When we open a gas tap for a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?

When we open a gas tap for a few seconds, the sound of secaping gas is heard first but the smell of gas comes later. Why?

When we open soda water bottle, a fizz sound is heard

When two molecules of a gas come closer then

When we cool a gas below its condensation point, the KE of its molecules

Hydrous ferrous sulphate crystals are heated in a boiling tube for few seconds. Water droplets are seen in the inner sides of test tube and the colour of the crystals changes. On continuous heating a colourless gas X with smell of burning sulphur is evolved and a residue Y is obtained. Identify the gas X and the residue Y formed.

When a tuning fork of frequency 341 is sounded with another tuning fork, six beats per second are heard. When the second tuning fork is loaded with wax and sounded with the first fork, the number of beats is two per second. The natural frequency of the second tuning fork is

When we place a gas cylinder on a van and the van moves, does the kinetic energy of the molecules increase? Does the temperature increase?

A cylinder containing a gas is lifted from the first floor to the second floor. What is the amount of work done on the gas? What is the amount of work done by the gas? Is the internal energy of the gas increased ? Is the tempreture of the gas increased?

A pipe of length l_(1) , closed at one end is kept in a chamber of gas of density rho_(1) . A second pipe open at both ends is placed in a second chamber of gas of density rho_(2) . The compressibility of both the gases is equal. Calculate the length of the second pipe if frquency of first overtone in both the cases is equal

An ideal monoatomic gas undergoes an expansion from state A to state B following a process which is shown in the indicator diagram. If initially during the expansion, the gas was absorbing heat and later on it was rejecting heat, then what was the volume of the gas when it started rejecting the heat?