Here are 10 one-word answer type questions based on the chapter “Separation of Substances” from the Class 6 NCERT Science textbook, with answers and explanations included:
1. Question: Which method is used to separate stones from rice by hand?
Answer: Handpicking
Explanation: Handpicking is a simple method used to remove large impurities like stones from grains manually.
2. Question: What is the process of beating harvested crops to separate grains called?
Answer: Threshing
Explanation: Threshing is used to separate grains from stalks by beating or using machines.
3. Question: Which method uses wind to separate lighter husk from heavier grain?
Answer: Winnowing
Explanation: Winnowing uses wind or air to blow away lighter materials like husk, leaving the heavier grains behind.
4. Question: What process is used to separate fine flour from larger impurities?
Answer: Sieving
Explanation: Sieving separates particles of different sizes using a sieve.
5. Question: What is the process where heavier particles settle at the bottom of a liquid?
Answer: Sedimentation
Explanation: Sedimentation allows heavier solid particles in a liquid to settle down naturally.
6. Question: What is the process of pouring clear liquid after sedimentation called?
Answer: Decantation
Explanation: Decantation is the careful pouring of the clear upper layer after sedimentation.
7. Question: What method is used to separate tea leaves from tea?
Answer: Filtration
Explanation: Filtration removes solid particles like tea leaves using a strainer or filter paper.
8. Question: Which process converts water into vapour to separate dissolved solids?
Answer: Evaporation
Explanation: Evaporation is used to separate soluble substances like salt by heating the liquid.
9. Question: What remains behind in a container after evaporation of saltwater?
Answer: Salt
Explanation: When saltwater is evaporated, water turns into vapour and salt is left behind.
10. Question: What is the liquid that passes through the filter during filtration called?
Answer: Filtrate
Explanation: The clear liquid collected after filtration is known as the filtrate.
Let me know if you’d like a worksheet combining all chapters or topic-wise MCQs!
