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.

Answer / Solution

UNSOLVED

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

Answer / Solution

UNSOLVED

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

Answer / Solution

UNSOLVED

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.

Answer / Solution

UNSOLVED

When oxygen reacts with Sulphur it will form

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

Answer / Solution

UNSOLVED