Question

Which of the following differentiate between diffusion and effusion?

• A. Diffusion is the intermixing of the gas molecules at any direction and effusion is the reverse of diffusion.
• B. Diffusion is the property of the gas molecules and effusion is the property of the gas container only.
• C. Diffusion occurs at any direction, whereas effusion occurs under the potential difference.
• D. Diffusion is the intermixing of the gas molecules due to concentration gradient, whereas effusion is the escaping of gas molecules through the pores without collision.

Answer 1

The correct option is D Diffusion is the intermixing of the gas molecules due to concentration gradient, whereas effusion is the escaping of gas molecules through the pores without collision.

Diffusion is the ability of gas to mix spontaneously and to form a homogenous mixture due to concentration gradient while effusion is a process in which a gas under pressure escape out from a fine hole from high pressure to low pressure without collision.