Question

answer the following question
1 A rubber band is solid but it can change State.why?
2.How is high compressibility property of gas useful to us .
3. why does food cook faster in pressure cooker ?
4. which property of matter is used helpful in survival of aquatic plants and animals.

Answer 1

• 1 it happens because pressure applied on the band which makes it change the shape when the pressure is realased it comes back to its original position.
• 2 The gases have high compressibility. This property is used in the following situation:
• (1) LPG (liquefied petroleum gas) is a fuel which is made up of petroleum gas. On compressing this petroleum gas it forms liquid.
• (2) Oxygen cylinders in the hospitals have compressed gas filled in it.
• (3) CNG (compressed natural gas) is a natural gas, methane, which is compressed and used as a fuel in vehicles and at home.
• 3 The trapped steam increases the atmospheric pressure inside thecooker by 15 pounds per square inch (psi), or 15 pounds above normal sea-level pressure. At that pressure, the boiling point of water is increased from 212°F to 250°F. This higher temperature is what cooks food faster.
• 4 Property of matter which is helpful in survival of aquatic plants and animals is diffusion.Liquids have the characteristic that solids and gases can diffuse into them which helps in survival of aquatic animals.

Answer 2

• Explanation:
• 1 it happens because pressure applied on the band which makes it change the shape when the pressure is realased it comes back to its original position.
• 2 The gases have high compressibility. This property is used in the following situation:  

(1) LPG (liquefied petroleum gas) is a fuel which is made up of petroleum gas. On compressing this petroleum gas it forms liquid.

(2) Oxygen cylinders in the hospitals have compressed gas filled in it.

(3) CNG (compressed natural gas) is a natural gas, methane, which is compressed and used as a fuel in vehicles and at home.

• 3 The trapped steam increases the atmospheric pressure inside thecooker by 15 pounds per square inch (psi), or 15 pounds above normal sea-level pressure. At that pressure, the boiling point of water is increased from 212°F to 250°F. This higher temperature is what cooks food faster.
• 4 Property of matter which is helpful in survival of aquatic plants and animals is diffusion.Liquids have the characteristic that solids and gases can diffuse into them which helps in survival of aquatic animals.