3530. P₂O₅ percentage in the phosphoric acid produced by wet process is about
10
30
50
70
✅ The correct answer is option B.
3535. Red phosphorous is changed into white phosphorous by
Heating in presence of light
Melting under pressure
Vaporisation followed by condensation
None of these
✅ The correct answer is option C.
3544. HPO₃ is the chemical formula of __________ phosphoric acid.
Pyro
Ortho
Meta
None of these
✅ The correct answer is option C.
3512. __________ nuclear reactor does not require a heat exchanger to supply steam to power turbine.
Molten sodium cooled
Helium cooled
Boiling water
Pressurised water
✅ The correct answer is option C.
3518. Which is not a fissile nuclear material ?
U-233
U-235
U-238
Pu-239
✅ The correct answer is option C.
3486. Which of the following is a non-fissile material ?
Plutonium-239
Uranium-235
Uranium-233
Thorium-232
✅ The correct answer is option D.
3492. Main source of __________ is monazite sand.
uranium
polonium
hafnium
thorium
✅ The correct answer is option D.
3496. Energy equivlant to one atomic mass unit (amu) is __________ MeV.
9.31
93.1
931
9310
✅ The correct answer is option C.
3504. Heavy water (D2O) in a nuclear reactor serves as a
coolant
moderator
both (a) & (b)
neutron absorber
✅ The correct answer is option C.
3509. The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
1-Apr
1-Aug
1-Feb
Jan-16
✅ The correct answer is option D.