Oxidation States and Oxides

Ans : 3.

The chemical symbol for oxygen is 'O', derived from its Latin name 'Oxygenium'. 'Ox' and 'Oy' are not valid chemical symbols for any element.

This option is correct because calcium carbonate when heated, decomposes into calcium oxide and carbon dioxide, which acts as basic as well as acidic oxide.

Ans : 4.

Ans : 1.

Ans : 2.

Sulphur dioxide (SO2) is classified as an acidic oxide because it reacts with water to form sulfurous acid (H2SO3). Acidic oxides are non-metal oxides that form acids when dissolved in water, unlike basic oxides which form bases.

Metal oxides are basic in nature because they react with diluted acids to form salt and water. They also dissolve in water to form metal hydroxides which are alkaline in nature. These metal hydroxides release OH- ions, so they are always basic.

Silver nitrate (AgNO₃) is known as Lunar caustic. The central metal in silver nitrate is nitrogen atom.

• 1 + x + 3(- 2) = 0 x - 5 = 0 x = + 5 Hence, the oxidation state of N atom in silver nitrate is + 5. Only option (5) is correct.

Gold fluoride is the inorganic compound with the formula Au₂F₁₀. This fluoride compound features gold in its highest known oxidation state. This red solid dissolves in hydrogen fluoride but these solutions decompose, liberating fluorine.

Ammonium nitrate, is a white crystalline solid at room temperature and standard pressure. It is commonly used in agriculture as a high-nitrogen fertilizer, and has also been used as an oxidizing agent in explosives, including improvised explosive devices.

Molybdenum trioxide is a chemical compound with the formula MoO₃. It occurs as the rare mineral molybdite. Its chief application is as an oxidation catalyst and as a raw material for the production of molybdenum metal.

This option is correct because when yellow lead monoxide is heated in a current of air to about 340⁰C for several hours, red lead is obtained.

Bromine pentafluoride is an interhalogen compound and a fluoride of bromine. It is a strong fluorination reagent. It is also used as an oxidizer in liquid rocket propellants and as a fluorinating agent in the processing of uranium.

Ozone has the chemical formula O3, which means it contains three oxygen atoms. It is a triatomic molecule and an allotrope of oxygen.