D. Answer the following in brief. 1. Name any two materials which are i) natural ii) man- made 2. Define the terms a) solubility and b) diffusion with the help of examples. 3. Make a list of opaque and transparent materials present in your home. 4. How can the scent of a perfume spread in each corner of our home? Explain. 5. What is meant by a saturated solution ?
THERE ARE 5 QUESTIONS
Answers
Explanation:
Respiration is part of how cells make energy. Bacteria have two ways of making energy: aerobic respiration which does involve oxygen, and. anaerobic respiration, which does not involve oxygen.
Answer:
1. i sand, wood
ii paper, plastic
2. a) The maximum amount of solute that can dissolve in a known quantity of solvent at a certain temperature is its solubility. EX= Sugar cubes added to a cup of tea or coffee is a common example of a solution. The property which helps sugar molecules to dissolve is known as solubility
b) Diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
EX= Perfume is sprayed in one part of a room, yet soon it diffuses so that you can smell it everywhere.
3. Transparent : Clean glass, water, air.
Opaque : plastic, fabric, rubber
4. (ANS IS IN THE PIC)
5. A solution in which the maximum amount of solvent has been dissolved is called saturated solution
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