Which element is used as moderator in nuclear reactor?

Related Mcqs:

1. A moderator is used in nuclear reactor in order to ?

   A. Accelerate the neutrons
   B. Slow down the speed of the neutrons
   C. Increase the number of elections
   D. Decrease the number of electrons
   E. None of these

2. A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect?

   A. Current
   B. Voltage
   C. Nuclear Radiation
   D. power
   E. None of these

3. In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called ?

   A. Chemical Reaction
   B. Nuclear reaction
   C. Fission nuclear reaction
   D. Fusion nuclear reaction
   E. None of these

4. Fuel used in a Fast Breeder Reactor is _____________?

   A. Uranium Oxide
   B. Uranium Plutonium carbide
   C. Uranium Plutonium Oxide
   D. Uranium thorium Oxide
   E. None of these

5. The most abundant element in the Earth’s crust is __________?

   A. Oxygen
   B. Hydrogen
   C. Carbon Dioxide
   D. Silicon

6. Which metallic element is liquid at room temperature?

   A. Zinc
   B. Nickel
   C. Lead
   D. Mercury

   Submitted by: Danish Balani

7. What is the first element in the periodic table?

   A. Hydrogen
   B. Helium
   C. Nitrogen
   D. Carbon

   Submitted by: Ashfaque Ali Khoso

8. Which of the following is a positively charged particle emitted by a radioactive element?

   A. Beta Rays
   B. Alpha Rays
   C. Gamma Rays
   D. None of these

   Submitted by: AKBAR ALI

9. Which of the following is a transition element?

   A. Cl
   B. Cu
   C. S
   D. None of these

   Submitted by: Majid Ali

10. The heaviest man made element found so for is__________?

    A. Promethium
    B. Ununoctium
    C. Francium
    D. Technetium

    Submitted by: Malik Asghar Hussain