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Chemistry Practice for PT

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  • What is a solvent?
    the liquid part of the solution
  • What do we call the ingredients in chemical reactions?
    reactants
  • Which process is faster? evaporation or boiling?
    boiling
  • Why increasing the temperature of the solvent can increase the rate of dissolving?
    The water particle has more energy and move faster, enable to break up the solute particle more easily
  • Why empty gas can is lighter than the full gas can?
    Because gas has mass
  • Which process happens at the whole body of the liquid? boiling or evaporation?
    boiling
  • What property of matter describe how well a substance can pass through heat?
    Thermal Conductivity
  • What are the 3 evidence of chemical reaction?
    Gas is being produced, change in colour, change in odor, change in temperature
  • What property of matter describe how well a substance pass through electricity?
    Electrical Conductivity
  • What do we call the new substance that is produced during chemical reaction?
    products
  • Why do cables coated in plastic??
    Plastic is electrical insulators, it will not pass the electricity to you
  • What is solute?
    The solid in a solution
  • What is boiling point?
    The temperature at which the liquid turns into gas