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.
| 1701. |
Low grade phosphate rock can be used in electrical furnace, because |
| A. | of the better CaO/SiO₂ 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. | |
| 1702. |
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 | |
| 1703. |
Low grade coal is __________ to produce ammonia synthesis gas. |
| A. | hydrogenated |
| B. | liquefied |
| C. | gasified |
| D. | dehydrogenated |
| Answer» D. dehydrogenated | |
| 1704. |
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 |
| A. | low pressure. |
| B. | high pressure. |
| C. | very high temperature. |
| D. | atmospheric pressure; as the pressure has no effect on conversion. |
| Answer» C. very high temperature. | |
| 1705. |
Reaction of anhydrous liquid ammonia with orthophosphoric acid produces |
| A. | ammonium phosphate |
| B. | superphosphate |
| C. | triple superphosphate |
| D. | none of these |
| Answer» B. superphosphate | |
| 1706. |
Dehydration of ammonium carbamate produces |
| A. | urea |
| B. | biuret |
| C. | ammonia water |
| D. | none of these |
| Answer» B. biuret | |
| 1707. |
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°C and 550 atm. | |
| 1708. |
Promoter used in NH₃ synthesis catalyst is |
| A. | K₂O |
| B. | SiO₃ |
| C. | V₂O₅ |
| D. | U₂O₃ |
| Answer» B. SiO₃ | |
| 1709. |
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. |
| A. | 38 |
| B. | 68 |
| C. | 82 |
| D. | 98 |
| Answer» E. | |
| 1710. |
Which of the following does not come under the category of 'primary nutrient' for plant growth? |
| A. | Potassium |
| B. | Nitrogen |
| C. | Phosphorous |
| D. | Sulphur |
| Answer» E. | |
| 1711. |
Sodium tri poly phosphate (STPP) is chemically represented as |
| A. | Na₅P₃O₁₀ |
| B. | Na₄P₃O₈ |
| C. | Na₃P₄O₆ |
| D. | Na₂PO₄ |
| Answer» B. Na₄P₃O₈ | |
| 1712. |
__________ is the most suitable fertiliser for paddy. |
| A. | Urea |
| B. | Ammonium sulphate |
| C. | Superphosphate |
| D. | Potassium nitrate |
| Answer» C. Superphosphate | |
| 1713. |
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 (a), (b) and (c) |
| Answer» E. | |
| 1714. |
Electric furnace method for production of phosphorous uses phosphate rock |
| A. | and phosphoric acid |
| B. | and coke |
| C. | and sulphuric acid |
| D. | silica and coke |
| Answer» E. | |
| 1715. |
Ammonium phosphate is a __________ fertiliser. |
| A. | nitrogenous |
| B. | phosphatic |
| C. | complex |
| D. | mixed |
| Answer» E. | |
| 1716. |
The fertiliser plant getting hydrogen by electrolysis of water is situated at |
| A. | Namrup |
| B. | Nangal |
| C. | Rourkela |
| D. | Korba |
| Answer» C. Rourkela | |
| 1717. |
The optimum size of the ammonia plant is __________ tons/day. |
| A. | 10 |
| B. | 100 |
| C. | 1000 |
| D. | 1000C. |
| Answer» D. 1000C. | |
| 1718. |
Which of the following is not a mixed fertiliser ? |
| A. | Nitrophosphate |
| B. | Calcium ammonium nitrate (CAN) |
| C. | Ammonium phosphate |
| D. | None of these |
| Answer» C. Ammonium phosphate | |
| 1719. |
P₂O₅ percentage in the phosphoric acid produced by wet process is about |
| A. | 10 |
| B. | 30 |
| C. | 50 |
| D. | 70 |
| Answer» C. 50 | |
| 1720. |
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? |
| A. | Iso propyl alcohol |
| B. | Butyl alcohol |
| C. | Toluene |
| D. | Hexane |
| Answer» C. Toluene | |
| 1721. |
Gas based fertiliser plants use |
| A. | natural gas as a source of hydrogen. |
| B. | natural gas as heating medium. |
| C. | coal gas as a source of hydrogen. |
| D. | coal gas as heating medium. |
| Answer» B. natural gas as heating medium. | |
| 1722. |
Rock phosphate used for the production of phosphatic fertiliser is mined at |
| A. | Amjhor (Jharkhand) |
| B. | Talchar (Orissa) |
| C. | Bailladella (M.P.) |
| D. | Kiriburu (Bihar) |
| Answer» B. Talchar (Orissa) | |
| 1723. |
C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about |
| A. | 2 |
| B. | 6 |
| C. | 13 |
| D. | 20 |
| Answer» C. 13 | |
| 1724. |
Reaction of __________ acid with phosphate rock produces superphosphates. |
| A. | hydrochloric |
| B. | sulphuric |
| C. | nitric |
| D. | phosphoric |
| Answer» C. nitric | |
| 1725. |
Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process ? |
| A. | High pressure, low reactants concentration, high temperature. |
| B. | High pressure, low reactants concentration, low temperature. |
| C. | High pressure, high reactants concentration, low temperature. |
| D. | Low pressure, high reactants concentration, low temperature. |
| Answer» D. Low pressure, high reactants concentration, low temperature. | |
| 1726. |
In the manufacture of urea, the intermediate chemical formed is |
| A. | biuret |
| B. | ammonium carbamate |
| C. | ammonium carbonate |
