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NEETChemistryClassification of Elements and Periodicity in Properties

Consider the following (I) The order of first ionisation enthalpy of first three elements of 3^ rd period is Mg > Al > Na (II) The element with electronegativity of 3.5 is chlorine (III) The order of sizes of ions Mg ²⁺, Na ⁺, F ⁻ and O ²⁻ is Mg ²⁺ < Na ⁺ < F ⁻ < O ²⁻ (IV)The IUPAC name of the element with atomic number 106 is Bohrium. The correct statements are

Options

  1. AI & II only
  2. BII & III only
  3. CI & III only
  4. DII & IV only

Correct answer

C. I & III only

Step-by-step solution

Statement (II) is incorrect as oxygen is the element with an electronegativity of 3.5 and not chlorine. Statement (IV) is incorrect as the element with the atomic number 106 is seaborgium ( Sg ) and not Bohrium (Bh)

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