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- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Metallic character decreases and non-metallic character increases on moving fr
- #Joint Entrance Examination Main
- #Classification of Elements and Periodic table
- #Chemistry
- #Engineering
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period. Reason (R) : It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period. In the light of the above statements, choose the most appropriate answer from the options given below :
Option: 1 (A) is false but (R) is true.
Option: 2 Both (A) and (R) are correct and (R) is the correct explanation of (A).
Option: 3 Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Option: 4 (A) is true but (R) is false.
Answers (1)
On moving from left to right in a period , the metallic character decreases while the non- metallic character increases.
This is due to increase in Ionisation enthalpy and increase in magnitude of electron gain
enthalpy
Thus, Assertion (A) is true while Reason (R) is false
Hence, the answer is option (4)
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