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Question

In the following question a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.
Assertion (A) Generally, ionisation enthalpy increases from left to right in a period.
Reason (R) wehn quantum level, the shielding effect fo inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.
(a) Assertion is correct statement and reason is wrong statement.
(b) assertion and reason both are correct statements and reason is correct explanation of assertion.
(c) Assertion and reason both are wrong statements.
(d) Assertion is wrong statement and reason is correct statement.

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Solution

(b). Assertion and reason both are correct statements and reason is the correct explanation of assertion ionisation enthalpy increases along a period because effective nuclear charge increases and atomic size decreases.


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