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Questions asked by sharmaaparna1
Questions
282
questions
0
answers selected
A spherical balloon of 21cm diameter is to be filled up with $H_2$ at NTP from a cylinder containing the gas at 20 atm at $27^{\large\circ}C$. The cylinder can hold 2.82 litre of water at NTP . Calculate the number of balloons that can be filled up.
jeemain
chemistry
states-of-matter
ideal-gas-equation
unit5
class11
difficult
q164
asked
Mar 31, 2014
1
answer
A gas occupies 300mL at $27^{\large\circ}C$ and 730 mm pressure . What would be its volume at STP?
jeemain
chemistry
states-of-matter
ideal-gas-equation
unit5
class11
difficult
q163
asked
Mar 31, 2014
1
answer
A vessel has nitrogen gas and water vapour at a total pressure of 1 atm . The partial pressure of water vapour is 0.3 atm. When the contents of this vessel are transformed to another vessel having one third of the capacity of original vessel , completely at the same temperature , the total pressure of the system in the new vessel is:
jeemain
chemistry
states-of-matter
ideal-gas-equation
unit5
class11
difficult
q162
asked
Mar 31, 2014
1
answer
The pressure occupied by one mole of $CO_2$ at 273K is ........ (Given a for $CO_2$ = 3.592 $dm^6atmmol^{-2}$). Assume volume occupied by $CO_2$ molecules is negligible.
jeemain
chemistry
states-of-matter
ideal-gas-equation
unit5
class11
difficult
q161
asked
Mar 31, 2014
1
answer
A gas occupies 0.418 litre at 740 mm of Hg and $27^{\large\circ}C$. Calculate its Volume at STP.
jeemain
chemistry
states-of-matter
ideal-gas-equation
unit5
class11
medium
q160
asked
Mar 29, 2014
1
answer
The pressure of the atmosphere is $2\times10^{-6}$ at about 100 mile above the earth and temperature is $-180^{\large\circ}C$ .How many mole are there in 1 mL gas at this altitude?
jeemain
chemistry
states-of-matter
kinetic-molecular-theory-of-gases
unit5
class11
medium
q159
asked
Mar 29, 2014
1
answer
A 20g chunk of dry ice is placed in an empty 0.75 litre wine bottle tightly closed . What would be the final pressure in the bottle after all $CO_2$ has been evaporated and temperature reaches to $25^{\large\circ}C$
jeemain
chemistry
states-of-matter
kinetic-molecular-theory-of-gases
unit5
class11
medium
q158
asked
Mar 29, 2014
1
answer
A gas at $0^{\large\circ}C$ and 1 atm pressure occupies 2.5 litre . What change in temperature would be necessary if the pressure is to be adjusted to 1.5 atm and the gas has been transferred to a 2.0 litre container?
jeemain
chemistry
states-of-matter
kinetic-molecular-theory-of-gases
unit5
class11
medium
q157
asked
Mar 29, 2014
1
answer
5g of ethane are confined in a bulb of 1 litre capacity . The bulb is so weak that it will burst if the pressure exceeds 10 atm. At what temperature will be the pressure of gas reach the bursting value?
jeemain
chemistry
states-of-matter
unit5
class11
medium
q156
asked
Mar 28, 2014
1
answer
Atomic and molecular sizes are of the order of a few Angstrom (1 $\overset{\circ}{A} = 10^{-10}m)$ . Assuming that $N_2$ molecules is spherical in shape with radius $2\times10^{-10}m$ . Calculate the volume of single $N_2$ molecule.
jeemain
chemistry
states-of-matter
kinetic-molecular-theory-of-gases
unit5
class11
medium
q155
asked
Mar 28, 2014
1
answer
Compressibility factor (Z) for $N_2$ at $-50^{\large\circ}C$ and 800atm pressure is 1.95. Calculate mole of $N_2$ gas required to fill a gas cylinder of 100mL capacity under the given conditions.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q154
asked
Mar 26, 2014
1
answer
Calculate molecular diameter of He from its Vander Waal's constant b = 24mL$mol^{-1}$
jeemain
chemistry
states-of-matter
unit5
class11
medium
q153
asked
Mar 26, 2014
1
answer
The best vaccum so far attained in laboratory is $10^{-10}mm$ of Hg. How many molecules of gas remain per $cm^3$ at $20^{\large\circ}C$ in this vaccum?
