Q11 / 125 · BITSAT 2020 · Chemistry

The correct order of acidic strength :

  • Correct answer
    A
    $\mathrm{Cl}_{2} \mathrm{O}_{7}>\mathrm{SO}_{2}>\mathrm{P}_{4} \mathrm{O}_{10}$
  • B
    $\mathrm{K}_{2} \mathrm{O}>\mathrm{CaO}>\mathrm{MgO}$
  • C
    $\mathrm{CO}_{2}>\mathrm{N}_{2} \mathrm{O}_{5}>\mathrm{SO}_{3}$
  • D
    $\mathrm{Na}_{2} \mathrm{O}>\mathrm{MgO}>\mathrm{Al}_{2} \mathrm{O}_{3}$

Solution

Acidic character of oxide $\propto$ Non-metallic nature of element. Non-metallic character increases along the period. Hence order of acidic character is $\mathrm{Cl}_{2} \mathrm{O}_{7}>\mathrm{SO}_{2}>\mathrm{P}_{4} \mathrm{O}_{10}$

Hence, the correct answer is option: 'A'.

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