A mixture of CO and CO2 is found to have a density  1.5 g/litre at 30oC and 730 mm. The composition of the mixture is-

1. CO: 44%; CO2 = 56%

2. CO: 32%; CO2 = 68%

3. CO: 70%; CO2 = 30%

4. CO: 9%; CO2 = 91%

Subtopic:  Gas Laws |
 58%
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A collapsed polythene bag of 30 litre capacity is partially blown up by the addition of 10 litre of N2 at 0.965 atm at 298 K. Subsequently,  enough O2  is pumped into bag so that at 298 K and external pressure of 0.990 atm, the bag contains full 30 litre. The final pressure of O2 in the following experiment is-

1. 0.67 atm

2. 0.52 atm

3. 85 atm

4. 20 atm

Subtopic:  Ideal Gas Law |
 51%
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A 40 mL of a mixture of H2 and O2 was placed in a gas burette at 18 oC and  1 atm pressure. A spark was supplied so that the formation of water was complete . The remaining pure gas had a volume of 10 mL at 18 oC  and 1 atm pressure. If the remaining gas was H2 , what was the initial mole percentage of H2 in the mixture?

1.  25%

2.  50%

3.  35%

4.  75%

Subtopic:  Gas Laws |
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60 mL of a mixture of equal volume of Cl2 and an oxide of chlorine was heated and then cooled back to the original temperature. The resulting gas mixture was found to have volume of 75 ml. On treatment with caustic soda solution, the volume contracted to 15 ml. Assume that all the measurements are made at same T and P. Deduce the simplest formula for oxide of Cl2. The oxide of Cl2 on heating decomposes quantitatively to O2 and Cl2.

(1) ClO

(2) Cl2O

(3) ClO4

(4) Cl2O3

Subtopic:  Ideal Gas Law |
 62%
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For the reaction, N2 O(g)2NO2 (g) + 0.5 O2 (g),

Calculate the mole fraction of N2 O5 (g) decomposed at a constant volume and temperature if the initial pressure is 600 mm Hg and the pressure at any time is 960 mm Hg.  Assume ideal gas behaviour.

(1) 0.4

(2) 0.2

(3) 0.1

(4) 0.5

Subtopic:  Dalton's Law |
 51%
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An underwater bubble with radius of  5 cm at the bottom of tank , where the temperature is 5oC and pressure is 3 atm rises to the surface, where temperature is 25 oC and pressure is 1 atm. What will be the radius of bubble when it reaches to the surface?

(1) 7.4 cm

(2) 4.9 cm

(3) 9.4 cm

(4) 13 cm

Subtopic:  Ideal Gas Law |
 54%
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If density of vapours of a substance of molar mass 18 g/mole at 1 atm pressure and 500 K is

0.36 kg m–3 , then the value of Z for the vapours is-

(R = 0.082 L atm mole K–1)

1. 4150

2. 5041

3. 1.1

4. 0.9

Subtopic:  Ideal Gas Law |
 59%
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Equal amount (mass) of methane and ethane have their total translational kinetic energy in the ratio

3: 1 then their temperatures are in the ratio.

(1) 5 : 8

(2) 45 : 8

(3) 15 : 8

(4) 8 : 5

Subtopic:  Kinetic Theory of Gas |
 57%
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The graph that represents an isobar nRp> 1 is-

1.  

2. 

3. 

4.  

Subtopic:  Ideal Gas Law |
 65%
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For a certain gas which deviates a little from ideal behaviour, the values of density, p

were measured at different values of pressure, P. The plot of P/p on the Y–axis versus P on the X–axis was nonlinear and had an intercept on the Y–axis, which was equal to

(1) RTM

(2) MRT

(3) RT

(4) RTV

Where M = molar mass.

Subtopic:  Ideal Gas Law |
 69%
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