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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
The correct statements is / are
  • A
    $IE_1$ of $In > IE_1$ of $Al$
  • B
    Out of $Na^\oplus $ and $Al^{3+} Na^\oplus$ has largest size in aqueous solution
  • ✓
    ${NO^-}_2$ and $O_3$ are isoelectronic species
  • D
    The decreasing order of $E.A.$ is $F > Cl > Br$
✓

Answer

Correct option: C.
${NO^-}_2$ and $O_3$ are isoelectronic species
c

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