jeemain
chemistry
states-of-matter
unit5
medium
class11
q152
asked
Mar 26, 2014
1
answer
$O_2$ is collected over water at $20^{\large\circ}C$. The pressure inside shown by the gas is 740 mm of Hg. What is the pressure due to $O_2$ alone if V.P of $H_2O$ is 18 mm at $20^{\large\circ}C$
jeemain
chemistry
states-of-matter
unit5
class11
medium
q151
asked
Mar 26, 2014
1
answer
50 litre of dry $N_2$ is passed through 36g $H_2O$ at $27^{\large\circ}C$. After passage of gas , there is a loss of 1.20g in water . Calculate vapour pressure of water.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q150
asked
Mar 26, 2014
1
answer
$O_2$ is present in one litre flask at a pressure of $7.6\times10^{-10}mm$ of Hg. Calculate the number of $O_2$ molecules at $0^{\large\circ}$C.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q149
asked
Mar 26, 2014
1
answer
A gas occupies one litre under atmosphere pressure. What will be the volume of the same amount of gas under 750mm of Hg at the same temperature?
jeemain
chemistry
states-of-matter
unit5
class11
medium
q148
asked
Mar 26, 2014
1
answer
The surface tension of which of the following liquid is maximum
jeemain
chemistry
states-of-matter
unit5
class11
medium
q147
asked
Mar 9, 2014
1
answer
For a gas $\large\frac{R}{C_v}$$ = 0.67$ the gas may be
jeemain
chemistry
states-of-matter
unit5
class11
medium
q146
asked
Mar 9, 2014
1
answer
The ratio of Boyle's temperature and critical temperature for a gas is
jeemain
chemistry
states-of-matter
unit5
class11
medium
q145
mock
asked
Mar 9, 2014
1
answer
The temperature at which $H_2$ has the same RMS speed (at 1 atm) as that of $O_2$ at NTP is
jeemain
chemistry
states-of-matter
unit5
class11
medium
q144
asked
Mar 9, 2014
1
answer
The Volume occupied by molecules of one mole of gas at NTP , having radius $10^{-8}cm$ is approximately:
jeemain
chemistry
states-of-matter
unit5
class11
medium
q143
asked
Mar 9, 2014
1
answer
The RMS speed of the molecules of diatomic gas is U, when the temperature is doubled , the molecules dissociates into two atoms . The new RMS speed of the atom is
jeemain
chemistry
states-of-matter
unit5
class11
medium
q142
asked
Mar 9, 2014
1
answer
The ratio between the root mean square speed of $H_2$ at 50K and that of $O_2$ at 800K is..
jeemain
chemistry
states-of-matter
unit5
class11
medium
q141
asked
Mar 6, 2014
1
answer
The ratio of average speed of an oxygen molecule to the RMS speed of a nitrogen molecule at the same temperature is :
jeemain
chemistry
states-of-matter
unit5
class11
medium
q140
asked
Mar 6, 2014
1
answer
The average kinetic energy of an ideal gas per molecule in SI units at $25^{\large\circ}C$ will be
jeemain
chemistry
states-of-matter
unit5
class11
medium
q139
asked
Mar 6, 2014
1
answer
The ratio of rates of diffusion of propane and nitrogen (I) oxide at same P and T is
jeemain
chemistry
states-of-matter
unit5
class11
medium
q138
asked
Mar 6, 2014
1
answer
A cylinder was filled with gaseous mixture containing $CO$ and $N_2$ . The ratio of their partial pressure in cylinder are:
jeemain
chemistry
states-of-matter
unit5
class11
medium
q137
asked
Mar 6, 2014
1
answer
Oxygen and cyclopentane at partial pressure of 570 torr and 170 torr respectively are mixed in a gas cylinder . The ratio of the number of moles of cyclopentane to the number of moles of oxygen is:
jeemain
chemistry
states-of-matter
unit5
class11
medium
q136
asked
Mar 6, 2014
1
answer
The volume occupied by 1 mole of gas at 1 bar pressure and 273.15K is.....
