Which pair of oxides is acidic in nature?

Question:

Which pair of oxides is acidic in nature?

1. $\mathrm{N}_{2} \mathrm{O}, \mathrm{BaO}$

2. $\mathrm{CaO}, \mathrm{SiO}_{2}$

3. $\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{CaO}$

4. $\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{SiO}_{2}$

Correct Option: , 4

Solution:

$\mathrm{B}_{2} \mathrm{O}_{3}$ and $\mathrm{SiO}_{2}$ both are oxides of non-metal and hence are acidic in nature.