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Give reasons
a) A gas fills completely the vessel in which it is kept
b) A gas exerts pressure on the walls of the container
c) A wooden table should be called a solid.
d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expert
class 9 chemistry?
a) A gas fills completely the vessel in which it is kept
b) A gas exerts pressure on the walls of the container
c) A wooden table should be called a solid.
d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expert
class 9 chemistry?
Most Upvoted Answer
Give reasonsa) A gas fills completely the vessel in which it is keptb)...
Why a Gas Fills the Vessel Completely
A gas fills the entire volume of the vessel it occupies due to the following reasons:
- Molecular Movement: Gas molecules are in constant, rapid motion. They move in all directions and collide with each other and the walls of the container.
- Low Density: Gases have much lower density compared to solids and liquids, allowing them to expand and occupy any available space.
- Lack of Attractive Forces: The intermolecular forces in gases are negligible, enabling molecules to move freely and spread out evenly.
Why a Gas Exerts Pressure on the Container Walls
Gases exert pressure on the walls of their containers due to:
- Molecular Collisions: Gas molecules collide with the walls of the container. Each collision exerts a small force, and collectively, these forces result in pressure.
- Random Motion: The random motion of gas molecules ensures that pressure is exerted uniformly in all directions.
- Temperature Influence: Increasing the temperature increases the kinetic energy of gas molecules, leading to more frequent and forceful collisions, resulting in higher pressure.
Why a Wooden Table is Considered a Solid
A wooden table is classified as a solid because:
- Definite Shape and Volume: Solids maintain a fixed shape and volume, unlike liquids and gases.
- Tightly Packed Molecules: The molecules in solids are closely packed together, resulting in rigidity and resistance to deformation.
- Low Compressibility: Solids cannot be compressed easily, which is characteristic of solid materials.
Why We Can Move Our Hand in Air Easily
Moving our hand in air is easier than through a solid block of wood because:
- Low Density of Air: Air is much less dense than solid materials, offering less resistance to movement.
- Molecular Spacing: The molecules in the air are far apart, allowing our hand to pass through with minimal interaction.
- Solid Resistance: In contrast, solids have tightly packed molecules that resist movement, requiring significant force (like a karate expert) to break through.
A gas fills the entire volume of the vessel it occupies due to the following reasons:
- Molecular Movement: Gas molecules are in constant, rapid motion. They move in all directions and collide with each other and the walls of the container.
- Low Density: Gases have much lower density compared to solids and liquids, allowing them to expand and occupy any available space.
- Lack of Attractive Forces: The intermolecular forces in gases are negligible, enabling molecules to move freely and spread out evenly.
Why a Gas Exerts Pressure on the Container Walls
Gases exert pressure on the walls of their containers due to:
- Molecular Collisions: Gas molecules collide with the walls of the container. Each collision exerts a small force, and collectively, these forces result in pressure.
- Random Motion: The random motion of gas molecules ensures that pressure is exerted uniformly in all directions.
- Temperature Influence: Increasing the temperature increases the kinetic energy of gas molecules, leading to more frequent and forceful collisions, resulting in higher pressure.
Why a Wooden Table is Considered a Solid
A wooden table is classified as a solid because:
- Definite Shape and Volume: Solids maintain a fixed shape and volume, unlike liquids and gases.
- Tightly Packed Molecules: The molecules in solids are closely packed together, resulting in rigidity and resistance to deformation.
- Low Compressibility: Solids cannot be compressed easily, which is characteristic of solid materials.
Why We Can Move Our Hand in Air Easily
Moving our hand in air is easier than through a solid block of wood because:
- Low Density of Air: Air is much less dense than solid materials, offering less resistance to movement.
- Molecular Spacing: The molecules in the air are far apart, allowing our hand to pass through with minimal interaction.
- Solid Resistance: In contrast, solids have tightly packed molecules that resist movement, requiring significant force (like a karate expert) to break through.
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Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry?
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Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry?.
Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry?.
Solutions for Give reasonsa) A gas fills completely the vessel in which it is keptb) A gas exerts pressure on the walls of the containerc) A wooden table should be called a solid.d) We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expertclass 9 chemistry? in English & in Hindi are available as part of our courses for UPSC.
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