Raisin Water Absorption Experiment

The video tutorial covers an experiment to determine the percentage of water absorbed by raisins. It begins with an introduction and aim, followed by a list of required materials. The procedure involves soaking raisins in water, measuring initial and final weights, and calculating the percentage of water absorbed. Observations include the swelling of raisins and reduced water volume. Calculations are performed to determine the water absorption percentage, and the experiment concludes with an inference that at 308 Kelvin, raisins absorb 50% water.

What is the primary aim of the experiment involving raisins?

• To determine the percentage of water absorbed by raisins

• To measure the temperature change in water

• To find the density of raisins

• To calculate the evaporation rate of water

Which of the following is NOT listed as a required material for the experiment?

• Measuring cylinder

• Thermometer

• Microscope

• Petri dish

What is the initial weight of the raisins used in the experiment?

• 10 grams

• 50 grams

• 30 grams

• 20 grams

How long should the setup remain undisturbed during the experiment?

• 1 hour

• 2 hours

• 3 hours

• 4 hours

What observation is made about the raisins after two hours?

• They dissolve

• They change color

• They shrink

• They swell

What is the final reduced volume of water in the measuring cylinder?

• 45 milliliters

• 37.5 milliliters

• 40 milliliters

• 50 milliliters

What is the formula used to calculate the percentage of water absorbed by the raisins?

• (A + B) / E * 100

• (A - B) / E * 100

• (B - A) / E * 100

• (B + A) / E * 100

What is the temperature in Kelvin at which the percentage of water absorbed is calculated?

• 308 K

• 315 K

• 310 K

• 273 K

What percentage of water is absorbed by the raisins at 308 Kelvin?

• 75%

• 50%

• 35%

• 25%