The pressure of 1 gm of an ideal gas A at 27 °C is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at the same temperature, the pressure becomes 3 bar.

The correct relationship between their molecular masses is -

1. MA=MB

2. 4MA=MB

3. MA= 2MB

4. 2MA=MB

Subtopic:  Ideal Gas Law |
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A = $\frac{{\mathrm{pV}}^{2}{\mathrm{T}}^{2}}{\mathrm{n}}$

The SI unit for the quantity A is -

1.

2.

3.

4.

Subtopic:  Introduction to States of Matter |
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 Assertion (A) Critical temperatures for carbon dioxide and methane are 31.1 °C and –81.9 °C  respectively. Reason (R) The intermolecular forces of attraction are stronger in CO2 than CH4

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic:  Liquefaction of Gases & Liquid |
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At 0°C, the density of a certain oxide of a gas at 2 bar is the same as that of dinitrogen at 5 bar.

The molecular mass of the oxide would be -

1. 35 g/mol

2. 45 g/mol

3. 70 g/mol

4. 60 g/mol

Subtopic:  Gas Laws |
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The volume of H2 that would be released when 0.15 g of aluminium reacts at 20 °C and 1 bar pressure with caustic soda is-

1. 225 L

2. 301 mL

3. 156 L

4. 203 mL

Subtopic:  Gas Laws |
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The pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27 °C would be -

$1.$ $8.31$ $×$ ${10}^{4}$ $\mathrm{Pa}$
$2.$ $7.43$ $×$ ${10}^{-4}$ $\mathrm{Pa}$
$3.$ $6.87$ $×$ ${10}^{3}$ $\mathrm{Pa}$
$4.$ $8.31$ $×$ ${10}^{6}$ $\mathrm{Pa}$

Subtopic:  Ideal Gas Law |
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0.5 L of H2 at 0.8 bar and 2.0 L of dioxygen at 0.7 bar are introduced in a 1L vessel at 27°C.

The pressure inside the vessel would be -

1. 3.6 bar

2. 1.8 bar

3. 4.1 bar

4. 0.7 bar

Subtopic:  Gas Laws |
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A student forgot to add the reaction mixture to the round-bottomed flask at 27 °C but instead, he placed the flask on the flame. After a lapse of time, he realized his mistake and using a pyrometer he found the temperature of the flask was 477 °C. The fraction of air that would  expel out would be :

1. 1/3

2. 4/5

3. 3/5

4. 2/3

Subtopic:  Gas Laws |
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The total pressure of a mixture that contains 8 g of O2 and 4 g of H2 confined in a vessel of 1 dm3 at 27°would be -

(R = 0.083 bar dmK-1mol-1)

1. 45.67 bar

2. 56.02 bar

3. 34.67 bar

4. 67.13 bar

Subtopic:  Ideal Gas Law |
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Find the mass of payload of a balloon of radius 10 m, if a mass of 100 kg is filled with helium at 1.66 bar and 27°C temperature.

(Density of air = 1.2 kg m3 and R = 0.083 bar dm3 K1 mol1).

1. 2905 Kg

2. 3811 Kg

3. 2721 Kg

4. 4201 Kg

Subtopic:  Ideal Gas Law |
56%
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