Question

1 vrey short answer
e) What are landfills ?
f) Explain soluble and insoluble substance ?
g) Why does a lump of cotton wool shrink in water?​

Answer 1

Answer:

e) A landfill site, also known as a tip, dump, rubbish dump, garbage dump, or dumping ground, is a site for the disposal of waste materials. Landfill is the oldest and most common form of waste disposal, although the systematic burial of the waste with daily, intermediate and final covers only began in the 1940s.

f) We have a word for substances that form solutions when they are mixed with water. These substances are called soluble substances. Substances that do NOT form solutions when they are mixed with water are called insoluble substances

g) A lump of cotton wool has a lot of air trapped inside the space present in its fibers. When this lump of cotton is immersed in water, all the air is replaced by water. Due to this, the cotton lump shrinks down.

Explanation:

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