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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
Which of the following order is incorrect ?
  • A
    Electronegativity of central atom : $CF_4 > CH_4 > SiH_4$
  • ✓
    Hydration energy : $Al^{3+} > Be^{2+} > Mg^{2+} > Na^+$
  • C
    Electrical conductance : $F^-_{(aq.)} > Cl^-_{(aq.)} > S^{2-}_{(aq.)}$
  • D
    Magnetic moment : $Ni^{4+} >  V^{3+} > Sr^{2+}$
✓

Answer

Correct option: B.
Hydration energy : $Al^{3+} > Be^{2+} > Mg^{2+} > Na^+$
b
$Cl _{2} O _{7} \quad$ Acidic

$Na _{2} O \quad$ Basic

$Al _{2} O _{3} \quad$ Amphoteric

$N _{2} O \quad$ Neutral

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