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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
1
Medium
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Analyzing
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Assertion (A): and show some similar properties.
Reason (R): The metallic radius of is less than the metallic radius of .
Reason (R): The metallic radius of is less than the metallic radius of .
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Correct option: B
Both Assertion and Reason are correct; and Reason is not the correct explanation of Assertion
Option B is correct. Beryllium (Be) and Aluminum (Al) exhibit diagonal relationship due to similar polarizing power, but the reason given about metallic radii is true but not the correct explanation for the similarity in properties.
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The elements with zero electron affinity are
S-I: paramagnetic.
S-II: All the orbitals present in ion are doubly occupied. Which of the following is the most electropositive element? The law of Octaves is not applicable to: Assertion (A): Mendeleev's arranged elements in horizontal rows and vertical columns.
Reason (R): Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect. Which of the following electronic configuration does not belong to same block as others?
S-II: All the orbitals present in ion are doubly occupied. Which of the following is the most electropositive element? The law of Octaves is not applicable to: Assertion (A): Mendeleev's arranged elements in horizontal rows and vertical columns.
Reason (R): Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect. Which of the following electronic configuration does not belong to same block as others?