Question 14 Marks
Read the following text carefully and answer the questions that follow:
A raw mango placed in concentrated salt solution loses water via osmosis and shrivel into pickle. Wilted flowers revive when placed in fresh water. A carrot that has become limp because of water loss into the atmosphere can be placed into the water making it firm once again. Water will move into its cells through osmosis. When placed in water containing less than 0.9% (mass/volume) salt, blood cells swell due to flow of water in them by osmosis.
i. People taking a lot of salt or salty food suffer from puffiness or edema. What is the reason behind this?
ii. The preservation of meat by salting and of fruits by adding sugar protects against bacterial action. How?
iii. Why the direction of osmosis gets reversed if a pressure larger than the osmotic pressure is applied to the solution side? Write its one application.
OR
iii.What care is generally taken during intravenous injections and why?
A raw mango placed in concentrated salt solution loses water via osmosis and shrivel into pickle. Wilted flowers revive when placed in fresh water. A carrot that has become limp because of water loss into the atmosphere can be placed into the water making it firm once again. Water will move into its cells through osmosis. When placed in water containing less than 0.9% (mass/volume) salt, blood cells swell due to flow of water in them by osmosis.
i. People taking a lot of salt or salty food suffer from puffiness or edema. What is the reason behind this?
ii. The preservation of meat by salting and of fruits by adding sugar protects against bacterial action. How?
iii. Why the direction of osmosis gets reversed if a pressure larger than the osmotic pressure is applied to the solution side? Write its one application.
OR
iii.What care is generally taken during intravenous injections and why?
Answer
View full question & answer→i. People experience water retention in tissue cells and intercellular spaces due to osmosis.
ii. Through the process of osmosis, a bacterium on salted meat or candid fruit loses water, shrivels and dies.
iii. The pure solvent flows out of the solution through the semi permeable membrane due to reverse osmosis. It is used in desalination of sea water.
ii. Through the process of osmosis, a bacterium on salted meat or candid fruit loses water, shrivels and dies.
iii. The pure solvent flows out of the solution through the semi permeable membrane due to reverse osmosis. It is used in desalination of sea water.
