The diffusion coefficient of a gas is inversely proportional to the square root of its molar mass. If gas A has a molar mass four times that of gas B, under identical conditions, the diffusion rate of gas A will be:
Twice that of gas B
Half that of gas B
Four times that of gas B
One-fourth that of gas B
Related Questions
Movement of molecules takes place along the concentration gradient in
Simple diffusion
Facilitated diffusion
Active transport
Both 1 and 2
Graham’s law is correlated with
Diffusion
Osmoregupation
Osmosis
Absorption
Which of the following statements are true/false?
I. The positive hydrostatic pressure is called turgor pressure.
II. Wall pressure exerts to prevent the increase of protoplasm size.
III. Diffusion is more rapid in liquids than in gases.
IV. Diffusion of water through a semi-permeable membrane is called imbibition.
V. Osmosis is movement of substance, which takes place along a diffusion gradient
I and II are true, while III, IV and V are false
I and III are true, while II, IV and V are false
I and IV are true, while II, III and V are false
I and IV are true, while II, III and IV are false
What type of material do not diffuse or find it difficult to pass through the membranes?
Hydrophobic substance
Hydrophilic substances
Inorganic solute
Both hydrophilic and hydrophobic substances
Which of the following affects the rate of diffusion?
Concentration gradient
Permeability of the membrane
Temperature and pressure
All of the above
Why the rate of diffusion of a substance along the concentration gradient does not increase continuously, while the concentration difference of the molecules across the membrane increases?
Process of facilitated diffusion need ATP
As concentration difference increases, molecule interfere with one another
100% saturation of carrier protein after some time
Transport proteins must be of channel protein type
Choose, true and false statements from the following and select the correct option from the set (a-d) given below
I. Diffusion is an important process of transport in plants since it is the only means for gaseous movement within the plant body
II. In active transport, pumps are proteins that use energy to carry substance across the cell membrane against concentration gradient
III. In facilitated diffusion, special proteins helps hydrophilic substances to be transported across the membrane
IV. In diffusion, molecules move against concentration gradient in a random manner
V. Facilitated diffusion is faster than active transport
I, II, III and IV
I, II, III are true, while IV and V are false
IV and V are true, while I, II and III are false
Only II, III, IV are true while I and V are false
Read carefully the following statements and choose the right answer from the options given below
I. Diffusion is a slow process and it do not depends upon the living system
II. Usually process of diffusion does not need energy
III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another and from one tissue to another tissue
IV. Diffusion is a rapid process over short distance, but extremely slow over long distances
I and III
I and II
III and IV
I, II, III and IV
Transport proteins of endodermal cells are …A… where a plant adjusts the …B… and …C… of
solutes that reaches the …D…
Choose the correct combination of A-D from the given options
selectively permeable / quantity / type / xylem
impermeable / quantity / type / phloem
fully permeable / size / charge / xylem
selectively permeable / size / charge / cortex
Movement of molecules takes place along the concentration gradient in
Simple diffusion
Facilitated diffusion
Active transport
Both 1 and 2
