Quiz  /  Robotic Process Automation Class 10 MCQ Questions With Answers

  • 1. 
    What are the total volumes used?

  • 40cm3 of acid, 30cm3 of sodium hydroxide
  • 300cm3 of acid, 400cm3 of sodium hydroxide
  • 400cm3 of acid, 300cm3 of sodium hydroxide
  • 30cm3 of acid, 40cm3 of sodium hydroxide

  • 2. 
    What should the graph look like for this practical?

  • One straight line of best fit
  • A curve of best fit
  • Two straight lines of best fit, that cross over
  • There is no pattern and therefore no line of best fit

  • 3. 
    Why is a polystyrene cup used?

  • It makes the set up more stable
  • It provides some insulation so you measure a more accurate temperature change
  • It allows the thermometer to stand up
  • To keep the solutions as cold as possible

  • 4. 
    What is the dependent variable?

  • Maximum temperature reached after addition of sodium hydroxide
  • Concentration of acid
  • Concentration of sodium hydroxide
  • Volume of sodium hydroxide added

  • 5. 
    What is the correct method for this RPA?

  • Add 5cm3 increments of sodium hydroxide to the acid and measure the final temperature after all of it has been added
  • Measure the acid starting temperature, add 5cm3 increments of sodium hydroxide and measure the final temperature after all of it has been added
  • Add 40cm3 of sodium hydroxide and 30cm3 acid together and measure the temperature at the end
  • Measure the acid starting temperature, add 5cm3 increments of sodium hydroxide and measure the maximum temperature reached after each addition

  • 6. 
    What is the best equipment for measuring temperature changes?

  • Measuring cylinder
  • pH probe
  • Thermometer
  • Polystyrene cup

  • 7. 
    What does endothermic mean?

  • Energy is transferred from reaction to surroundings, in the form of heat
  • Energy is transferred from surroundings to reaction, in the form of heat
  • Energy is transferred from reaction to surroundings, in the form of kinetic energy
  • Energy is transferred from surroundings to reaction, in the form of kinetic energy

  • 8. 
    How could you improve this method?

  • Add more insulation around the polystyrene cup
  • Use a temperature probe with a data logger to get more accurate temperature readings
  • Surround the polystyrene cup with ice to keep it cold
  • Both A & B

  • 9. 
    What must you do before you add the acid and alkali together?

  • Estimate the final volume of the solution
  • Measure the starting temperature of the acid
  • Put a lid on it
  • Add water to the acid

  • 10. 
    What is the independent variable?

  • Maximum temperature reached after addition of sodium hydroxide
  • Concentration of acid
  • Concentration of sodium hydroxide
  • Volume of sodium hydroxide added

  • 11. 
    What does exothermic mean?

  • Energy is transferred from reaction to surroundings, in the form of heat
  • Energy is transferred from surroundings to reaction, in the form of heat
  • Energy is transferred from reaction to surroundings, in the form of kinetic energy
  • Energy is transferred from surroundings to reaction, in the form of kinetic energy
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