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Integer Answer Type Questions: States of Matter | JEE Advanced | 35 Years Chapter wise Previous Year Solved Papers for JEE PDF Download
Q.1. At 400 K, the root mean square (rms) speed of a gas X (molecular weight = 40) is equal to the most probable speed of gas Y at 60 K. The molecular weight of the gas Y is (2009)
Ans. 4
Sol.
Given vrms = vmp
⇒ My 
Q.2. To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound (vapour pressure 0.68 atm. at 0°C) are introduced.
Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0°C is close to (2011)
Ans. 7
Sol. PHe = 1 – 0.68 = 0.32 atm, n = 0.1
= 7
Q. 3. The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. The absolute temperature of an ideal gas is increased 4 times and its pressure is increased 2 times. As a result, the diffusion coefficient of this gas increases x times. The value of x is (JEE Adv. 2016)
Ans. 4
Sol. Diffusion coefficient ∝ λ µ
Since 
∴ Diffusion coefficient
Thus 
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FAQs on Integer Answer Type Questions: States of Matter - JEE Advanced - 35 Years Chapter wise Previous Year Solved Papers for JEE
| 1. What are the three states of matter? |  |
Ans. The three states of matter are solids, liquids, and gases. In solids, the particles are closely packed together and have a fixed shape and volume. Liquids have particles that are close together but can move around, giving them a fixed volume but not a fixed shape. Gases have particles that are far apart and can move freely, resulting in no fixed shape or volume.
| 2. What is the difference between a solid and a liquid? | |
Ans. The main difference between a solid and a liquid is the arrangement and movement of particles. In a solid, particles are tightly packed together in a regular pattern, resulting in a fixed shape. In a liquid, the particles are still close together but can move past each other, allowing them to take the shape of their container.
| 3. How does a substance change from a solid to a liquid? | |
Ans. When a substance changes from a solid to a liquid, it undergoes a process called melting. This occurs when the temperature of the solid is raised to its melting point, which is the specific temperature at which the solid changes into a liquid. The heat energy added to the solid increases the kinetic energy of its particles, causing them to vibrate more vigorously and eventually break free from their fixed positions, resulting in a liquid form.
| 4. What causes a substance to change from a liquid to a gas? | |
Ans. The change of a substance from a liquid to a gas is known as vaporization. Vaporization occurs when the temperature of the liquid reaches its boiling point, which is the specific temperature at which the liquid changes into a gas throughout its volume. This process requires the addition of heat energy, which increases the kinetic energy of the liquid particles. As the particles gain enough energy, they overcome the attractive forces holding them together and escape into the gas phase.
| 5. How does pressure affect the states of matter? | |
Ans. Pressure can have a significant impact on the states of matter. In general, increasing pressure tends to compress a substance, making its particles come closer together. This compression can cause a gas to transform into a liquid or a liquid to transform into a solid. Conversely, decreasing pressure can cause a substance to expand, resulting in a gas transforming into a liquid or a liquid transforming into a gas. The effects of pressure on the states of matter are evident in phenomena such as condensation, evaporation, and sublimation.
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