MCQ
Note : In the following questions a statement of Assertion $(A)$ followed by a statement of reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : Boron has a smaller first ionisation enthalpy than beryllium.
Reason $(R)$ : The penetration of a $2s$ electron to the nucleus is more than the $2p$ electron hence $2p$ electron is more shielded by the inner core of electrons than the $2s$ electrons.
Assertion $(A)$ : Boron has a smaller first ionisation enthalpy than beryllium.
Reason $(R)$ : The penetration of a $2s$ electron to the nucleus is more than the $2p$ electron hence $2p$ electron is more shielded by the inner core of electrons than the $2s$ electrons.
- AAssertion and reason both are correct statements but reason is not correct explanation for assertion.
- BAssertion is correct statement but reason is wrong statement.
- ✓Assertion and reason both are correct statements and reason is correct explanation for assertion.
- DAssertion and reason both are wrong statements.