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Oxides MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:24 PM | #NEET

Quick Facts

  • Oxides is considered one of the most asked concept.

  • 25 Questions around this concept.

Solve by difficulty

Nitrogen dioxide and sulfur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?

Which of the statements given below is incorrect?

Which of the following oxides is a pollutant that is associated with the formation of smog and can cause respiratory problems, eye irritation, and damage to crops and buildings?

Which of the following oxides is known for its use as a powerful oxidizing agent, capable of decomposing organic matter and disinfecting water supplies?

Which of the following oxides is commonly used as a semiconductor material in electronic devices and solar panels?

Which of the following oxides is known for its use in the production of high-strength ceramics and as a refractory material in furnaces and crucibles?

Concepts Covered - 0

Oxides

A binary compound of oxygen with another element is called oxide. As already stated, oxygen reacts with most of the elements of the periodic table to form oxides. In many cases one element forms two or more oxides. The oxides vary widely in their nature and properties.
Oxides can be simple (e.g., MgO, Al2O3) or mixed (Pb3O4, Fe3O4). Simple oxides can be classified on the basis of their acidic, basic or amphoteric character. An oxide that combines with water to give an acid is termed acidic oxide (e.g., SO2, Cl2O7, CO2, N2O5 ). For example, SO2 combines with water to give H2SO3, an acid.

\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{H}_{2} \mathrm{SO}_{3}
As a general rule, only non-metal oxides are acidic but oxides of some metals in high oxidation state also have acidic character (e.g., Mn2O7, CrO3, V2O5). The oxides which give a base with water are known as basic oxides (e.g., Na2O, CaO, BaO). For example, CaO combines with water to give Ca(OH)2, a base.

\mathrm{CaO}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Ca}(\mathrm{OH})_{2}
In general, metallic oxides are basic. Some metallic oxides exhibit a dual behaviour. They show characteristics of both acidic as well as basic oxides. Such oxides are known as amphoteric oxides. They react with acids as well as alkalies. For example, Al2O3 reacts with acids as well as alkalies.

\begin{array}{l}{\mathrm{Al}_{2} \mathrm{O}_{3}(\mathrm{s})+6 \mathrm{HCl}(\mathrm{aq})+9 \mathrm{H}_{2} \mathrm{O(l)} \rightarrow 2\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}(\mathrm{aq})+6 \mathrm{Cl}^{-}(\mathrm{aq})} \\ {\mathrm{Al}_{2} \mathrm{O}_{3}(\mathrm{s})+6 \mathrm{NaOH}(\mathrm{aq})+3 \mathrm{H}_{2} \mathrm{O(l)} \rightarrow 2 \mathrm{Na}_{3}\left[\mathrm{Al}(\mathrm{OH})_{6}\right](\mathrm{aq})}\end{array}

There are some oxides which are neither acidic nor basic. Such oxides are known as neutral oxides. Examples of neutral oxides are CO, NO and N2O.

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