A gas mixture consists of 2 moles of oxygen and 4 moles of a argon at temperature T. Neglecting all vibrational modes, the total internal energy of the system is –

(A) 4RT

(B) 5RT

(C) 15RT

(D) 11RT

Concept Questions :-

Kinetic Theory of Gas
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Difficulty Level:

Given reaction : . Calculate the volume at STP from 48 gm of carbon and excess ${\mathrm{H}}_{2}\mathrm{O}-$

(A) 179.2 lit.

(B) 89.6 lit.

(C) 44.8 lit.

(D) 22.4 lit.

Concept Questions :-

Ideal Gas Law
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Difficulty Level:

Two gases occupy two containers A and B the gas in A, of volume 0.10 ${\mathrm{m}}^{3}$, exerts a pressure of 1.40 MPa and that in B of volume 0.15 ${\mathrm{m}}^{3}$ exerts a pressure 0.7 MPa. The two containers are united by a tube of negligible volume and the gases are allowed to intermingle. Then if the temperature remains constant, the final pressure in the container will be (in MPa)

(A) 0.70

(B) 0.98

(C) 1.40

(D) 210

Concept Questions :-

Ideal Gas Law
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Difficulty Level:

The average molecular weight of air is . At 20ºC, the pressure of air at a height of 6 km is half of that at the sea level. Assuming that air contains minute quantities of hydrogen, at what height the partial pressure of hydrogen would be one fourth of the partial pressure at the sea level ? The temperature may be assumed to be the same.

(A) 172.8 km

(B) 4.8 km

(C) 86.4 km

(D) 9.6 km

Concept Questions :-

Ideal Gas Law
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Difficulty Level:

2.3 grams of a mixture of ${\mathrm{NO}}_{2}$ and ${\mathrm{N}}_{2}{\mathrm{O}}_{4}$ have a pressure of 0.82 atm at temperature, T K and volume, V litres. If $\frac{\mathrm{V}}{\mathrm{T}}=\frac{1}{300}$magnitude, calculate ${{\mathrm{P}}_{\mathrm{NO}}}_{2}.$ Assume that all the ${\mathrm{NO}}_{2}$ was formed ${\mathrm{N}}_{2}{\mathrm{O}}_{4}$.

(A) 0.52 atm

(B) 0.38 atm

(C) 0.19 atm

(D) 0.41 atm

Concept Questions :-

Dalton's Law
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Difficulty Level:

At a certain temperature for which , the density of a gas, in , is , where P is the pressure in atmosphere. The molecular weight of the gas in  is

(A) 25

(B) 50

(C) 75

(D) 10

Concept Questions :-

Ideal Gas Law
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Difficulty Level:

An evacuated glass vessel weighs  when empty,  when filled with a liquid of density  and 50.5 g when filled with an ideal gas at  at . Determine the molar mass or the gas.

(A)

(B)

(C)

(D)

Concept Questions :-

Ideal Gas Law
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The average speed at ${\mathrm{T}}_{1}$ (in kelvin) and the most probable speed at ${\mathrm{T}}_{2}$ (in kelvin) of ${\mathrm{CO}}_{2}$ gas is . Calculate the values of ${\mathrm{T}}_{1}$ and ${\mathrm{T}}_{2}$.

(A) 1682.5 K, 2143.4 K

(B) 1312.5 K, 1243.4 K

(C) 1881.5 K, 2233.4 K

(D) 1712.5 K, 24.13.4 K

Concept Questions :-

Molecular Velocity
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Difficulty Level:

Two flasks of equal volume connected by a narrow tube (of negligible volume) at 27ºC and contain 0.70 mole of ${\mathrm{H}}_{2}$ at 0.5 atm. One of the flasks is then immersed into a hot bath, kept at 127ºC, while the other remains at 27ºC. Calculate the final pressure.

(A) 5.714 atm

(B) 0.5714 atm

(C) 2.5214 atm

(D) 5.5114 atm

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A gas bulb of 1 litre capacity contains  molecules of nitrogen exerting a pressure of . Calculate the root mean square (rms) speed and the temperature of the gas molecules. If the ratio of most probable speed to the root mean square speed is 0.84, calculate the most probable speed for these molecules at this temperature.

(A)

(B)

(C)

(D)