Question

question 7. a florist places a bouquet of white carnations in water containing blue dye. after a time, the flowers turn blue. what process helped the carnations to change color? a. formation of covalent bonds between hydrogen and oxygen molecules b. surface tension c. cohesion and adhesion of water molecules d. specific heat

Explanation:

To determine the process that makes the carnations turn blue, we analyze each option:

• Option A: Covalent bonds between H and O in water are within water molecules and don't involve dye movement, so A is incorrect.
• Option B: Surface tension relates to water's surface properties, not dye transport in plants, so B is incorrect.
• Option C: Cohesion (water molecules sticking to each other) and adhesion (water molecules sticking to other surfaces, like xylem in plants) allow water (with dye) to move up the plant. This process (capillary action, driven by cohesion and adhesion) transports the blue - dyed water to the flowers, causing them to turn blue.
• Option D: Specific heat is about water's heat - absorbing capacity, not dye movement, so D is incorrect.

Answer:

C. Cohesion and adhesion of water molecules