The correct process is 

a) add solvent more to dilute a solution 

b) add solute more to dilute a solution 

c) add solute more to concentrate a solution 

d) add solvent more to concentrate a solution 

A) b, d 

B) a, c 

C) b, c 

D) a, d

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1 Answers

Correct option is D) a, d

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