Validity of Assumptions

Q. certain amount of an ideal gas contained in a closed vessel . the vessel is moving with cons†an t velocity v , the molecular mass of the gas is M . the rise in temperature when the vessel is suddenly stopped is

Q.

Since molecules undergo frequent collisions with each other in a volume of a gas, they move in straight lines at a constant speed only between one collision and the next. The average distance traversed between successive collisions is called the mean free path, $\lambda$. Among the given options, contemplate and choose the option(s) on which $\lambda$ should not explicitly depend

1. (V : volume)

2. (N: number of particles in a fixed V)

3. (d: diameter of the molecule)

4. (m: mass of the molecules).

Q. 2.What is ideal gas and real gas , its properties and when was discovered, by whom?

Q.

Imagine a gravity free laboratory, in outer space, where you are asked to study the motions of a large number of marbles kept in a transparent cubical jar, as you give the jar quick, small jerks in random directions. You will observe, that after giving a sufficient number of jerks, the marbles start moving rather chaotically, i.e., each marble bounces off other marbles every now and then, and takes a random trajectory between two points due to these collisions. You seem to have given some kinetic energy to each marble, when the jar was being shaken. What happens when you release the jar suddenly, leaving it suspended in space? Assume all collisions between the marbles to be perfectly elastic.

1. The moment you stop shaking and leave the jar it starts moving in a particular direction along a straight line

2. The jar stays still, as all the kinetic energy is now being used only by the marbles inside

3. The jar starts shaking with small, random vibrations

Q. The state of a gas is time dependent.

1. True
2. False

Q. Molar mass of a gas having density 0.164 gL^–1 at 300 K and 190 torr will be

300 K तथा 190 टोर पर 0.164 gL^–1 घनत्व वाली गैस का मोलर द्रव्यमान होगा

1. 20.25 g mol^–1
2. 16.16 g mol^–1
3. 32.12 g mol^–1
4. 26.26 g mol^–1

Q.

Since molecules undergo frequent collisions with each other in a volume of a gas, they move in straight lines at a constant speed only between one collision and the next. The average distance traversed between successive collisions is called the mean free path, $\lambda$. Among the given options, contemplate and choose the option(s) on which $\lambda$ should not explicitly depend

1. $\lambda \propto V$ (V : volume)

2. $\lambda \propto N$ (N: number of particles in a fixed V)

3. $\lambda \propto d$ (d: diameter of the molecule)

4. $\lambda \propto m$ (m: mass of the molecules).

Q.

Objective Types Questions

Fill in the blank spaces:

(i) Carbon dioxide gas is __________ than air. [heavier/lighter].

Q. The mean free path of an ideal gas is constant if?
a) temp increases
b) temp decreases
c) temp constant
​​d) all of these

Q. A gas behaves more closely to an ideal gas at and .

1. Low pressure
2. High pressure
3. Low temperature
4. High temperature