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Class 9
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Study the phenomenon of osmosis
Study the phenomenon of osmosis
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1)
The movement of the solvent molecules of a solution from a region of their higher concentration to the region of their lower concentration through a semi permeable membrane is called:
Dialysis
Osmosis
Diffusion
Reverse osmosis
2)
When the concentration of solutes outside the living cell is lower than inside the cell, then the solution is called as
Isotonic
Hypotonic
Osmotonic
Hypertonic
3)
When the amount of water in a cell is higher than the amount of solute in a cell it is said to be
Hypotonic
Isotonic
Osmotic
Hypertonic
4)
Which piece of apparatus is used to measure the rate of osmosis?
Osmometer
Anemometer
Potometer
Pfeffer Zelle
5)
What does selectively permeable mean?
None of these
The membrane lets allow only large substances to pass through.
The doesn't allow any substances to pass through
The membrane allows some substances and particles to pass in and out of the cell
6)
Why do plant cells become flaccid in concentrated sugar solutions?
They gain water by osmosis
They lose water by osmosis
They lose water by active transport
They take up water through diffusion
7)
If a cell is placed in salt water, the water will:
The cells will get coagulate
Leave the cell and the cytoplasm and cell membrane shrink.
None of these
Enter the cell and the cytoplasm and cell membrane expand.
8)
How is isotonic defined?
When the amount of the solute is higher than the amount of water in a cell.
When the amount of water and solute in a cell are at equilibrium
By active transport
Diffusion of water through a semi-permeable membrane
9)
An egg with a dissolved shell is placed in pure water for 48 hours what will happen?
The egg will lose water and shrink.
Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
All of these
The egg will gain water and swell.
10)
What makes the egg get deshelled when it is placed in dilute HCl?
It dissolves the calcium carbonate present on the surface of cell.
It dissolves the shell by forming calcium chloride.
It releases carbon dioxide gas during reaction.
All of these