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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements1 Mark
MCQ
Directions : In the following questions, the Assertions $(A)$ and Reason $(s) (R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion : In $p -$ block elements a lot of variation in properties of elements in a group is observed.
Reason : Difference in inner core of electronic configuration greatly influences the physical and chemical properties of elements. In $p - $ block elements a lot of variation in properties of elements in a group is observed.
  • ✓
    Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  • B
    Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  • C
    Assertion is correct but Reason is incorrect.
  • D
    Both Assertion and Reason are incorrect.
✓

Answer

Correct option: A.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
The inner core of the electronic configuration may, however, differ.
The difference in inner core of elements greatly influences their physical properties $($such as atomic and ionic radii, ionisation enthalpy, etc.$)$ as well as chemical properties.
Consequently, a lot of variation in properties of elements in a group of $p -$ block is observed.

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