Q.5 State differences between the following.
1. Acid and Base
2. Physical and Chemical changes
3. Clayey and Sandy soil
4. Weather and Climate
Answers
Answer:
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Explanation:
1. Acid
An acid is a molecule or substance that has a pH value less than 7.0 when it is present in an aqueous solution. An aqueous solution is any solution where water is a solvent. Acids are termed as compounds that donate H+ (hydrogen ion) to another compound known as base.
Base
A base (alkaline) is a molecule or substance that has a pH value higher than 7.0 when present in an aqueous solution. Bases are the exact chemical opposite of acids. In chemistry. They are substances that, in aqueous solution, release hydroxide (OH−) ions.
2. Physical change
1. No new substances with new properties are formed.
2. It can be reversed by simple physical methods.
3. It is temporary change.
4. Energy is neither needed nor produced.
Chemical change
1. New substance with new properties are formed.
2. Change cannot be reversed by simple physical methods.
3. It is permanent change.
4. Energy is either needed or evolved.
3. Clayey Soil
1 The proportion of fine(small) particle is higher.
2 Particles are packed tightly.
3 It can hold a good amount of water.
4 Water can not drain quickly.
5 It is heavy in weight.
6 Less air is trapped between the particles.
7 Good for growing various crops .
Sandy soil
1. The proportion of large particles is higher.
2. Particles are loosely packed.
3. Its ability to retain water is low.
4 . Water can drain quickly.
5 .It is light in weight.
6. More air is trapped between the particles.
7. Not suitable for growing crops.
4. weather refers to short-term changes in the atmosphere.
climate describes what the weather is like over a long period of time in a specific area. Different regions can have different climates.