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  • Assertion (A): Generally, ionisation enthalpy increases from left to right in a period. Reason (R): When successive electrons are added to the orbitals in the same principal quantum level,

In the following questions, a statement of Assertion (A) followed by a statement of the reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Generally, ionisation enthalpy increases from left to right in a period.

Reason (R): When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.

  1. Assertion is correct statement and reason is wrong statement.
  2. Assertion and reason both are correct statements and reason is correct explanation of assertion.
  3.  Assertion and reason both are wrong statements.
  4. Assertion is wrong statement and reason is correct statement

Answers (1)

The answer is the option (ii) Assertion, and reason both are correct statements and reason is correct explanation of assertion.

Explanation: Ionisation enthalpy depends upon the nuclear force which attracts electrons and on the repulsion of electrons from one another.

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