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Recent questions tagged unit5

The ratio of the rate of diffusion of helium and methane under identical conditions of pressure and temperature is

asked Feb 14, 2014 by sharmaaparna1

1 answer

The root mean square speed of an ideal gas at constant pressure varies with density d as

asked Feb 13, 2014 by sharmaaparna1

1 answer

At $100^{\large\circ}C$ and 1 atm , if the density of liquid water is 1.0g $cm^{-3}$ and that of water vapour is $0.0006gcm^{-3}$ , then the volume occupied by water molecules in 1 litre of stream at that temperature is :

asked Feb 13, 2014 by sharmaaparna1

1 answer

The rms velocity of hydrogen is $\sqrt7$ times the rms velocity of nitrogen. If T is the temperature of the gas, then

asked Feb 13, 2014 by sharmaaparna1

1 answer

The compressibility of gas is less than unity at S.T.P .Therefore

asked Feb 13, 2014 by sharmaaparna1

1 answer

A gas will approach ideal behaviour at :

asked Feb 13, 2014 by sharmaaparna1

1 answer

According to Graham's law , at a given temperature , the ratio of rates of diffusion $\large\frac{r_A}{r_B}$ of gases A and B is given by:

asked Feb 13, 2014 by sharmaaparna1

1 answer

The Compressibility factor for an ideal gas is

asked Feb 13, 2014 by sharmaaparna1

1 answer

X mL of $H_2$ gas effuses through a hole in a container is 5 Second. The time taken for the effusion of the same Volume of the gas Specified below under identical conditions is

asked Feb 13, 2014 by sharmaaparna1

1 answer

The ratio between the rms Speed of $H_2$ at 50K and that of $O_2$ at 800K is :

asked Feb 12, 2014 by sharmaaparna1

1 answer

In Van der waal's equation of state of the gas law the constant 'b' is a measure of :

asked Feb 12, 2014 by sharmaaparna1

1 answer

As the temperature is raised from $20^{\large\circ}C \;to \;40^{\large\circ}C$ , the average kinetic energy of neon atoms changes by a factor.

asked Feb 12, 2014 by sharmaaparna1

1 answer

According to kinetic theory of gases in an ideal gas between two successive collisions a gas molecule travels:

asked Feb 12, 2014 by sharmaaparna1

1 answer

For an ideal gas , number of moles per litre in terms of its pressure P , gas constant R and temperature T is

asked Feb 12, 2014 by sharmaaparna1

1 answer

Kinetic theory of gases proves

asked Feb 12, 2014 by sharmaaparna1

1 answer

Value of gas Constant R is

asked Feb 12, 2014 by sharmaaparna1

1 answer

Calculate the density of $CO_2\; at \;100^{\large\circ}C$ and 800mm Hg pressure.

asked Feb 12, 2014 by sharmaaparna1

1 answer

Calculate the weight of $CH_4$ in a 9 litre cylinder at 16 atm and $27^{\large\circ}$ (R = 0.08 litre atm $K^{-1}$)

asked Feb 11, 2014 by sharmaaparna1

1 answer

Calculate the temperature at which 28g $N_2$ occupies a volume of 10 litres at 2.46 atm.

asked Feb 11, 2014 by sharmaaparna1

1 answer

Calculate the volume occupied by 7g $N_2$ at $27^{\large\circ}$ and 750mm of Hg.

asked Feb 11, 2014 by sharmaaparna1

1 answer

Adsorption is accompanied by

asked Dec 14, 2013 by mosymeow_1

1 answer

In which one of the following, the dispersed phase is a liquid?

asked Dec 14, 2013 by mosymeow_1

1 answer

Dalda is prepared form oils by

asked Dec 14, 2013 by mosymeow_1

1 answer

Which of the following electrolyte will have maximum flocculation value for $Fe(OH)_3$ sol?

asked Dec 14, 2013 by mosymeow_1

1 answer

An example of autocatalysis is

asked Dec 14, 2013 by mosymeow_1

1 answer

The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged respectively. Which of the following statements is not correct?

asked Dec 14, 2013 by mosymeow_1

1 answer

Identify the gas which is readily adsorbed by activated charcoal

asked Dec 14, 2013 by mosymeow_1

1 answer

Which of the following forms cationic micelles above certain concentration?

asked Dec 14, 2013 by mosymeow_1

2 answers

The volume of gases $H_2, \;CH_4, \;CO_2$ and $NH_3$ absorbed by 1 gm of activated charcoal at 298 K are in the order:

asked Dec 14, 2013 by mosymeow_1

1 answer

Which doesn't cause coagulation of coagulation of colloidal solution?

asked Dec 14, 2013 by mosymeow_1

1 answer

The concentration of electrolyte required to coagulate a given amount of $As_2S_3$ sol. is minimum in the case of:

asked Dec 14, 2013 by mosymeow_1

1 answer

Colloid of which one fo the following can be prepared by electrical dispersion as well as reduction method?

asked Dec 14, 2013 by mosymeow_1

1 answer

Arsenic sulhpide is a negative sol. The reagent with least precipitating power is

asked Dec 14, 2013 by mosymeow_1

1 answer

Milk is a colloid in which a

asked Dec 14, 2013 by mosymeow_1

1 answer

Which one of the following is an example of homogeneous catalysis?

asked Dec 14, 2013 by mosymeow_1

1 answer

The critical micellization concentration(CMC) is

asked Dec 14, 2013 by mosymeow_1

1 answer

The coagulation of $10 cm^3$ of Gold sol is completely preventred by addition of 0.025g of starch to it. The gold number of starch is

asked Dec 14, 2013 by mosymeow_1

1 answer

The ability of ion to bring about coagulation of a given colloidal solution depends upon

asked Dec 14, 2013 by mosymeow_1

1 answer

The stability of the dispersed phase in a lyophobic colloids is due to

asked Dec 14, 2013 by mosymeow_1

1 answer

Which of the following method is not employed for the purification of colloids?

asked Dec 14, 2013 by mosymeow_1

1 answer

In the preparation of AgI sol, the excess of $AgNO_3$ is added to potassium iodide solution. The particles of the sol will acquire

asked Dec 14, 2013 by mosymeow_1

1 answer

Which of the following process best describes the purification of muddy water by addition of alum?

asked Dec 14, 2013 by mosymeow_1

1 answer

A sol has positively charged colloidal particles. Which of the following solutions is required in lowest concentration for coagulation?

asked Dec 14, 2013 by mosymeow_1

1 answer

Hydrophillic colloids are stable due to

asked Dec 14, 2013 by mosymeow_1

1 answer

Point out the incorrect statement

asked Dec 14, 2013 by mosymeow_1

1 answer

Which of the following is not applicable to chemisorption?

asked Dec 14, 2013 by mosymeow_1

1 answer

According to Freundlich adsorption isotherm, which of the following is correct?

asked Dec 14, 2013 by mosymeow_1

1 answer

Which adsorption takes place at low temperature?

asked Dec 14, 2013 by mosymeow_1

1 answer

Pd can adsorb in the space between its atoms, 900 times its volume of hydrogen. This porcess is called

asked Dec 14, 2013 by mosymeow_1

1 answer

Which of the following statements is correct about Langmuir's adsorption?

asked Dec 14, 2013 by mosymeow_1

1 answer

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