Question

Why a bottle of perfume on opening, evolves an odour which can be sensed over a long distance ? *

Due to high diffusibility of gases

Due to high compressibility of gases

Due to both of above

No option is correct

​

Answer 1

★ Answer :

The odour of bottle of perfume can be sensed over a long distance due to the high diffusibility of gases... (option A)..

Reason :

Diffusion : Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration.

Gases diffuse rapidly and perfume is a gas ,it diffuses with air and the odour of it reaches our nostrils. Hence we are able to smell the odour from a long distance..

★ Additional Information :

Rate of diffusion is affected by :

→ Temperature : As temperature increases the rate of diffusion in gases increases and decreases with decrease in temperature..

→ Surface area : The rate of diffusion increases with increase in surface area and vice versa...

→ Humidity : The rate of diffusion decreases with increase in humidity and increases with decrease in humidity ... i.e they are inversely proportional.