Question

Assertion
The chemical properties of different isotope are same.
Reason
Isotopes having same number of neutron.

• A. Both assertion and reason are true and reason is the correct explanation of assertion.
• B. Both assertion and reson are true but reason is not the correct explanation of assertion.
• C. Assertion is true but reason is false.
• D. Both assertion and reason are false.

Answer 1

The correct option is C Assertion is true but reason is false.

All the Isotopes of an element have identical chemical properties because they have the same number of electrons as an atom of that element but they have different numbers of neutrons. The different number of neutrons affects the mass number. The mass number determines the physical properties while the atomic number determines the chemical properties. Therefore, isotopes have similar chemical properties but different physical properties.
Option (c) is correct