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Recent questions tagged unit5

The rms velocity can be calculated by

asked Mar 2, 2014 by sharmaaparna1

1 answer

At room temperature , the rms speed of molecules of a certain diatomic gas is formed to be 1930 m/Sec . The gas is

asked Mar 2, 2014 by sharmaaparna1

1 answer

Four particles have speed 2,3,4 and 5 cm/sec respectively. Their RMS speed is

asked Mar 2, 2014 by sharmaaparna1

1 answer

Average velocity of the molecules of a gas in a container moving in one dimension is

asked Mar 2, 2014 by sharmaaparna1

1 answer

If P is the pressure of gas, then the kinetic energy per unit volume of the gas is

asked Mar 2, 2014 by sharmaaparna1

1 answer

Densities of air in chandigarh was found to be $1.156kgm^{-3}$. The temperature and pressure were recorded as $20^{\large\circ}C$ and $100.142\; KPa$. The average molecular mass of the air at that place in $g \;mol^{-1}$ is

asked Mar 2, 2014 by sharmaaparna1

1 answer

Assume the centre of sun to consists of gases whose average molecular mass is $2.0\;u$. The density and the pressure of the gas are respectively, $1.3g\;cm^{-3} and\; 1.12\times10^9$ atm. What is the approximate temperature of the Sun?

asked Mar 1, 2014 by sharmaaparna1

1 answer

An LPG cylinder contain 15kg of butane gas at $27^{\large\circ}C$ and 10 bar pressure. The cylinder linked and it was found that after 4 days , the mass of the gas left in cylinder was only 10 kg. How much drop in pressure was occured in each day?

asked Mar 1, 2014 by sharmaaparna1

1 answer

Densities of two gases of same molecular weight are in the ratio 1:2 and their temperature are in the ratio 2:1 then the ratio of their respective pressures is

asked Mar 1, 2014 by sharmaaparna1

1 answer

The density of a gas at STP is 2.68g/L . The gas may be

asked Mar 1, 2014 by sharmaaparna1

1 answer

If the pressure of $N_2/H_2$ mixture in a closed vessel is 100 atm and 20% of the mixture then reacts , the pressure at the same temperature would be

asked Mar 1, 2014 by sharmaaparna1

1 answer

A gas is heated through $1^{\large\circ}C$ in a closed vessel and so the pressure increases by $0.4\%$ . The initial temperature of the gas was

asked Mar 1, 2014 by sharmaaparna1

1 answer

Volume coefficient according to charle's law is

asked Mar 1, 2014 by sharmaaparna1

1 answer

To expel half the mass of air from a large flask at $27^{\large\circ}C$ , it must be heated to

asked Mar 1, 2014 by sharmaaparna1

1 answer

The concentration of $O_2$ and $CO_2$ is variable but on the average , $100\;mL$ blood contains 0.02g of $O_2$ and $0.08\;g$ of $CO_2$. Calculate the Volume of $O_2$ and $CO_2$ at $1\; atm$ and body temperature $37^{\large\circ}C$ assuming $10$ litre blood in human body.

asked Mar 1, 2014 by sharmaaparna1

1 answer

A gas in an open container is heated from $27^{\large\circ}C$ to $127^{\large\circ}C$. The fraction of the original amount of gas remaining in the container will be

asked Feb 28, 2014 by sharmaaparna1

1 answer

Boyle's law may be represented as

asked Feb 28, 2014 by sharmaaparna1

1 answer

Find the co-ordination number of sodium in $Na_2O$.

asked Feb 25, 2014 by sharmaaparna1

0 answers

A compound $AB_x$ is formed such that A atoms are at corners and B atoms at face centre. Find the value of $x$ .

asked Feb 24, 2014 by sharmaaparna1

1 answer

A molecule $A_2B$(mol.weight = 166.4) occupies triclinic lattice with a = 5A , b = 8A and C = 4A . If density of $AB_2$ is $5.2g cm^{-3}$. Calculate the number of molecules present in one unit cell.

