States of Matter

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Q1. What is the primary characteristic of gases compared to solids and liquids? (2023)

Solution:

Gases have high compressibility due to the large spaces between particles, unlike solids and liquids which have definite shape and volume.

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Q2. Which of the following states of matter has a definite volume but no definite shape?

Solution:

Liquids have a definite volume but take the shape of their container.

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Q3. What happens to the particles in a gas when the temperature increases? (2023)

Solution:

As the temperature increases, the kinetic energy of gas particles increases, causing them to move faster.

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Q4. What happens to the pressure of a gas if the volume is decreased while the temperature remains constant?

Solution:

According to Boyle's Law, if the volume decreases and temperature is constant, the pressure increases.

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Q5. Which state of matter has a definite shape and volume? (2017)

Solution:

Solids have a definite shape and volume due to their closely packed particles.

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Q6. Which of the following is an example of a plasma? (2023)

Solution:

Lightning is an example of plasma, which is a state of matter consisting of ionized gas with free electrons.

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Q7. Which of the following is NOT a characteristic of solids? (2023)

Solution:

Solids are not highly compressible; they have a definite shape and volume, and their particles vibrate in fixed positions.

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Q8. Which of the following states of matter has a definite shape?

Solution:

Solids have a definite shape due to closely packed particles that do not move freely.

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Q9. What happens to the particles of a substance when it changes from a solid to a liquid? (2023)

Solution:

When a solid melts into a liquid, the particles gain energy, allowing them to overcome some of the forces holding them in fixed positions.

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Q10. Which of the following states of matter has the highest kinetic energy? (2022)

Solution:

Plasma has the highest kinetic energy as it consists of ionized gases with free-moving charged particles.