3618. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of
Phosphoric acid
Superphosphate
Phosphorous
Triple superphosphate
✅ The correct answer is option C.
3621. Ammonia synthesis gas is produced from natural gas by
Thermal cracking
Steam reforming
Partial oxidation
Hydrogenation
✅ The correct answer is option B.
3624. Which of the following fertilisers is used as a cattle feed?
Urea
Calcium ammonium nitrate
Superphosphate
Ammonium sulphate
✅ The correct answer is option A.
3629. Main constituent of phosphate rock is
Ammonium phosphate
Flour apatite
Calcium fluoride
Calcium phosphate
✅ The correct answer is option B.
3597. Plant tranquillisers
Hold back stem growth and halt plants at a desired height
Cause early maturation of plants
Accelerate ripening of food and grain
Produce seedless fruit
✅ The correct answer is option A.
3600. A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
Salt & coke
Sand & coke
And coke
And sand
✅ The correct answer is option B.
3605. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?
Calcium nitrate
Calcium ammonium nitrate (CAN)
Urea
Ammonium sulphate
✅ The correct answer is option C.
3610. 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?
Iso propyl alcohol
Butyl alcohol
Toluene
Hexane
✅ The correct answer is option B.
3614. 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.
Stabilisation
Increasing the effectiveness
Improving the strength & heat resistance
All of the above
✅ The correct answer is option D.
3619. Rock phosphate constitutes mainly of
Fluorapatite
Di-calcium phosphate
Mono-calcium phosphate
Di-ammonium phosphate
✅ The correct answer is option A.