Y9 End of year review quiz

Which of the following reactions is a combustion reaction ? 

• MgCO3 + O2 → MgO + CO2  
• C3H8 + 5O2 → 3CO2 + 4H2O 
  
• 6CO2 + 6H2O → C6H12O6 + 6O2 
• 6CO2 + 6H2O → C6H12O6 + 6O2 

The compounds or elements present at the end of a reaction 

• reactants
• catalyst
• products
• energy 

The compounds and elements that are present at the beginning of a reaction:

• reactants
• catalyst
• products
• energy 

What kind of change is a change of state?

• Physical
• Chemical 

Three alkali metals are...

• calcium, magesium, barium
• lithium, sodium, potassium
• gold, silver, platinum
• aluminium, cobalt, nickel

Which of the following is NOT a mixture? 

• NaCl + H₂O
• C₆H₁₂O₆ + H₂O
• C₆H₁₂O₆
• SiO₂ +H₂O

Which type of mixture is this? 

• Element only
• compounds only
• elements and compounds
• Concoction

Which type of mixture is this?

• Element only
• Compound only
• Element and compound
• Miscellany

Which of the following is a compound?

• sodium
• sea water
• carbon dioxide
• brass

Which of the following is the correct name for MgCl₂?

• magnesium chlorine
• magnesium dichlorine
• magnesium chloride
• magnesium dichloride