Osmotic pressure is widely used to determine molar masses of proteins and polymers. Two…
Chemistry · Class 12 · CBSE — Solutions
Osmotic pressure is widely used to determine molar masses of proteins and polymers. Two solutions having same osmotic pressure are called isotonic solutions. Water can flow in or out from a substance depending on if it is kept in hypotonic or hypertonic solutions. The direction of the osmosis can be reversed if a pressure larger than osmotic pressure is applied on solution side.
Sea water is desalinated to get fresh water by which of the following methods?
- When pressure more than osmotic pressure is applied pure water is squeezed out of sea water by reverse osmosis.
- When excess pressure is applied on sea water pure water moves in by osmosis.
- Water moves out from sea water due to osmosis.
- Salt is precipitated from sea water when kept undisturbed for sometime.
Answer
(A) When pressure more than osmotic pressure is applied pure water is squeezed out of sea water by reverse osmosis.
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