Question

Difference between :-
• Solid state
• Liquid state
• Gaseous state
• Change of State of Matter

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Answer 1

(i) Solid state

Characteristics of solid states are:

(a) Have definite shape.

(b) Have destrict boundaries.

(c) Have rigidity and incompressibility.

(d) Have definite volume.

• We can compress sponge as its pores are filled with air but it is solid.

• Salt and sugar take the shape of the container in which they are placed but shape of their crystals do not change, so they are solids.

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(ii) Liquid state

The characteristics of liquid state are:

(a) Have fluidity i.e., they are not rigid.

(b) Low compressibility.

(c) No definite shape and boundaries. They take the shape of the vessels.

(d) Have definite volume.

• Force of attraction between the particles of liquid keeps its volume same.

• Liquids are substances having fixed (definite) volume and no fixed shape. They took the shape of the container in which they are stored.

• The gases (Oxygen and carbon dioxide) from the atmosphere diffuse and dissolve in water. Due to these gases are aquatic plants and animals are able to survive. Diffusion is much more liquids in liquids than in solids due to free movement of particles of liquids.

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(iii) Gaseous state

The characteristics of gaseous state are:

(a) Have fluidity.

(b) Have high compressibility.

(c) Have no definite boundaries.

(d) Have no definite volume.

• The particles in a gas are free to move in any direction hence gases can flow.

• Gases are substance that do not have fixed volume and occupy all the volume available to them.

• Pressure of gas is the force applied on the was a vessel by the irregular moving as particles.

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$\underline{\bf{Change~of~State~of~Matter :}}$

• Water can exist in three state of matter i.e., ${\bf{Solid~-~ice}}$, ${\bf{liquid~-~water}}$, ${\bf{gas~-~water~vapour}}$.

• On heating ice melts into water and then convert into water vapours.

Answer 2

Answer:

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Explanation:

Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. ... The resulting pressure and heat turned the plants into the substance we call coal..

Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. ... The resulting pressure and heat turned the plants into the substance we call coal..