Question : Which of the following is used as fuel rods in an atomic reactor?

Option 1: Sodium

Option 2: Uranium

Option 3: Graphite

Option 4: Boron

Question : Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are

Option 1: Boron and Cadmium

Option 2: Boron and Plutonium

Option 3: Cadmium and Uranium

Option 4: Uranium and Boron

Question : In the Canada Deuterium Uranium (CANDU) reactor, a natural uranium-fuelled reactor, the function of moderator and coolant is performed by:

Option 1: Light water

Option 2: Carbon dioxide

Option 3: Heavy water

Option 4: Sodium

Question : Which of the following is widely used in making semiconductor chips?

Option 1: Radium

Option 2: Sodium

Option 3: Germanium

Option 4: Sulphur

Question : Which of the following is not a food preservative?

Option 1: Aqua regia

Option 2: Vinegar

Option 3: Sodium chloride

Option 4: Sodium nitrite