Question

adhesive forces between water molecules and glass molecules help water rise in the tube against gravity. cohesive forces hold water molecules together as water rises in the tube. water will continue to rise in the tube as long as the adhesive forces are greater than the downward force of gravity. the smaller the diameter of the glass tube, the higher the water will rise.
select the true statements.
strong adhesive forces between water molecules cause water to rise in a capillary tube.
water rises until it reaches the end of a capillary tube.
water rises farther in a narrow glass tube than in a wide glass tube.
water molecules are held together by hydrogen bonds as they rise in a capillary tube.

Explanation:

• Statement 1: Adhesive forces are between water and glass molecules, not between water molecules. So this statement is false.
• Statement 2: Water rises until adhesive forces equal the downward force of gravity (not until it reaches the end of the tube). So this statement is false.
• Statement 3: As per the text “The smaller the diameter of the glass tube, the higher the water will rise”, so water rises farther in a narrow glass tube. This statement is true.
• Statement 4: Cohesive forces (which can be hydrogen - bonds in water) hold water molecules together as they rise. This statement is true.

Answer:

• Third statement: Water rises farther in a narrow glass tube than in a wide glass tube.
• Fourth statement: Water molecules are held together by hydrogen bonds as they rise in a capillary tube.