PauCIS ULU
B. Answer the following in not more than 40 words.
2. What is the difference between vapours and gases?
3. Name three metals. Mention three characteristics of metals.
4. Name three nonmetals. Mention three characteristics of nonmetals.
5. What are homogeneous and heterogeneous substances? Mention two examples of each.
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1. How do solids, liquids and gases differ from one another in respect of volume and shape?
Answers
Answer:
ppt presentation of 10
Answer:
2. Vapor is a mixture of two or more different phases at room temperature, these phases are liquid and gaseous phase. Gas usually contains a single thermodynamic state at room temperature. ... Gases are a state of matter. Vapor is usually formed of a substance above its boiling point temperature.
3.Three characteristics of metals are their good conductivity, malleability, and shiny appearance. Metals are good conductors of heat and electricity.
4.They are electron receiving elements that is they are electronegative.
Their oxides are acidic in nature.
They are generally solids or gases in room temperature (exception bromine it is in liquid state) .
They are bad conductors of heat and electricity (except carbon in form of graphite).
5.Through combining two or more substances, a mixture is produced. A homogeneous solution tends to be identical, no matter how you sample it. Homogeneous mixtures are sources of water, saline solution, some alloys, and bitumen. Sand, oil and water, and chicken noodle soup are examples of heterogeneous mixtures.
Q.1
Answer: Solids have a fixed shape and occupy a fixed volume.
Liquids, because they flow, can occupy whatever shape their container has, so they do not have a fixed shape. Because the particles in liquids are very close together (barely further apart than in solids) liquids do not easily compress, so their volume is fixed.
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