Vitamin C Content in Food Quiz

What is the chemical name for Vitamin C?

• Citric acid

• Ascorbic acid

• Acetic acid

• Lactic acid

Which of the following is a property of ascorbic acid?

• It is a strong oxidising agent

• It is a good reducing agent

• It is a strong acid

• It is a weak base

What is the role of DCPIP in the experiment to determine Vitamin C content?

• It acts as a reducing agent

• It acts as an oxidising agent

• It acts as a solvent

• It acts as a catalyst

What colour change indicates the presence of Vitamin C when using DCPIP?

• Blue to red

• Blue to green

• Blue to colourless

• Blue to yellow

Which apparatus is used to measure out 1 cm³ of DCPIP solution?

• Burette

• Pipette

• Measuring cylinder

• Beaker

Why is it important to keep the shaking time the same for each concentration in the experiment?

• To ensure the solution is mixed properly

• To maintain a control variable

• To speed up the reaction

• To prevent evaporation

What is the purpose of creating a calibration curve in this experiment?

• To measure the temperature of the solution

• To estimate the concentration of Vitamin C in unknown samples

• To determine the pH of the solution

• To calculate the density of the solution

What is the risk associated with handling DCPIP?

• It is flammable

• It is an irritant

• It is explosive

• It is corrosive

What safety equipment should be worn when handling DCPIP?

• Gloves

• Eye protection

• Lab coat

• All of the above

What is the expected trend in the volume of Vitamin C solution required to decolourise DCPIP as the concentration of Vitamin C increases?

• It increases

• It decreases

• It remains constant

• It fluctuates