Lab Preparation Of O₂ Part 2 Quiz

Lab Preparation Of O₂ Part 2 Quiz takes you into the fascinating world of oxygen gas preparation and its role in chemistry. A curious fact about oxygen is that it was once called “dephlogisticated air” by Joseph Priestley when he first isolated it. At the time, the phlogiston theory suggested that all combustible materials contained a fire-like element called phlogiston, which was released during burning. Priestley believed oxygen’s role was simply to absorb this phlogiston, so he named it accordingly. It was only later, thanks to Antoine Lavoisier, that the outdated theory was discarded and the element was correctly understood as essential for combustion and life itself. This quiz uses simple examples from oxygen chemistry quiz topics such as dry oxygen preparation and the role of an oxygen drying agent.

Lab Preparation Of O2 Part 2

At what approximate temperature does potassium chlorate decompose in the presence of manganese dioxide?

100 °C

200 °C

300 °C

500 °C

Which other compound besides potassium chlorate can be used for laboratory preparation of oxygen?

Calcium carbonate

Barium hydroxide

Sodium sulphate

Potassium nitrate

Which of the following is the correct equation for decomposition of potassium nitrate?

2KNO₃ → 2KNO₂ + O₂

2KNO₃ → 2K + N₂ + 3O₂

KNO₃ → KNO₂ + O₂

2KNO₃ → 2KNO₂ + 2O₂

Oxygen prepared in the laboratory is:

Dry and pure

Moist and impure

Moist and pure

Dry and impure

Which gas is evolved during decomposition of lead nitrate instead of pure oxygen?

Nitrogen dioxide

Nitrous oxide

Oxygen only

Chlorine

Why is oxygen not collected by downward displacement of air?

Because it is insoluble in water

Because it reacts with nitrogen

Because it forms ozone

Because its density is close to air

Which is the drying agent used for oxygen if dry oxygen is required?

Water

Calcium chloride

Sodium hydroxide

Potassium permanganate

What type of reaction is production of oxygen by heating Potassium Chlorate?

Combination reaction

Double displacement reaction

Redox reaction

Decomposition reaction

Which drying agent cannot be used for oxygen gas?

Alkaline pyrogallol

Phosphorus pentoxide

Anhydrous calcium chloride

Concentrated sulphuric acid

Which catalyst can replace manganese dioxide in the decomposition of hydrogen peroxide?

Zinc

Lead

Platinum

Aluminium

Your score is

The average score is 20%

Sample Questions from This Quiz

At what approximate temperature does potassium chlorate decompose in the presence of manganese dioxide?
Which other compound besides potassium chlorate can be used for laboratory preparation of oxygen?
Which gas is evolved during decomposition of lead nitrate instead of pure oxygen?
Why is oxygen not collected by downward displacement of air?
Which is the drying agent used for oxygen if dry oxygen is required?

Try the full quiz and see how many of these you can answer!