asked Feb 24, 2014 by sharmaaparna1

1 answer

A cylinder container with the moveable piston initially hold 3.0 mole of a gas at 8.0 atm pressure and a volume of 5.0 litre. If piston is moved to create a volume 10.0 litre , while simultaneously with drawing 1.5 mole of gas. Calculate the final pressure.

asked Feb 23, 2014 by sharmaaparna1

1 answer

Density of a gas is found to be $5.46g/dm^3$ at $27^{\large\circ}C$ at 2 bar pressure. What will be its density at STP?

asked Feb 23, 2014 by sharmaaparna1

1 answer

A 40 mL of a mixture of $H_2O$ and $O_2$ was placed in a gas burette at $18^{\large\circ}C$ and 1 atm P. A spark was applied so that the form a pure gas had a volume of 10mL at $18^{\large\circ}C$ and 1 atm P . If the remaining gas was $H_2$, what was the initial mole $\%$ of $H_2$ in mixture?

asked Feb 23, 2014 by sharmaaparna1

1 answer

Calculate the percentage of free volume available in 1 mole gaseous water at 1.0atm and $100^{\large\circ}C$. Density of liquid $H_2O$ at $100^{\large\circ}C$ is 0.958 g/mL.

asked Feb 23, 2014 by sharmaaparna1

1 answer

Calculate the average volume available to a molecule in a sample of nitrogen gas at STP. What is the average distance between neighbouring molecules if nitrogen molecules are spherical in nature?

asked Feb 21, 2014 by sharmaaparna1

1 answer

The average speed of an ideal gas molecule at $27^{\large\circ}C$ is 0.3 m/s. Calculate the average speed at $927^{\large\circ}C$

asked Feb 21, 2014 by sharmaaparna1

1 answer

A vertical hollow cylinder of height 1.52m is fitted with a movable piston of negligible mass and thickness. The lower half of the cylinder contains an ideal gas and the upper half is filled with mercury. The cylinder is initially at 300K. When the temperature is raised half of the mercury comes out of the cylinder . Find the temperature assuming the thermal expansion of mercury to be negligible.

asked Feb 21, 2014 by sharmaaparna1

1 answer

An evacuated glass vessel weighs 50.0g when empty 148.0 g when filled with a liquid of density $0.98gmL^{-1}$ and 50.5g when filled with an ideal gas at 760mm Hg of 300K.Determine the molecular weight of the gas.

asked Feb 20, 2014 by sharmaaparna1

1 answer

Two glass bulbs with equal volume are connected by a narrow tube and filled with a gas at $0^{\large\circ}C$ and pressure of $76\;cm\; Hg$ . One of the bulb is then placed in a water bath maintained at $62^{\large\circ}C$. What is the new value of the pressure inside the bulbs? The volume of the connecting tube is negligible.

asked Feb 20, 2014 by sharmaaparna1

1 answer

1.47 litre of a gas is collected over water at $30^{\large\circ}C$ and 744mm of Hg . If the gas weight 1.98g and vapour pressure of water at $30^{\large\circ}C$ is 32mm , What is the molecular weight of gas?

asked Feb 20, 2014 by sharmaaparna1

1 answer

A monoatomic ideal gas undergoes a process in which the ratio of P to V at any instant is constant and equal to unity. The molar heat capacity of gas is:

asked Feb 20, 2014 by sharmaaparna1

1 answer

In Victor Mayers experiment 0.23g of a volatile solute displaced air which measures 112mL at NTP .Calculate the vapour density and molecular weight of substance

asked Feb 20, 2014 by sharmaaparna1

1 answer

3.7 g of a gas at $25^{\large\circ}C$ occupy the same volume as 0.184g of $H_2$ at $17^{\large\circ}C$ at same pressure. What is moleculer weight of gas?

asked Feb 20, 2014 by sharmaaparna1

1 answer

Sulphur Vapour($S_n$) diffuses through a process plug at 0.354 rate of diffusion of $O_2$ gas under similar conditions of P and T. Find the volume of n.

