Question: If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ____________ days?

• 1. 5
• 2. 10
• 3. 20
• 4. 30

Question: The new nucleus formed after β-decay of a radioactive element has___________________?

• 1. Less atomic number
• 2. Less atomic weight
• 3. More atomic number
• 4. More atomic weight

Question: Which of the following is a non-fissile material ?

• 1. Plutonium-239
• 2. Uranium-235
• 3. Uranium-233
• 4. Thorium-232

Question: Which of the following is not, a fertile material ?

• 1. Th-232
• 2. U-238
• 3. U-233
• 4. None of these

Question: Nuclear fuel complex, Hyderabad is engaged in the job of ___________________?

• 1. Manufacture of nuclear fuel elements/assemblies
• 2. Processing of uranium ore
• 3. Treatment of spent fuel
• 4. None of these

Question: Which of the following is a fuel for a fusion reactor (thermonuclear reactor) ?

• 1. Deuterium and tritium
• 2. U-233
• 3. Thorium
• 4. Heavy water

Question: How many atoms are present in one gm-atom of an element ?

• 1. 2 × 1023
• 2. 6 × 1023
• 3. 6 × 1032
• 4. 5 × 105

Question: ‘Light water’ used as a coolant in nuclear reactor is nothing but______________________?

• 1. Ordinary water
• 2. Mildly acidic (pH = 6) water
• 3. Mildly alkaline (pH = 8) water
• 4. None of these

Question: A radioactive isotope undergoes decay with respect to time following _____________ law?

• 1. Logarithmic
• 2. Exponential
• 3. Linear
• 4. Inverse square

Question: The decay product of tritium (a beta emitter) is_________________?

• 1. Lithium
• 2. Helium
• 3. Deuterium
• 4. Hydrogen