A fan can be used to blow air over the mixture. Since puffed rice is lighter than chana dal, the air from the fan will blow the puffed rice away from the chana dal, which is heavier and will fall back into the container. This method works well because of the difference in weight and aerodynamics between the two components.
NCERT Book Curiosity Science Class 6
How can a fan be used to separate puffed rice from chana dal?
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A fan can be used to separate puffed rice from chana dal by blowing air over the mixture. Since puffed rice is lighter, the airflow will blow it away, while the heavier chana dal will remain in place or fall back into the container. This method exploits the difference in weight between the two to achieve effective separation.
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