Carbon dioxide and Carbon Monoxide

What is the formula of limestone?

• CaCO₃

• MgCO₃

• MgCO₃.CaCO₃

• Ca(HCO₃)₂

What is the formula of doloomite?

• CaCO₃

• MgCO₃

• MgCO₃.CaCO₃

• Ca(HCO₃)₂

Name the scientist who gave CO₂ the name acid carbonique.

• Joseph Black

• Henry Boyle

• Van Helmont

• Antoine Lavosier

CH₄ + 2 O₂ -------> _____ + _____

• CO₂ + H₂O

• CO₂ + 2H₂O

• 2CO₂ + 2H₂O

• CO + H₂O

Which is the formula of baking soda?

• CaCO₃

• NaHCO₃

• Ca(HCO₃)₂

• CH₃COOH

What is the name given to solid CO₂?

• Dry water

• Dry ice

• Wet Ice

• Carbon dioxide's ice

During lab preparation of CO₂ why dilute sulphuric acid is not used?

• as it is a corrosive acid

• as it is dehydrating

• as it produces insoluble CaSO₄

• as it does not react with CaCO₃

CuCO₃ ^{on heating}------> ____ + ____

• Cu + CO₂

• CuO + CO₂

• CuO + CO

• Cu + CO

Which is the equation for lab preparation of carbon dioxide?

• CaCO₃ + HCl --> CaCl + CO₂

• CaCO₃ + 2HCl --> CaCl₂ + CO₂

• CaCO₃ + 2HCl --> CaCl₂ + H₂O+ CO₂

• CaCO₃ + HCl --> CaCl +H₂O+ CO₂

How is CO₂ gas collected?

• downward displacement of air

• upward displacement of air

• downward displacement of water

• In a gas jar containing KOH