertiliser is 35%. It could be

80. Flushing liquor used for cooling coke oven gas constitutes of

81. Optimum reaction temperature in steam reforming of naphtha is __________ °C.

82. Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

83. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?

84. CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in

85. Urea is a better fertilizer than ammonium sulphate, because

86. Which is the best fertiliser for paddy?

87. Rock phosphate constitutes mainly of

88. Electric furnace method for production of phosphorous uses phosphate rock

89. Reaction of orthophosphoric acid with soda ash produces

90. Pick out the correct statement.

91. The composition of fresh feed to the high temperature, high pressure urea autoclave is

92. 5-10-5 fertilisers mean that they contain

93. Maximum nitrogen percentage is in

94. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

95. Low grade phosphate rock can be used in electrical furnace, because

96. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

97. Catalyst used in the oxidation of ammonia is

98. An increase in the NH₃/CO₂ ratio in urea manufacture results in

99. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

100. Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.

101. Monte catini process is used for the manufacture of

102. Maximum stability of white phosphorous is at

103. Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH₃

104. Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at

105. Main component of bone ash is

106. NPK means a __________ fertiliser.

107. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.

108. Biuret formation in urea is kept at minimum (< 1 %), because it is

109. Pick out the wrong statement.

110. Ammonium sulphate fertiliser is

111. Chemical formula of metaphosphoric acid is

112. Heating a mixture of phosphate rock, coke and sand in an electric furnace produces

113. In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

114. Which of the following is a natural inorganic fertiliser?

115. Which of the following solvents is used for the extraction of H₃PO₄ from CaCl₂ solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?

116. Which of the following is not a mixed fertiliser?

117. Red phosphorous is changed into white phosphorous by

118. Which nutrient in fertiliser makes the plant stems stronger and increases branching?

119. Nitrolime is

120. Potassic fertilisers do not promote the development of

121. H₄P₂O₇ is the chemical formula of __________ phosphoric acid.

122. Main constituent of phosphate rock is

123. The main constituent of rock phosphate is

124. The essential ingradient of all the synthesis gas is

125. In the manufacture of urea, the intermediate chemical formed is

126. During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH₃ to NO is about __________ percent.

127. Ammonium nitrate (a fertiliser) is coated with limestone powder to

128. Ammonium sulphate can be produced by reacting gypsum with

129. P₂O₅ percentage in the phosphoric acid produced by wet process is about

130. Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

131. HPO₃ is the chemical formula of __________ phosphoric acid.

132. Dehydration of ammonium carbamate produces

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

134. Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

135. Pick out the wrong statement.

136. Nitrogenous fertiliser is required

137. The fertiliser plant getting hydrogen by electrolysis of water is situated at

138. In calcium ammonium nitrate (CAN) fertil-ser

139. Raw materials for nitric acid manufacture are

140. H₃PO₄ is the chemical formula of __________ phosphoric acid.

141. A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia.

142. Both white phosphorous as well as red phosphorous

143. C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

144. Prilling tower is found in the flowsheet for the manufacture of

145. The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser.

146. Oxidation of ammonia is

147. Phosphatic fertilisers

148. Phosphorus vapour comprises of

149. Pick out the wrong statement.

150. Plant tranquillisers

151. (CH₃ C₆ H₄)₃ PO₄ is the chemical formula of

152. Potassic fertilisers

153. Monte catini process is a widely used process for the manufacture of

154. Low grade coal is __________ to produce ammonia synthesis gas.

155. A nitrogenous fertiliser contains 20% N₂. It could be

156. A fertiliser contains 82% N₂. It could be

157. The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.

158. Naphtha in a fertiliser plant is used as a source of

159. Fertiliser produced during soda ash manufacture by dual process is ammonium

160. __________ is required more for leafy crops.

161. In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.

162. Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.

163. Phosphoric acid is produced in wet process from phosphate rock and

164. Reaction of __________ acid with phosphate rock produces superphosphates.

165. Which of the following does not come under the category of ‘micro-nutrient’ for plant growth?

166. pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.

167. Effectiveness of a fertiliser is independent of the

168. Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

169. Two gas based fertiliser plants are located in

170. Which of the following does not come under the category of ‘secondary nutrient’ for plant growth?

171. Which of the following does not come under the category of’primary nutrient’ for plant growth?

172. Ammonia synthesis gas is produced from fuel oil by

173. Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

174. Ammonia synthesis gas is produced from natural gas by

175. Nitric acid is produced on commercial scale in a fertiliser plant by

176. Potassic fertiliser is graded based on its __________ content.

177. Phosphatic fertiliser is graded based on its __________ content.

178. During conversion of ammonium carbamate into urea, presence of large excess of water

179. Which of the following fertilisers is used as a cattle feed?

180. Rock phosphate used for the production of phosphatic fertiliser is mined at

181. Heating of orthophosphoric acid to 250°C produces

182. __________ is the most suitable fertiliser for paddy.

183. Ammonium phosphate is a __________ fertiliser.

184. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

185. Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?

186. __________ catalyst is used in the production of urea from CO₂ and NH₃.

187. Nitrolime is chemically known as

188. Which is the most suitable fertiliser for paddy?

189. Urea is formed only

190. Urea is represented as

191. A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

192. Catalyst used in ammonia synthesis uses __________ as a promoter.

193. Commercial fertilisers are available mostly in the form of

194. Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.

195. Hydrogen content of coke oven gas is __________ percent.

196. Vetrocoke solution is

197. In natural gas, the C/H ratio (by weight) varies in the range of

198. Out of the following, N₂ content is minimum in

199. Superphosphate is manufactured by reacting phosphate rock with

200. Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

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