Significance and Applications of Gas Laws

Q. Air is less dense than exhaust from chimneys. Why or why not ?

Q.

Give reasons for the following:
(a) all temperatures in the absolute (Kelving) scale are in positive figures.
(b) Gases have lower density compared to that of solids or liquids.
(c) Gases exert pressure in all directions.
(d) It is necessary to specify the pressure and temperature of a gas while stating its volume.
(e) inflating a balloon seems to violate Boyle's law.
(f) Mountaineers carry oxygen cylinders with theml.
(g) gas fills completely the vessel in which it is kept.

Q.

What is the $k$ value of air?

Q. Explain mesurable
properties of gases

Q. Gases have the strongest inter-particle forces.

1. True
2. False

Q. For a closed (non rigid ) container containing n = 10 moles of an ideal gas fitted with movable , frictionless , weightless piston operating such that pressure of gas remains constant at 0.821 atm . Draw graph representing correct variation of log V Versus log T where V is in litre and T is in Kelvin .

Q. When we are in a very cold place, we see cold air coming out of our mouth. But my doubt is, when the surrounding is so cold, why is the air not in solid or atleast at liquid state?

Q. In May 2016, Phalodi in Rajasthan recorded India's highest-ever temperature of 51 $oC$. What is its reading on Kelvin scale?

1. 324.15

Q.

Why the volume increases when the temperature is increased? and pressure remains constant

Q.

At constant temperature, if the pressure of oxygen gas is to be made twice its original value, then the volume of the gas needs to be ______.