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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
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The law of Octaves is not applicable to:
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Correct option: D
Option D (Se,Te,As) is correct because the Law of Octaves, proposed by Newlands, states that every eighth element has similar properties. This law was applicable up to Calcium (Ca). Se, Te, and As are beyond Calcium, making the law inapplicable.
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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? 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? Identify the least stable ion among the following
S-II: All the orbitals present in ion are doubly occupied. Which of the following is the most electropositive element? 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? Identify the least stable ion among the following