Oxygen questions | form two Chemistry

1. Draw a well labeled diagram for the preparation of Oxygen gas in the laboratory using KClO₃ and MnO₂ ..
2. What is the importance of MnO₂ in the reaction above?
3. Oxygen is collected by downwards displacement of water.Briefly explain why this method is used.

Write the reaction equation for the preparation of oxygen by decomposition of hydrogen peroxide by using manganese IV oxide as a catalyst.

Which of the following sets of processes represent uses of oxygen gas

1. Welding , Ice melting, Magnitization
2. Moutaineering, sublimation, freezing
3. Glass cutting, desiccation, welding
4. Diving, welding, Mountaineering

You are required to demonstrate one of the chemical properties of oxygen.You are provided with four gas jars of oxygen and four pieces of elements named (A, B, C and D), they are sodium, magnesium, carbon and sulphur.

Procedure:

The elements are placed in deflagrating spoon and inserted in the gas jars of oxygen one after the other.

Observation:

Element A + Oxygen ⇒ it burns with a bright white flame leaving a white powder.

Element B + Oxygen ⇒ it burns vigorously with a yellow flame leaving a pale yellow solid.

Element C+ Oxygen ⇒ it melts and burns with a blue flame giving a misty (white gas).

Element D+ Oxygen ⇒ it burns slowly with yellowish white flame giving a colourless  gas.

1. Identify the elements A, B, C and D.
2. Name the products formed after the elements A, B, C and D burned in oxygen.
3. Classify the elements A, B, C and D into metals and non metals.

When oxygen reacts with Sulphur it will form

1. Basic oxide
2. Neutral oxide
3. Amphoteric oxide
4. Acid oxide

Oxygen reacts with non-metals to form  ____ oxide and when it reacts with metals it forms  __ oxide.

1. Draw a well labeled diagram of laboratory preparation of oxygen from decomposition of hydrogen peroxide on the presence of manganese(IV) oxide and label each type of material used.
2. Explain the function of manganese in this reaction.

Oxygen gas can be produced at a large scale by

1. condensation of air.
2. condensation of liquefied air.
3. liquefaction of steam.
4. Fractional distillation of liquefied air.
5. evaporation of liquefied air.