Diffusion | MCQs

Explanation

Osmosis is the movement of water molecules through a semipermeable membrane from an area of higher water concentration to lower concentration.

It is a vital process in biological systems for maintaining cell balance.

Explanation

Diffusion is a passive process, meaning it does not require energy input.

In diffusion, particles move from an area of higher concentration to an area of lower concentration until they are evenly distributed, without the use of energy.

Explanation

• Hydrogen (H2) is the lightest molecule, with a molecular weight of 2.016 g/mol.
• According to Graham's Law of Diffusion, the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight.
• Therefore, hydrogen diffuses the fastest.

Explanation

• Osmosis is the movement of water molecules from an area of higher water potential (high concentration of water molecules) to an area of lower water potential (low concentration of water molecules) through a selectively permeable membrane.
• This process helps to equalize the concentration of water molecules on both sides of the membrane.

Explanation

• Diffusion is the random movement of particles from a region of higher concentration to a region of lower concentration, resulting in uniform distribution.
• In this case, the ink particles spread out and mix with the water particles, causing the color to disperse throughout the glass.

Explanation

• When you put a drop of ink into water, the molecules of ink are in random motion due to their kinetic energy.
• As they collide with the surrounding water molecules, they transfer their energy and momentum, causing the ink molecules to spread out and move throughout the glass.
• This process is known as diffusion.