EPT - CHEMISTRY - VII

NAME:

ROLLNO:

Two chemicals from which oxygen can be prepared in lab?

• HYDROGEN PEROXIDE
• POTASSIUM CHLORATE
• HYDROGEN PEROXIDE & POTASSIUM CHLORATE
• NONE

Q2. A chemical called oxygenated water.

• a. Manganese dioxide
• b. Hydrogen monoxide
• c. Hydrogen peroxide
• d. None of the above

Q3. By which method oxygen is collected in the laboratory preparation ?

• a. Upward displacement of air.
• b. Upward displacement of water.
• c. Downward displacement of air
• d. Downward displacement of water

Q4. What is the role of manganese dioxide in the laboratory preparation of oxygen ?

• a. Inhibitor
• b. Catalyst
• c. Promotor
• d. None of the above

Q5. Nature of oxygen gas is

• a. Acidic
• b. Amphoteric
• c. Neutral
• d. Basic