EU 3_Nitrogen and Its Compounds Quiz

What percentage of the air is made up of nitrogen?

• 21%

• 78%

• 50%

• 65%

How is nitrogen industrially separated from air?

• By passing it through a filter

• By fractional distillation of liquid air

• By heating the air

• By freezing the air completely

Nitrogen in the air exists in which molecular form?

• N

• N₂

• NO₂

• NH₃

Which chemical process is used to produce ammonia industrially?

• Haber Process

• Fractional Distillation

• Electrolysis

• Ostwald Process

What happens when nitrogen dioxide (NO₂) dissolves in water?

• It forms a basic solution

• It forms an acid solution

• It turns into ammonia

• It produces hydrogen gas

True or False: Nitrogen is very reactive at room temperature.

• True

• False

True or False: Ammonia turns damp red litmus paper blue, showing it is a basic gas.

• True

• False

True or False: Nitrogen can only be produced in a laboratory using ammonium salts.

• True

• False

True or False: Nitric acid is prepared in the laboratory by heating sulfuric acid with potassium nitrate.

• True

• False

True or False: Nitrates decompose into nitrogen gas and oxygen when heated.

• True

• False