The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is-

1.  CH4

2.  C2H6

3.  CO2

4.  Xe

Subtopic:  Ideal Gas Law |
 69%
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Two gas bulbs A and B are connected by a tube having a stopcock. Bulb A has a volume of 100 mL and contains hydrogen. After opening the gas from bulb A to the evacuated bulb B, the pressure falls down by 40%. The volume (mL) of B must be

1.  167

2.  67

3.  125

4.  200

Subtopic:  Gas Laws |
 59%
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At 27°C, 500 mL of helium diffuses in 30 minutes. What is the time (in hours) taken for 1000 mL of SO2 to diffuse under same experimental conditions?

1.  240

2.  3

3.  2

4.  4

Subtopic:  Ideal Gas Law |
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Containers A and B have same gases. The pressure, volume and temperature of A are all twice that of B, then the ratio of number of molecules of A and B are

1.  1 : 2

2.  2 :1

3.  1 : 4

4.  3:2 

Subtopic:  Gas Laws |
 75%
From NCERT
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In Haber's process, 30 L of dihydrogen and 30 L of dinitrogen were taken for the reaction which yielded only 50% of the expected product. What is the composition of the gaseous mixture under afore-said conditions in the end?

1.  20 L NH3, 25 L N2, 15 L H2

2.  20 L NH3, 20 L N2, 20 L H2

3.  10 L NH3, 25 L N2, 15 L H2

4.  20 L NH3, 10 L N2, 30 L H2

Subtopic:  Gas Laws |
 63%
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If the rms velocity of a gas at 100 K is 104 cm sec-1, what is the temperature in °C at which the rms velocity will be 3×104 cm sec-1?

1.  900

2.  627

3.  327

4.  1217 

Subtopic:  Molecular Velocity |
 65%
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A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of the hydrocarbons at 20°C are 400 mm Hg for pentane and 120 mm hg for hexane. The mole fraction of pentane in the vapour phase would be

1. 0.200

2. 0.549

3. 0.454

4. 0.478

Subtopic:  Dalton's Law |
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The temperature at which rate of diffusion of N2 would be 1.625 times the rate of diffusion of SO2 at 50°C is : 

1. 110 K

2. 173 K

3. 373 K

4. 273 K

Subtopic:  Molecular Velocity |
 59%
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If Vrms of H2 at 300K is 1.9×103 m/s. What is the value of Vrms of O2 at 1200K?

1. 1.9 ×103

2. 3.8×103 m/s

3. 0.475×103 m/s

4. 0.95×103 m/s

Subtopic:  Molecular Velocity |
 59%
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The average velocity of ideal gas molecules at 27°C is 0.3 m/sec. The average velocity at 927°C will be 

1. 0.6 m/sec

2. 0.3 m/sec

3. 0.9 m/sec

4. 3.0 m/sec

Subtopic:  Molecular Velocity |
 79%
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