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Q.1: An alpha particle can produce fluorescence in———?
- ZnS
- Barium platinocyanide
- Calcium tungstate
- All of above
D
Q.2: Pair production cannot take place in a vacuum as —- is not conserved ?
- Energy
- Charge
- Mass
- Momentum
B
Q.3: CFC is used in ———?
- Refrigeration
- Aerosol spray
- Plastic foam industry
- All of above
D
Q.4: Average distance covered by alpha particles in the air before its ionizing power ceases is called its———?
- Trajectory
- Range
- Firing level
- Limit
B
Q.5: Which one of the following possesses greater penetration power ?
- α-rays
- β-rays
- γ-rays
- Neutron-rays
D
Q.6: The most useful tracer is———?
- Sr-90
- I-131
- CA-41
- C-14
D
Q.7: X-rays are electromagnetic waves like——–?
- Light waves
- Heat waves
- Microwaves
- γ-rays
D
Q.8: The charge on beta particle is——–?
- 1
- -1
- +2
- -2
A
Q.9: Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?
- Chargeless
- Massless
- Highly penetrating
- All of above
C
Q.10: Beta particles ionize an atom———?
- Due to the electrostatic force of attraction
- Due to the electrostatic force of repulsion
- Due to a direct collision
- Due to the gravitational force
B