asked Feb 17, 2014 by sharmaaparna1

1 answer

At same temperature two bulbs A and B of equal capacity are filled with He and $SO_2$ respectively. If the pressure in two bulbs is same. Calculate the ratio of rms speed for them.

asked Feb 16, 2014 by sharmaaparna1

1 answer

5.6 litre of an unknown gas at NTP requires 12.5 calorie to raise its temperature by $10^{\large\circ}C$ at constant volume. Calculate the $C_v$ of the gas.

asked Feb 16, 2014 by sharmaaparna1

1 answer

1 litre capacity flask containing $HN_3$ at 1 atm and $25^{\large\circ}C$. A spark is passed through untill all the $HN_3$ is decomposed into $N_2$ and $H_2$. Calculate the pressure of gases left at $25^{\large\circ}$

asked Feb 16, 2014 by sharmaaparna1

1 answer

Calculate the volume occupied by 96g $CH_4$ at 16 atm and $27^{\large\circ}C$.(R = 0.08litre atm $K^{-1}mol^{-1}$.

asked Feb 16, 2014 by sharmaaparna1

1 answer

A container having 3 mole of gas occupies 60 litre at pressure P and temperature T . If 0.2 mole of gas are introduced at same P and T. Find the change in volume.

asked Feb 15, 2014 by sharmaaparna1

1 answer

A certain amount of an ideal gas occupies a volume of $1.0m^3$ at a given temperature and pressure. What would be its volume after reducing its pressure to half the initial value and raising the temperature twice the initial value?

asked Feb 15, 2014 by sharmaaparna1

1 answer

4 litre $C_2H_4(g)$ burns in oxygen at $27^{\large\circ}C$ and 1atm to produce $CO_2(g)$and $H_2O(g)$. Calculate the volume of $CO_2$ formed at $27^{\large\circ}C$ and 4 atm

asked Feb 15, 2014 by sharmaaparna1

1 answer

7g of a gas occupies a volume of 4:1 litre at 300K. If mol weight of gas is 42 , then find the pressure of it.

asked Feb 15, 2014 by sharmaaparna1

1 answer

Calculate the pressure exerted by $10^{23}$ gas molecules each of mass $10^{-22}$ g in a container of volume one litre. The rms speed is $10^5 cm \;sec^{-1}$

asked Feb 15, 2014 by sharmaaparna1

1 answer

A 4:1 molar mixture of He and $CH_4$ is contained in a vessel at 20 bar pressure. Due to a hole in the vessel, the gas mixture leaks out. What is the composition of the mixture effusing out initially?

asked Feb 15, 2014 by sharmaaparna1

1 answer

The relative rates of diffusion of gas B as compared to that of diatomic gas A is 6.5. Find the molecular weight of B if atomic weight of A is 36.

asked Feb 15, 2014 by sharmaaparna1

1 answer

A gaseous mixture of $O_2 and N_2$ are in the ratio of 1:4 by weight . Calculate their ratio of molecules.

asked Feb 14, 2014 by sharmaaparna1

1 answer

Calculate the total pressure in a mixture of 4g $O_2\;and \;2g\;H_2$ confined in a bulb of 1 litre at $0^{\large\circ}C$

asked Feb 14, 2014 by sharmaaparna1

1 answer

Two gases A and B having molecular weights 60 and 45 respectively are enclosed in a vessel . The weight of A is 0.50g and that of B is 0.2g. The total pressure of the mixture is 750mm. Calculate partial pressure of the two gases.

asked Feb 14, 2014 by sharmaaparna1

1 answer

$20\% N_2O_4$ molecules are dissociated in a sample of gas $27^{\large\circ}$ and 760 torr. Calculate the density of the equilibrium mixture.

asked Feb 14, 2014 by sharmaaparna1

1 answer

If $10^{-4} dm^3$ of water is introduced into a $1.0dm^3$ flask to 300K. How many moles of water are in the vapour phase when equilibrium is established? (Given Vapour pressure of $H_2O$ at 300K is 3170 Pa ; $R = 8.314JK^{-1}mol^{-1}$

asked Feb 14, 2014 by sharmaaparna1

1 answer

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