MCQ- 1 ICSE Physics class 10 ch-6 Modern Physics

Structure of the Atom and Isotopes - Class 10 Physics

1. Who proposed the nuclear model of the atom?

J.J. Thomson
Ernest Rutherford
John Dalton
Niels Bohr

Correct Answer: Ernest Rutherford

2. What is the major difference between isotopes of the same element?

Number of electrons
Atomic number
Number of neutrons
Chemical properties

Correct Answer: Number of neutrons

3. Which isotope is commonly used in nuclear power plants for energy generation?

Uranium-235
Carbon-14
Iodine-131
Hydrogen-2

Correct Answer: Uranium-235

4. Which application uses the isotope Carbon-14?

Nuclear medicine
Carbon dating
Energy generation
Food irradiation

Correct Answer: Carbon dating

5. What property of isotopes makes them useful in medical treatments?

Radioactivity
High density
Low melting point
High reactivity

Correct Answer: Radioactivity