Advertisements
Advertisements
Question
Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?
Solution
The gases which dissolve in water by diffusion are carbon dioxide and oxygen. Carbon dioxide dissolved in water bodies is essential for the survival of the aquatic plants as they use this carbon dioxide to make food by photosynthesis. Oxygen dissolved in water is used by aquatic animals for breathing.
APPEARS IN
RELATED QUESTIONS
The mass per unit volume of a substance is called density.
(density = mass/volume).
Arrange the following in order of increasing density-
air, exhaust from chimneys, honey, water, chalk, cotton and iron.
Give reasons:
A gas fills completely the vessel in which it is kept.
Give reasons:
We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.
Write the full forms of the following
- LPG
- CNG
A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.
Which of the following diffuses fastest and which the slowest?
Solid, Liquid, Gas Give reasons for your answer.
Why do gases diffuse very fast?
Why do gases not have fixed shape?
______ is not affected by gravity.
Comment upon the following:-
shape