Question

QUESTION 13

A perfume bottle is opened and soon the odor can be sensed in all parts of the room is an example of simple diffusion.

True

False

The motion of molecules reflects the kinetic energy of molecules.

True

False

Which term best describes a beaker solution of 12% sucrose that holds a dialysis bag filled with tap water?

		a. Hypertonic
		b. Isotonic
		c. Hypotonic

The motion of molecules reflects the potential energy of molecules.

True

False

What happens to a dialysis bag filled with tap water and immersed in a beaker of 12% sucrose?

		a. Stay the same weight
		b. Gain weight
		c. Lose weight

Answer 1

Question 13

A perfume bottle is opened and soon the order can be sensed in all parts of the room is an example of simple diffusion.

Answer: True

Reason: Simple diffusion is a  process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins.

The motion of the molecules reflect the kinetic energy of the molecules.

Answer: True.

Reason :Kinetic energy of an object is the energy that it possesses due to its motion. Hence the motion of molecules reflects the kinetic energy of the molecules.

Which term best describes a beaker solution of 12% sucrose that holds a dialysis bag filled with tap water.

Answer: a. Hypertonic

Reason: 12% sucrose in the beaker solution has higher molecular density when compared to the tap water that is filled in the dialysis bag.

The motion of molecules reflects the potential energy of the molecules.

Answer: False

Reason: potential energy is mechanical energy, stored energy or for energy due to its position. Hence motion of the molecules does not reflect the potential energy of the molecules.

What happens to a dialysis bag filled with tap water and immersed in a beaker of 12 % sucrose?

Answer: b. Gains weight.

Reason: the tap water in the dialysis bag as relative less number of molecules when compared to the the 12% of sucrose present in the beaker. Osmosis is a process by which molecules move from higher concentration to lower concentration through semi permeable membrane. Here the semi permeable membrane is the dialysis bag, and hence the molecules from the 12 % sucrose solution move into the tap water thereby adding to its weight.