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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 one of the following orders presents the correct sequence of the increasing basic nature of the given oxides ?
  • ✓
    $Al_2O_3 < MgO < Na_2O < K_2O$
  • B
    $MgO < K_2O < Al_2O_3  < Na_2O$
  • C
    $Na_2O < K_2O < MgO < Al_2O_3 $
  • D
    $K_2O < Na_2O < Al_2O_3 < MgO$
✓

Answer

Correct option: A.
$Al_2O_3 < MgO < Na_2O < K_2O$
a
$\mathop {VO_2^ \oplus }\limits^{ + 5} ,\,\mathop {C{r_2}O_7^{2 - }}\limits^{ + 6} ,\,\mathop {MnO_4^\Theta }\limits^{ + 7} $

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