Q. Which of the following are examples of suspensions?

1. Muddy water
2. Milk
3. Chalk powder in water
4. Paint

Select the correct option from the codes given below:
Answer: Only 1, 3 & 4
Notes: Muddy water, chalk powder in water, and paint are suspensions, as their particles settle upon standing and can be filtered. Milk is a colloid, not a suspension, as its particles do not settle and cannot be separated by filtration. Thus, only 1, 3, and 4 are suspensions, while 2 is not.