MCQOPTIONS
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MCQOPTIONS
This section includes 2171 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1901. |
An increase in the NH₃/CO₂ ratio in urea manufacture results in |
| A. | increased degree of conversion of CO₂ to urea. |
| B. | decreased degree of conversion of NH₃ to urea. |
| C. | decreased yield of urea. |
| D. | decreased specific volume of molten mass. |
| Answer» B. decreased degree of conversion of NH₃ to urea. | |
| 1902. |
A nitrogenous fertiliser contains 20% N₂. It could be |
| A. | ammonium nitrate. |
| B. | calcium ammonium nitrate (CAN). |
| C. | urea. |
| D. | ammonium chloride. |
| Answer» C. urea. | |
| 1903. |
Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ? |
| A. | Nitrogeneous fertiliser |
| B. | Potassic fertiliser |
| C. | Phosphatic fertiliser |
| D. | None of these |
| Answer» B. Potassic fertiliser | |
| 1904. |
Biuret formation in urea is kept at minimum (< 1 %), because it is |
| A. | corrosive in nature. |
| B. | toxic and harmful to some crops. |
| C. | helpful in decomposition of urea. |
| D. | explosive in nature. |
| Answer» C. helpful in decomposition of urea. | |
| 1905. |
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 |
| A. | rate of reaction is very low. |
| B. | very high pressure is required resulting in costly pressure vessel. |
| C. | space velocity of gas is very low resulting in decreased conversion. |
| D. | none of these |
| Answer» B. very high pressure is required resulting in costly pressure vessel. | |
| 1906. |
In calcium ammonium nitrate (CAN) fertil-ser |
| A. | nitrate nitrogen is quick acting |
| B. | ammoniacal nitrogen is quick acting |
| C. | nitrate nitrogen is slower acting |
| D. | none of these |
| Answer» B. ammoniacal nitrogen is quick acting | |
| 1907. |
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 | |
| 1908. |
Vetrocoke solution is |
| A. | a mixture of K₂CO₃ and As₂O₃. |
| B. | K₂SO₄. |
| C. | a mixture of Na₂CO₃ and As₂O₃. |
| D. | Na₂SO₄. |
| Answer» B. K₂SO₄. | |
| 1909. |
Reaction of dilute sulphuric acid with phosphate rock produces |
| A. | phosphoric acid |
| B. | superphosphate |
| C. | triple superphosphate |
| D. | gypsum |
| Answer» B. superphosphate | |
| 1910. |
Superphosphate is manufactured by reacting phosphate rock with |
| A. | acetic acid |
| B. | sulphuric acid |
| C. | aluminium chloride |
| D. | none of these |
| Answer» C. aluminium chloride | |
| 1911. |
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°C | |
| 1912. |
Base suspension fertiliser essentially contains |
| A. | 13% N₂ and 43% P₂O₅ |
| B. | 43% N₂ and 13% P₂O₅ |
| C. | 43% N₂ and 13% K₂O |
| D. | 43% K₂O and 43% P₂O₅ |
| Answer» B. 43% N₂ and 13% P₂O₅ | |
| 1913. |
Liquid ammonia is not used as such a fertiliser in tropical countries like India, because |
| A. | its N₂ 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. | |
| 1914. |
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 ? |
| A. | 1.5:1 |
| B. | 3.5:1 |
| C. | 10:1 |
| D. | 15:1 |
| Answer» C. 10:1 | |
| 1915. |
Which of the following does not come under the category of 'secondary nutrient' for plant growth? |
| A. | Calcium |
| B. | Magnesium |
| C. | Sulphur |
| D. | Oxygen |
| Answer» E. | |
| 1916. |
Which is a catalyst promoter used in catalytic ammonia synthesis reaction ? |
| A. | Al₂O₃ |
| B. | Cr₂O₃ |
| C. | K₂O |
| D. | MnO |
| Answer» D. MnO | |
| 1917. |
(CH₃C₆H₄)₃PO₄ is the chemical formula of |
| A. | triple superphosphate |
| B. | tricresyl phosphate |
| C. | flourapatite |
| D. | superphosphate |
| Answer» C. flourapatite | |
| 1918. |
Reaction of phosphate rock with 98% H₂SO₄ produces |
| A. | orthophosphoric acid |
| B. | superphosphate |
| C. | white phosphorous |
| D. | none of these |
| Answer» B. superphosphate | |
| 1919. |
Main constituent of phosphate rock is |
| A. | ammonium phosphate |
| B. | flour apatite |
| C. | calcium fluoride |
| D. | calcium phosphate |
| Answer» C. calcium fluoride | |
| 1920. |
Phosphoric acid is produced in wet process from phosphate rock and |
| A. | dilute H₂SO₄ |
| B. | concentrated H₂SO₄ |
| C. | concentrated NHO₃ |
| D. | concentrated HCl |
| Answer» B. concentrated H₂SO₄ | |
| 1921. |
Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction. |
| A. | catalytic |
| B. | exothermic |
| C. | endothermic |
| D. | reversible |
| Answer» C. endothermic | |
| 1922. |
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 | |
| 1923. |
__________ is not a fertiliser. |
| A. | Calcium ammonium nitrate |
| B. | Ferrous sulphate |
| C. | Liquid ammonia |
| D. | Ammonium sulphate |
| Answer» C. Liquid ammonia | |
| 1924. |
Reaction of orthophosphoric acid with soda ash produces |
| A. | sodium tripolyphosphate (STPP) |
| B. | tricresyl phosphate |
