Question

Which of the following oxides will form a salt with NaOH solution?
a. CaO b. MgO c. SO2 d. Li2 O

Answer 1

Answer:

c) Sio2

Explanation:

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Among given options BeO is an amphoteric oxide while B2O3 and SiO2 are acidic oxides. Thus, all of them react with NaOH to form salts.▼△▼△▼△▼△▼△▼△▼△▼△▼△▼△▼△▼△

Answer 2

The oxide that will form a salt with NaOH solution is $\[S{O_2}\]$.

Explanation:

• Metals form basic oxides while non-metals form acidic oxides.
• Basic oxides react with acids to form salt and water while acidic oxides react with a base to form salt and water.
• Among the given oxides, $\[CaO,\,MgO\,and\,L{i_2}O\]$ are basic oxides while only$\[S{O_2}\]$ is an acidic oxide.
• As $\[S{O_2}\]$ is an acidic oxide, it will react with Na Oh solution to form a salt. $\[S{O_2} + 2NaOH \to N{a_2}S{O_3} + {H_2}O\]$