Here are 10 one-word answer type questions based on the subtopic “Soluble or Insoluble?” from the chapter Sorting Materials into Groups in Class 6 NCERT Science, with answers and explanations included:
1. Question: What do we call substances that completely dissolve in water?
Answer: Soluble
Explanation: Substances like salt and sugar that disappear in water are called soluble.
2. Question: What do we call substances that do not dissolve in water?
Answer: Insoluble
Explanation: Substances like sand and chalk powder that remain undissolved are insoluble.
3. Question: Which white substance commonly used in food is soluble in water?
Answer: Sugar
Explanation: Sugar dissolves completely in water, making it a soluble substance.
4. Question: Which substance used in construction does not dissolve in water?
Answer: Sand
Explanation: Sand remains at the bottom when mixed with water, so it is insoluble.
5. Question: What is the term for mixing a substance in a liquid to make a solution?
Answer: Dissolve
Explanation: When a substance disappears into a liquid like water, it is said to dissolve.
6. Question: Which powdery white substance from classroom use is insoluble?
Answer: Chalk
Explanation: Chalk powder does not dissolve in water and settles down, so it is insoluble.
7. Question: Which kitchen salt dissolves in water during cooking?
Answer: Salt
Explanation: Common salt dissolves quickly in water, showing it is soluble.
8. Question: What happens to an insoluble substance in water—float or settle?
Answer: Settle
Explanation: Insoluble substances like soil or chalk usually settle at the bottom of the container.
9. Question: What do you call water after a soluble substance has been added to it?
Answer: Solution
Explanation: When a soluble substance like sugar dissolves in water, it forms a solution.
10. Question: What is added to muddy water to separate insoluble particles?
Answer: Sedimentation
Explanation: Sedimentation is the process of allowing insoluble particles to settle in water.
Let me know if you’d like to do the next set on “Objects may float or sink in water” or “Transparency” next!
