3591. Nuclear power reactor located at Tarapur is of __________ type.
fast breeder
pressurised water
boiling water
gas cooled
✅ The correct answer is option C.
Chemical Engineering
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3592. A control rod
should have small absorption cross-section.
is generally made of boron, hafnium or cadmium.
should have large absorption cross-section.
both (b) and (c).
✅ The correct answer is option D.
3593. Ordinary water is not used as a moderator because, it
has a low absorption cross-section.
has a low scattering cross-section.
absorbs neutrons.
does not absorb neutrons.
✅ The correct answer is option C.
3594. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
24
18
6
36
✅ The correct answer is option B.
3595. __________ is the most suitable fertiliser for paddy.
Urea
Ammonium sulphate
Superphosphate
Potassium nitrate
✅ The correct answer is option B.
3596. Optimum reaction temperature in steam reforming of naphtha is __________ °C.
700 – 1000
300 – 450
1500-1700
100-200
✅ The correct answer is option A.
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.
3598. Potassic fertilisers
Are useful during early stage of the plant growth
Stimulate early growth and accelerate seeding
Help in development of starches of potatoes and grain
None of these
✅ The correct answer is option C.
3599. 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
CaSO₄ .½H₂O and CaSO₄ crystals
Pyrophosphoric acid
Metaphosphoric acid
All of the above
✅ 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.