Advertisements
Advertisements
Question
Explain the following giving an example.
Suspension
Advertisements
Solution
- Suspensions are heterogeneous mixtures. The solute particles in this mixture remain suspended throughout the bulk of the medium.
- The particles can be seen with the naked eye. Suspension shows the Tyndall effect. The solute particles settle down when the mixture is left undisturbed.
- This means that suspensions are unstable. Suspensions can be separated by the method of filtration.
- For example, mixtures of chalk powder and water, wheat flour and water.
APPEARS IN
RELATED QUESTIONS
Identify the solutions among the following mixtures.
- Soil
- Sea water
- Air
- Coal
- Soda water
Explain the following giving an example.
Saturated solution
Define the term solution.
Give an example of gas in a liquid.
Give an example of a solid in a liquid.
The teacher instructed three students ‘A’, ‘B’ and ‘C’ respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). ‘A’ dissolved 50g of NaOH in 100 mL of water, ‘B’ dissolved 50g of NaOH in 100g of water while ‘C’ dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?
Name the process associated with the following
A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.
A group of students took an old shoebox and covered it with black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and making another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box as shown in Fig.2.4. They were amazed to see that milk taken in the tumbler was illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it?
(a) Explain why the milk sample was illuminated. Name the phenomenon involved.
(b) The same results were not observed with a salt solution. Explain.
(c) Can you suggest two more solutions that would show the same effect as shown by the milk solution?
Arun has prepared a 0.01% (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions?
______ is the major difference between true solutions, suspensions, and colloids.
