Q.1
In the following reaction which are the products Mg + 2HCl → H + MgCl ?
  • Hydrochloric acid and magnesium chloride
  • Hydrogen and magnesium chloride
  • Magnesium and hydrochloric acid
  • Magnesium and hydrogen
Q.2
2H SO means 2 molecules of sulphuric acid. They contain .......
  • 2 hydrogen atoms, 1 sulfur atom, 4 oxygen atoms
  • 4 hydrogen atoms, 1 sulfur atom, 4 oxygen atoms
  • 4 hydrogen atoms, 2 sulfur atoms, 8 oxygen atoms
  • 4 hydrogen atoms, 4 sulfur atoms, 8 oxygen atoms
Q.3
When zinc carbonate reacts with dilute hydrochloric acid the products are .......
  • carbon dioxide, water
  • zinc chloride, carbon dioxide
  • zinc chloride, carbon dioxide, water
  • zinc sulfate, carbon dioxide, water
Q.4
The formula for potassium nitrate is KNO . This means .......
  • 1 potassium atom, 1 nitrogen atom, 3 oxygen atoms
  • 1 potassium atom, 3 nitrogen atoms, 3 oxygen atoms
  • 3 potassium atoms, 3 nitrogen atoms, 3 oxygen atoms
  • 3 potassium atoms, 3 nitrogen atoms, 9 oxygen atoms
Q.5
Which of the following is the correct balanced equation?
  • 2 Cu + O2 → Cu2O2
  • 2 Cu + O2 → 2 CuO
  • Cu + O → CuO
  • Cu + O2 → CuO2
Q.6
Which of the following metals do NOT react with water or steam?
  • Aluminium
  • Copper
  • Tin
  • Zinc
Q.7
The formula for calcium hydroxide is Ca(OH) . This means .......
  • 1 calcium atom, 1 oxygen atom, 2 hydrogen atoms
  • 1 calcium atom, 2 oxygen atoms, 1 hydrogen atom
  • 1 calcium atom, 2 oxygen atoms, 2 hydrogen atoms
  • 2 calcium atoms, 2 oxygen atoms, 2 hydrogen atoms
Q.8
The formula for copper nitrate is Cu(NO ) . This means .......
  • 1 copper atom, 1 nitrogen atom, 6 oxygen atoms
  • 1 copper atom, 2 nitrogen atoms, 3 oxygen atoms
  • 1 copper atom, 2 nitrogen atoms, 6 oxygen atoms
  • 2 copper atoms, 2 nitrogen atoms, 6 oxygen atoms
Q.9
Which of the following metals is the most reactive with acids?
  • Aluminium
  • Iron
  • Magnesium
  • Zinc
Q.10
During a chemical reaction new substances are formed from old ones. Which of the following is NOT true?
  • New substances can be changed back to the original ones
  • The total mass of products = total mass of reactants
  • There is often a color change
  • There is often a temperature change
0 h : 0 m : 1 s