Lab Preparation Of O₂ Part 1 Quiz

Lab Preparation Of O₂ Part 1 Quiz takes you into the fascinating journey of how oxygen is made and tested in simple laboratory settings. An interesting piece of trivia is that oxygen was first prepared in a laboratory in the 18th century by heating mercuric oxide, a discovery that completely changed how scientists understood air and combustion. This small step opened the door to modern chemistry. As you explore these oxygen quiz questions, you will notice how substances like potassium chlorate oxygen preparation and the use of manganese dioxide as catalyst are central to the experiments. This oxygen MCQ quiz also touches upon simple facts like why is oxygen collected by downward displacement of water in the laboratory.

Lab Preparation Of O2 Part 1

Which of the following compounds is most commonly used in a school laboratory for the preparation of oxygen gas?

Potassium chlorate

Potassium permanganate

Calcium carbonate

Sodium chloride

What is the function of manganese dioxide (MnO₂ ) in the laboratory preparation of oxygen using potassium chlorate?

It increases the yield of oxygen

It acts as a product

It acts as a reactant

It acts as a catalyst

The decomposition of hydrogen peroxide (H₂O₂) to produce oxygen gas is represented by which balanced chemical equation?

2H₂O₂ → H₂O + 2O₂

2H₂O₂ → 2H₂O + O₂

H₂O₂ → H₂O + O

H₂O₂ → H₂O + O₂

Why is oxygen gas collected by the downward displacement of water in the laboratory?

Because it is heavier than water

Because it is less dense than air

Because it is insoluble or only sparingly soluble in water

Because it is a very soluble gas in water

A student mistakenly heats potassium chlorate without adding manganese dioxide. What is the most likely outcome?

Reaction will proceed at a higher temperature

No reaction will take place at all

The reaction will be much faster and more vigorous

A different gas, such as chlorine, will be produced

Why is the first jar of gas collected usually discarded when preparing oxygen in the laboratory?

It is a highly corrosive mixture of gases

It contains impurities from the reactants

It is mainly composed of the air that was initially in the apparatus

It contains a high concentration of water vapor

Which product is left behind after potassium chlorate decomposes?

Potassium oxide

Potassium chloride

Potassium hydroxide

Potassium

Which of the following is NOT a method for oxygen preparation?

Heating potassium chlorate

Decomposing hydrogen peroxide

Electrolysis of water

Reaction of sodium with water

In the laboratory, what is the appearance of oxygen gas?

Colourless and odourless

Colourless with a sweet smell

Blue and odourless

Yellow and pungent

Which observation indicates the presence of oxygen in a test tube?

Colour change of indicator

Bubbles disappear

Condensation forms

A glowing splint reignites

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Sample Questions from This Quiz

Which of the following compounds is most commonly used in a school laboratory for the preparation of oxygen gas?
What is the function of manganese dioxide (MnO₂ ) in the laboratory preparation of oxygen using potassium chlorate?
The decomposition of hydrogen peroxide (H₂O₂) to produce oxygen gas is represented by which balanced chemical equation?
Why is oxygen gas collected by the downward displacement of water in the laboratory?
A student mistakenly heats potassium chlorate without adding manganese dioxide. What is the most likely outcome?

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