At atmospheric pressure, for the movement of water among the adjoining cells A, B and C as represented below, which values of solute potentials (ψs) would be correct?
A
ψs(A)=–6bar,ψs(B)=–8bar,ψs(C)=–2bar
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B
ψs(A)=–8bar,ψs(B)=–3bar,ψs(C)=–2bar
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C
ψs(A)=4bar,ψs(B)=–2bar,ψs(C)=–1bar
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D
ψs(A)=–1bar,ψs(B)=2bar,ψs(C)=5bar
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Solution
The correct option is Bψs(A)=–8bar,ψs(B)=–3bar,ψs(C)=–2bar
At atmospheric pressure, the water potential (ψw) of a solution is equal to the solute potential (ψs) of that solution. Movement of water occurs from its high water potential to its low water potential. Hence, correct option is b.