CW7: Preparation of O2 and CO2 and H2

What is the element symbol for Oxygen?

• O

• CO

• CO2

• Co2

What acid is needed for the preparation of Carbon Dioxide?

• Sulphuric

• Hydrochloric

• Acidic

• Marble

Where is HCl found in the body?

• Liver

• Kidney

• Pancreas

• Stomach

What is the chemical formula for marble chips?

• CACO

• CaCO3

• CaOC3

• caCo2

Which of the following is the chemical formula for preparing oxygen?

• H₂O₂ = 2H₂O + O₂

• H₂O = CO₂ + O₂

• H₂O = CO₂ + HO₂

• H₂O + CO₂ = O₂

What is the chemical symbol for Carbon Dioxide?

• O₂

• CO

• CO₂

• H₂O

What are the products in the preparation of CO2?

• HCl and marble chips

• O2, Water and calcium chloride

• Hydrochloric acid and CaCO3

• Carbon dioxide, water and Calcium chloride

Which pieces of glassware are need to prepare CO₂?

• Conical flask, delivery tube and graduated cylinder

• Beaker

• Test tube and beaker

• Delivery tube and burette

Manganese Dioxide acts as a____________ to break down H2O2

• Enzyme

• Suppressor

• Catalyst

• Molecule

What is Hydrochloric acid mixed with to produce Hydrogen?

• Zinc

• Carbon

• Iron

• Glass