| C. | tributyl phosphate |
| D. | nitrophosphate |
| Answer» B. tricresyl phosphate | |
| 1925. |
Dehydration of ammonium carbamate to yield urea is a/an __________ reaction. |
| A. | exothermic |
| B. | endothermic |
| C. | autocatalytic |
| D. | catalytic |
| Answer» C. autocatalytic | |
| 1926. |
Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ? |
| A. | Urea |
| B. | CAN |
| C. | Ammonium sulphate |
| D. | Calcium cyanamide |
| Answer» E. | |
| 1927. |
__________ catalyst is used in the production of urea from CO₂ and NH₃. |
| A. | Vanadium pentoxide |
| B. | No |
| C. | Alumina |
| D. | Nickel |
| Answer» C. Alumina | |
| 1928. |
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. |
| A. | stabilisation |
| B. | increasing the effectiveness |
| C. | improving the strength & heat resistance |
| D. | all a, b & c |
| Answer» E. | |
| 1929. |
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas? |
| A. | Water |
| B. | Naphtha |
| C. | Tar |
| D. | Coal/coke oven gas |
| Answer» D. Coal/coke oven gas | |
| 1930. |
Both white phosphorous as well as red phosphorous |
| A. | are soluble in CS₂. |
| B. | burns when heated in air. |
| C. | reacts with hot caustic soda solution to give phosphine. |
| D. | all (a), (b), and (c). |
| Answer» C. reacts with hot caustic soda solution to give phosphine. | |
| 1931. |
Triple superphosphate is made by reacting phosphate rock with __________ acid. |
| A. | phosphoric |
| B. | nitric |
| C. | sulphuric |
| D. | hydrochloric |
| Answer» B. nitric | |
| 1932. |
__________ is required more for leafy crops. |
| A. | Nitrogen |
| B. | Phosphorous |
| C. | Potassium |
| D. | Carbon |
| Answer» B. Phosphorous | |
| 1933. |
Catalyst used in steam reforming of naphtha is |
| A. | nickel |
| B. | platinum |
| C. | silica gel |
| D. | rhodium |
| Answer» B. platinum | |
| 1934. |
Catalyst used in the manufacture of NH₃ by Haber's process is finely divided |
| A. | nickel |
| B. | iron |
| C. | vanadium pentoxide |
| D. | alumina |
| Answer» C. vanadium pentoxide | |
| 1935. |
Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by |
| A. | steam reforming of naphtha and cracking of natural gas. |
| B. | electrolysis of water. |
| C. | cryogenic separation of hydrogen from coke oven gas. |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 1936. |
In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed. |
| A. | Fauser-Monte Catini |
| B. | Claude |
| C. | Udhe |
| D. | Kellog |
| Answer» C. Udhe | |
| 1937. |
Prilling tower is found in the flowsheet for the manufacture of |
| A. | ammonia |
| B. | urea |
| C. | superphosphate |
| D. | triple superphosphate |
| Answer» C. superphosphate | |
| 1938. |
A potassic fertiliser contains 50% K₂O. It could be |
| A. | potassium sulphate. |
| B. | potassium chloride. |
| C. | a mixture of NaCl+ KCl. |
| D. | none of these. |
| Answer» B. potassium chloride. | |
| 1939. |
Which is the most suitable fertiliser for paddy ? |
| A. | CAN |
| B. | Ammonium sulphate |
| C. | Ammonium nitrate |
| D. | Superphosphate |
| Answer» C. Ammonium nitrate | |
| 1940. |
Ammonia synthesis gas is produced from fuel oil by |
| A. | steam reforming |
| B. | hydrocracking |
| C. | partial oxidation |
| D. | hydrogenation |
| Answer» D. hydrogenation | |
| 1941. |
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C. |
| A. | 250-300 |
| B. | 500-750 |
| C. | 950-1050 |
| D. | 1400-1450 |
| Answer» E. | |
| 1942. |
Which is the best fertiliser for paddy ? |
| A. | Ammonium sulphate |
| B. | Nitro-phosphate |
| C. | Superphosphate |
| D. | Potassium nitrate |
| Answer» B. Nitro-phosphate | |
| 1943. |
Main component of bone ash is |
| A. | calcium sulphate |
| B. | calcium phosphate |
| C. | calcium carbonate |
| D. | sodium phosphate |
| Answer» C. calcium carbonate | |
| 1944. |
Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 80 |
| Answer» C. 50 | |
| 1945. |
Phosphorus vapour comprises of |
| A. | P |
| B. | P₂ |
| C. | P₃ |
| D. | P₄ |
| Answer» E. | |
| 1946. |
Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is |
| A. | exothermic |
| B. | endothermic |
| C. | autocatalytic |
| D. | none of these |
| Answer» B. endothermic | |
| 1947. |
Commercial fertilisers are available mostly in the form of |
| A. | powder |
| B. | grannules |
| C. | lumps |
| D. | flakes |
| Answer» C. lumps | |
| 1948. |
Ammonia synthesis gas is produced from natural gas by |
| A. | thermal cracking |
| B. | steam reforming |
| C. | partial oxidation |
| D. | hydrogenation |
| Answer» C. partial oxidation | |
| 1949. |
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 | |
| 1950. |
Monte catini process is used for the manufacture of |
| A. | nitric acid |
| B. | phosphoric acid |
| C. | urea |
| D. | calcium ammonium nitrate (CAN) |
| Answer» D. calcium ammonium nitrate (CAN) | |