Oxidation of ammonia
CaNO₃ + H₂SO₄ reaction
Passing air through high voltage electric arc
None of these
✅ The correct answer is option A.
Engineering
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3702. Oxidation of ammonia is
Exothermic
Endothermic
Non-catalytic
Autocatalytic
✅ The correct answer is option A.
3703. Which of the following does not come under the category of’primary nutrient’ for plant growth?
Potassium
Nitrogen
Phosphorous
Sulphur
✅ The correct answer is option D.
3704. Which nutrient in fertiliser makes the plant stems stronger and increases branching?
Nitrogen
Phosphorous
Potassium
Calcium
✅ The correct answer is option B.
3705. pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.
4-May
7-Aug
9-Oct
Dec-13
✅ The correct answer is option B.
3706. Electric furnace method for production of phosphorous uses phosphate rock
And phosphoric acid
And coke
And sulphuric acid
Silica and coke
✅ The correct answer is option D.
3707. Reaction of orthophosphoric acid with soda ash produces
Sodium tripolyphosphate (STPP)
Tricresyl phosphate
Tributyl phosphate
Nitrophosphate
✅ The correct answer is option A.
3708. In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.
Fauser-Monte Catini
Claude
Udhe
Kellog
✅ The correct answer is option B.
3709. The mass number of an element is equal to the number of __________ in the nucleus.
electrons
neutrons
protons
neutrons plus protons (i.e., nucleons)
✅ The correct answer is option D.
3710. One ‘amu’ is equivalent to
9.31 Mev
931 eV
931 MeV
931 J
✅ The correct answer is option C.