Which pair of oxides is acidic in nature?

Question:
Which pair of oxides is acidic in nature?

$\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{CaO}$
$\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{SiO}_{2}$
$\mathrm{N}_{2} \mathrm{O}, \mathrm{BaO}$
$\mathrm{CaO}, \mathrm{SiO}_{2}$

Correct Option: , 2

Solution:

$\left\{\begin{array}{l}\mathrm{CaO}, \mathrm{BaO}=\text { Basic Nature } \\ \mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{SiO}_{2}=\text { Acidic Nature } \\ \mathrm{N}_{2} \mathrm{O}=\text { Neutral oxide }\end{array}\right.$

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