Avogadro's Law & Gay Lussac's Law

Q.

One gram mole of a gas at STP occupies 22.4L volume. This fact was derived from –

1. Daltion’s theory

2. Avogadro’s hypothesis

3. Berzelius hypothesis

4. None of the above

Q. An open container contains a certain gas and is heated from $27{}^{\circ }C$ to $127{}^{\circ }C$. What mole percentage of the gas escapes from the container?

1. 40%
2. 25%
3. 33%
4. 50%

Q.

How many liters of air (air is 21% oxygen) are required for the combustion of 6.75 L of CH₄? (Assume air and CH₄ are at the same T and P)

1. 69.3 L

2. 64.3 L

3. 72.4L

4. 81.2L

Q.

A cylinder containing cooking gas can withstand a pressure of 15 atm. The pressure gauge of the cylinder indicates 12 atm at ${27}^{\circ }C$. Due to a sudden fire in the building, the temperature starts rising. At what temperature will the cylinder explode?

1. 

2. 

3. 

4. 

Q.

The temperature of a gas placed in an open container is raised from ${27}^{\circ }to{227}^{\circ }C.$ The percent of the original amount of the gas expelled from the container will be ?

1. 20

2. 40

3. 60

4. 80

Q.

0.75 mol of solid X4 and 2 mol of O2 are heated in a closed container to form only one gaseous compound. The ratio of the final pressure at 327∘C to the initial pressure at 27∘C in the flask is?

1. 1.5
2. 0.75
3. 2
4. 1

Q. A gas is present above and below the piston in a cylinder fitted with movable piston having a certain mass. On both sides of the piston there are equal number of moles of gas. The volume above is two times the volume below at a temperature of $300\text{K}$. At what temperature will the volume above be four times the volume below?

1. $600\text{K}$
2. $400\text{K}$
3. $200\text{K}$
4. $120\text{K}$

Q. If $v$ is the volume of one molecule of a gas under given conditions, then van der Waals constant 'b' is : ($N_0$ = Avogadro's number)

1. $4v$
2. $\frac{N_0}{4v}$
3. $\frac{4v}{N_0}$
4. $4v{N}_0$

Q. The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $1:4$. Their ratio of number of molecules is:

1. $1:4$
2. $7:32$
3. $1:8$
4. $3:16$

Q. Four one litre flasks are separately filled with the gases, $O_2,F_2,C{H}_4$ and $C{O}_2$ under the same conditions. The ratio of number of molecules in these gases:

1. $2:2:4:3$
2. $1:1:1:1$
3. $1:2:3:4$
4. $2:2:3:4$