Let's go through each question step by step and provide the correct answers with explanations.
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Q.7. Write T or True if the statement is true; write F or False if the statement is false.
1.
When solutions form, the mass of the solute is lost as it disappears into solution.
→
F (False)
Explanation: When a solute dissolves in a solvent to form a solution, the mass of the solute is
not lost—it is still present in the solution, just dispersed at the molecular level. The total mass of the solution equals the mass of the solute plus the mass of the solvent. So, the solute doesn't disappear; it’s just no longer visible.
2.
Solutions are always in liquid form.
→
F (False)
Explanation: Solutions can exist in
all states of matter. For example:
- Liquid: Saltwater (solid dissolved in liquid)
- Gas: Air (a mixture of gases like nitrogen, oxygen, etc.)
- Solid: Alloys like brass (copper and zinc mixed together)
So, solutions are not limited to liquids.
3.
There can be more than one solute in the same solution.
→
T (True)
Explanation: Yes, a solution can contain multiple solutes. For example, seawater contains salt (NaCl), magnesium chloride, calcium sulfate, and other dissolved substances—all acting as solutes in water (the solvent).
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Q.8. What is the substance called that is being dissolved in a solution?
→
b) Solute
Explanation:
-
Solute = the substance that dissolves in the solvent.
-
Solvent = the substance that does the dissolving (usually present in greater amount).
-
Homogeneous = a uniform mixture (like a solution).
-
Heterogeneous = a non-uniform mixture.
So, the correct answer is
b) Solute.
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Q.9. Label the solute and solvent in the following solution (Salt and water).
In the image:
- A spoon is pouring
salt into a beaker of
water.
- The
salt is the substance being dissolved.
- The
water is the liquid doing the dissolving.
So:
-
Top arrow pointing to salt:
Solute
-
Bottom arrow pointing to water:
Solvent
✔ Answer:
- Top box:
Solute
- Bottom box:
Solvent
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✔ Final Answers:
Q.7:
1.
F
2.
F
3.
T
Q.8: b) Solute
Q.9:
- Top label:
Solute
- Bottom label:
Solvent
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Parent Tip: Review the logic above to help your child master the concept of solution worksheet.
