Classify the following into osmosis/diffusion Swelling up of a raisin on keeping in Spreading of virus on Earthworm dying on coming in contact with common Shrinking of grapes kept in thick sugar Preserving pickles in Spreading of smell of cake being baked throughout the Aquatic animals using oxygen dissolved in water during respiration

1. Osmosis
2. Diffusion
3. Osmosis
4. Osmosis
5. Osmosis
6. Diffusion
7. Diffusion

Explanation:

1. Swelling up of a raisin on keeping in water is osmosis because the concentration of solutes is more outside. Hence, water moves water from higher to lower concentrations through a semipermeable membrane, causing the raisin to swell.

1. Spreading the virus through sneezing is diffusion because the virus enters the air in tiny droplets. They remain suspended for a long time and move here and there in the air from higher to lower
2. Earthworms die on coming in contact with common salt is osmosis because of variations in the concentration of water and solute. When salt is sprinkled on them, their skin gets dried, due to which their body shrinks, and they die.
3. The shrinking of grapes in thick sugar syrup is Osmosis because water will move down from higher to lower concentrations via a semipermeable membrane.
4. The Preserving of pickles in salt is Osmosis because salt helps to remove water from the cells and helps to preserve pickles.
5. The spreading of the smell of cake being baked throughout the house is Diffusion because the particles of cake move from a region of higher concentration to lower concentration through diffusion hence, producing the smell.
6. Aquatic animals using oxygen dissolved in water during respiration is osmosis because fish absorb oxygen from water (high concentration) through gills and skin (semipermeable membrane) to the lower