Question

1 p
11. Assertion: The atoms of different elements having same mass number
but different atomic number are known as isobars. Reason: The sum
protons and neutrons in isobars is always different.
O
(a) If both assertion and reason are true and the reason is the correct explanation of
the assertion.
O
(b) If both the assertion and reason are true but the reason is the correct explanation
of the assertion.
O
(c) If assertion is true but reason is false.
O
(d) If both assertion and reason are false.​

Answer 1

Answer:

b) f both assertion and reason are true and the reason is not the correct  explanation of  the assertion.

Explanation:

Isobars are atoms of different elements having same atomic mass but different atomic number.

Atomic mass is the sum of neutrons and protons so if atomic mass of two atoms are same. So the sum of protons and neutrons will definitely be same.

Answer 2

Answer:

d) Both assertion and reason are false.

Explanation:

Isobars are the group of  atoms of different elements having same mass number but different atomic number.

Mass number= Neutrons + protons

Atomic number= number of protons

Thus in Isobars, the sum of protons and neutrons is always the same.

Therefore, Assertion and reason, both are false.

Example of isobars- Argon and Calcium. They have same Mass number i.e. 40u

Hope it helps you friend!