Question

Q1. What is loading?
Q2. What is a saturated solution?
Q3. Why the water is called a universal solvent?
Q4. What is the difference between filtrate and residue?
Q5. What happens if a saturated solution of a substance and water is a) Heated and b) Cooled
Q6. Why do we need to separate substances from a mixture?
Q7. How will you separate a mixture of sugar and sand?
Q8. Which gas is dissolved in soft drinks?
Q9. State the importance of gases dissolved in water.
Q10. Write the definition of Mixtures, Homogeneous and Heterogeneous mixtures, Condensation, Distillation, and Sublimation giving one example in each definition.

Answer 1

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Q1. What is loading?

Ans: loading is the process in which the particles are loaded with the help of Alum which make the particles heavier and it settels down and it help in quick sedimantation.

Q2. What is a saturated solution?

Ans: A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved.

Q3. Why the water is called a universal solvent?

Ans: Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.

Q4. What is the difference between filtrate and residue?

Ans: The difference between residue and filtrate

is that residue is whatever remains after something else has been removed while filtrate is the liquid or solution that has passed through a filter, and which has been separated from the filtride.

Q6. Why do we need to separate substances from a mixture?

Ans: We have to separate a mixture into its constituents because only pure compounds are useful to us. Mixtures are not of much use.

Q7. How will you separate a mixture of sugar and sand?

Ans: The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.

Q8. Which gas is dissolved in soft drinks?

Ans: carbon dioxide

Q9. State the importance of gases dissolved in water.

Ans: The plants and animals which live in water use the oxygen dissolved in water for respiration. Thus, oxygen gas dissolved in water is very important for the survival of animals and plants that live in water.

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