Classify the following into osmosis/diffusion.
(a) Swelling up of a raisin on keeping in water.
(b) Spreading of virus on sneezing.
(c) Earthworm dying on coming in contact with common salt.
(d) Shrinking of grapes kept in thick sugar syrup.
(e) Preserving pickles in salt (f) Spreading of smell of cake being baked through out the house.
(g) Aquatic animals using oxygen dissolved in water during respiration.

Explain why, osmosis can be considered to be a specieal kind of diffusion. (i) osmosis, and (ii) diffusion : (a) swelling up of a raisin on keeping in water (b) spreading of virus on sneezing (c ) earthworm dying on coming in contact with common salt (d) shrinking of grapes kept in thick sugar syrup (e) preserving of pickles in salt (f) spreading of smell of cake being baked in the kitchen (g) aquatic animals using oxygen dissolved in water during respiration

When common salt is dissolved in water

When common salt is dissolved in water the,

Why common salt is used to preserve certain foods?

Swelling of grapes in water confirms to

Raisins placed in water swell up due to