Here are 10 one-word answer type questions based on the subtopic “Sieving” from the chapter Separation of Substances in Class 6 NCERT Science, with answers and explanations included:
1. Question: Which method is used to separate particles of different sizes?
Answer: Sieving
Explanation: Sieving separates substances based on particle size using a sieve or mesh.
2. Question: What tool is used in the process of sieving?
Answer: Sieve
Explanation: A sieve with small holes allows only fine particles to pass through during sieving.
3. Question: What type of mixture is separated by sieving—same or different size?
Answer: Different
Explanation: Sieving is effective when the mixture has components of different sizes.
4. Question: Which kitchen ingredient is commonly sieved before use?
Answer: Flour
Explanation: Flour is sieved to remove lumps and impurities like husk or stones.
5. Question: What large impurity can be separated from flour using a sieve?
Answer: Husk
Explanation: Husk is a coarse particle that remains on the sieve while sieving flour.
6. Question: What is the name of the part that passes through the sieve?
Answer: Fine
Explanation: The fine or smaller particles pass through the holes in the sieve.
7. Question: What is removed from sand using sieving at construction sites?
Answer: Pebbles
Explanation: Pebbles and other large particles are separated from sand using large sieves.
8. Question: What type of method is sieving—physical or chemical?
Answer: Physical
Explanation: Sieving is a physical method of separating components without changing their nature.
9. Question: Can sieving separate sugar dissolved in water—Yes or No?
Answer: No
Explanation: Sieving cannot separate substances that are dissolved in water, like sugar.
10. Question: What property of materials is important for sieving to work?
Answer: Size
Explanation: The size difference between components allows effective separation through a sieve.
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