Main source of ______________ is monazite sand?

Related Mcqs:

1. Uranium percentage in monazite sand is about________________?

   A. 0.01
   B. 0.25
   C. 1.2
   D. 7

2. The main purpose of control rod in a nuclear reactor is to control the___________________?

   A. Chain reaction and hence the power output by regulating the number of secondary neutrons
   causing fission
   B. Emission of hazardous radiation
   C. Conversion of fissile material into fertile material
   D. Velocity of the secondary neutrons

3. The main ore of uranium is ______________________?

   A. Pitchblende
   B. Monazite sand
   C. Cassiterite
   D. Chalcopyrite

4. The main ore of thorium is_________________?

   A. Pitchblende
   B. Monazite sand
   C. Limonite
   D. Galena

5. In nuclear reactions, ______________ number is conserved?

   A. Mass
   B. Atomic
   C. Both A. & B.
   D. Neither A. nor B.

6. 75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours?

   A. 3/4
   B. 1/6
   C. 3
   D. 4

7. Extraction of uranium from its ore is done by ______________ method?

   A. Chemical
   B. Pyrometallurgical
   C. Physical beneficiation
   D. Electrometallurgical

8. The atomic number of an element is equal to the number of ______________ present in its atom?

   A. Neutrons
   B. Electrons
   C. Protons
   D. Either B. or C.

9. The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?

   A. 1/4
   B. 1/8
   C. 1/2
   D. 1/16

10. Energy equivalent to one atomic mass unit (amu) is ______________ MeV?

    A. 9.31
    B. 93.1
    C. 931
    D. 9310