Question

a nitrate which produces oxygen as the only gaseous product​

Answer 1

Answer:

A nitrate which gives off only oxygen when heated. A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. A nitrate which gives off oxygen and nitrogen dioxide when heated.

Answer 2

Answer:

A nitrate that produces oxygen as the only gaseous product​ is Sodium Nitrate (NaNO₃).

Explanation:

Sodium nitrate is a soluble salt made of highly reactive alkali metal i.e sodium (Na).  

When sodium nitrate is heated, it decomposes to give colorless and odorless gas oxygen with the formation of sodium nitrite as,

          2NaNO₃(s)     +       heat       →        2 NaNO₂(s)     +       O₂↑

      (sodium nitrate)                                (sodium nitrite)   (oxygen gas)                  

Sodium nitrate is also prepared:

• By neutralizing nitric acid with sodium carbonate or sodium bicarbonate.
• By neutralizing with sodium hydroxide.

This compound is helpful in:

• Preparation of nitric acids and the preservation of foods.

• As a chemical in laboratories. and industries.

• Manufacturing fertilizers.

• Preparation of explosives.