chemistry
jeemain
states-of-matter
unit5
class11
medium
q135
asked
Mar 5, 2014
1
answer
A 2.24 litre cylinder containing $O_2$ gas at $27^{\large\circ}C$ and 2 atm is found to develop a leakage was repaired , the pressure dropped to 100cm of Hg at $27^{\large\circ}C$ . The number of moles of gas escaped out during leakage is :
chemistry
jeemain
states-of-matter
unit5
class11
medium
q134
asked
Mar 5, 2014
1
answer
A flask containing 12g of a gas of relative molecular mass 120 at a pressure of 100 atm , was evacuated by means of a pump untill the pressure was 0.01 atm at the same T. Which of the following is the best estimate of the number of molecules left in the flask. $(N_0 = 6\times10^{23} mol^{-1}$)
jeemain
chemistry
states-of-matter
unit5
class11
medium
q133
asked
Mar 5, 2014
1
answer
If $V_0$ is the volume of the given mass of a gas at 273K and pressure P , then according to Charles's law the volume of same mass of gas at $10^{\large\circ}C$ and pressure P will be
jeemain
chemistry
states-of-matter
unit5
class11
medium
q132
asked
Mar 5, 2014
1
answer
A quantity of hydrogen gas occupies a volume of 30.0mL at a certain temperature and pressure. What volume of half of this mass of hydrogen occupy at triple the absolute temperature if the pressure were one-ninth the original gas?
jeemain
chemistry
states-of-matter
unit5
class11
medium
q131
asked
Mar 5, 2014
1
answer
Two separate bulbs contain gas A and gas B. The density of gas A is twice as that of B. The molecular mass of A is $\large\frac{1}{2}$ as that of B. If temperature is constant, the ratio of the pressure of A and B is :
jeemain
chemistry
states-of-matter
unit5
class11
medium
q130
asked
Mar 5, 2014
1
answer
4.0g of argon has pressure P at temperature T K in a vessel . On keeping the sample at $50^{\large\circ}C$ higher temperature 0.8g gas was given out to maintain the pressure P. The original temperature was:
jeemain
chemistry
states-of-matter
unit5
class11
medium
q129
asked
Mar 5, 2014
1
answer
The value of universal gas constant R depends on..
jeemain
chemistry
states-of-matter
unit5
class11
medium
q128
asked
Mar 5, 2014
1
answer
One mole of an ideal monoatomic gas is mixed with 1 mole of an ideal diatomic gas. The molar specific heat of the mixture at constant volume is.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q127
asked
Mar 5, 2014
1
answer
If one mole of a monoatomic gas ($\gamma = \large\frac{5}{3}$) is mixed with one mole of a diatomic gas ($\gamma = \large\frac{7}{5}$) . The value of V for the mixture is :
jeemain
chemistry
states-of-matter
unit5
class11
medium
q126
asked
Mar 5, 2014
1
answer
The joule - Thomson coefficient for a gas is zero at
jeemain
chemistry
states-of-matter
unit5
class11
medium
q125
asked
Mar 3, 2014
1
answer
What is the pressure of 2 mole of ammonia at $27^{\large\circ}C$ when its volume is 5 litre according to Van der Waal's equation? (a = 4.17 b = 0.03711)
chemistry
jeemain
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
medium
q124
asked
Mar 3, 2014
1
answer
A gas obeys the equation of state P(V-b) = RT (The parameter b is a constant). The slope for an isochore will be
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
medium
q123
asked
Mar 3, 2014
1
answer
At low pressure Van der Waal's equation is reduced to $[P+\large\frac{a}{V^2}]V = RT$ The compressibility factor can be given as
jeemain
chemistry
physical-chemistry
class11
states-of-matter
ideal-gas-equation
medium
q122
asked
Mar 3, 2014
1
answer
At high temperature and low pressure , the Van der Waal's equation is reduced to
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
medium
q121
asked
Mar 3, 2014
1
answer
At low pressure , the Van der Waal's equation is written as
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
medium
q120
asked
Mar 3, 2014
1
answer
Under critical conditions , the compressibility factor for a gas is
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
ideal-gas-equation
medium
q119
asked
Mar 3, 2014
1
answer
If $U_{rms} is\; 30 R^{\large\frac{1}{2}}\; at \;27^{\large\circ}$ then the molar mass of the gas in kg is
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
medium
q118
asked
Mar 3, 2014
1
answer
If the absolute temperature of a sample in a fixed volume container is quadrupled then the root mean square speed in the initial state $u_i$ and that in the final stage $u_f$ would be related as:
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
medium
q117
asked
Mar 2, 2014
1
answer
The rms velocity can be calculated by
jeemain
chemistry
physical-chemistry
class11
unit5
states-of-matter
kinetic-molecular-theory-of-gases
medium
q116
asked
Mar 2, 2014
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
jeemain
chemistry
states-of-matter
unit5
class11
medium
q115
asked
Mar 2, 2014
1
answer
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