| D. | none of these |
| Answer» C. ammonium carbonate | |
| 1727. |
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. | |
| 1728. |
Raw materials for urea production are |
| A. | CO₂ and N₂ |
| B. | CO₂, H₂ and N₂ |
| C. | NH₃ and CO |
| D. | HNO₃ and CaCO₃ |
| Answer» C. NH₃ and CO | |
| 1729. |
Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and |
| A. | nitric acid |
| B. | ammonia |
| C. | ammonium nitrate |
| D. | nitric oxide |
| Answer» C. ammonium nitrate | |
| 1730. |
Catalyst used in ammonia synthesis uses __________ as a promoter. |
| A. | Pt |
| B. | K₂O |
| C. | Al₂O₃ |
| D. | Ni |
| Answer» C. Al₂O₃ | |
| 1731. |
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 |
| A. | decreasing the pressure. |
| B. | decreasing the temperature. |
| C. | increasing the temperature. |
| D. | none of these. |
| Answer» D. none of these. | |
| 1732. |
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done. |
| A. | increased biuret formation |
| B. | high corrosion rate |
| C. | increased cost of equipment |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 1733. |
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. | |
| 1734. |
Nitric acid is produced on commercial scale in a fertiliser plant by |
| A. | oxidation of ammonia. |
| B. | CaNO₃ + H₂SO₄ reaction. |
| C. | passing air through high voltage electric arc. |
| D. | none of these. |
| Answer» B. CaNO₃ + H₂SO₄ reaction. | |
| 1735. |
Leaching of phosphate rock by strong __________ acid produces phosphoric acid. |
| A. | sulphuric |
| B. | hydrochloric |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 1736. |
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 | |
| 1737. |
The composition of fresh feed to the high temperature, high pressure urea autoclave is |
| A. | excess liquid ammonia and liquefied CO₂. |
| B. | excess liquid ammonia and compressed CO₂ gas. |
| C. | liquid ammonia and excess compressed CO₂. |
| D. | compressed ammonia gas and excess compressed CO₂. |
| Answer» C. liquid ammonia and excess compressed CO₂. | |
| 1738. |
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ? |
| A. | Calcium nitrate |
| B. | Calcium ammonium nitrate (CAN) |
| C. | Urea |
| D. | Ammonium sulphate |
| Answer» D. Ammonium sulphate | |
| 1739. |
H₄P₂O₇ is the chemical formula of __________ phosphoric acid. |
| A. | pyro |
| B. | ortho |
| C. | meta |
| D. | none of these |
| Answer» B. ortho | |
| 1740. |
Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration. |
| A. | 25-28 |
| B. | 52-54 |
| C. | 75-80 |
| D. | > 98 |
| Answer» C. 75-80 | |
| 1741. |
Largest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at |
| A. | Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat). |
| B. | Talchar (Orissa) and Ramagundam (A.P.) both under FCI. |
| C. | Korba (M.P.) and Talchar (Orissa) both under FCI. |
| D. | Haldia (W.B) and Namrup (Assam) both under HFC. |
| Answer» B. Talchar (Orissa) and Ramagundam (A.P.) both under FCI. | |
| 1742. |
Reaction of calcium fluorapatite with sulphuric acid produces |
| A. | ortho-phosphoric acid. |
| B. | simple superphosphate. |
| C. | triple superphosphate. |
| D. | red phosphorous. |
| Answer» C. triple superphosphate. | |
| 1743. |
The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser. |
| A. | nitrogenous |
| B. | phosphatic |
| C. | potassic |
| D. | none of these |
| Answer» C. potassic | |
| 1744. |
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. |
| A. | coke oven |
| B. | producer |
| C. | natural |
| D. | coal |
| Answer» D. coal | |
| 1745. |
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. | |
| 1746. |
pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant. |
| A. | 4-5 |
| B. | 7-8 |
| C. | 9-10 |
| D. | 12-13 |
| Answer» C. 9-10 | |
| 1747. |
Which of the following does not come under the category of 'micro-nutrient' for plant growth? |
| A. | Chlorine |
| B. | Iron |
| C. | Boron |
| D. | Carbon |
| Answer» E. | |
| 1748. |
Reaction of cresylic acid with __________ produces tricresyl phosphate. |
| A. | phosphorous pentoxide |
| B. | phosphorous oxychloride |
| C. | ammonium phosphate |
| D. | calcium phosphate |
| Answer» C. ammonium phosphate | |
| 1749. |
Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because |
| A. | it is hygroscopic and explosive in nature. |
| B. | it is highly acidic in nature. |
| C. | it is a liquid at room temperature. |
| D. | its nitrogen content is very less. |
| Answer» B. it is highly acidic in nature. | |
| 1750. |
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 |
| A. | has a pungent smell. |
| B. | vaporises at normal temperature. |
| C. | is toxic and highly corrosive. |
| D. | is in short supply. |
| Answer» C. is toxic and highly corrosive. | |