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Gaseous State · Chemistry · NEET
MCQ (Single Correct Answer)
1
The correct van der Waals equation for 1 mole of a real gas is :
NEET 2023 Manipur
2
The correct option in which the density of argon (Atomic mass = 40) is highest:
NEET 2023 Manipur
3
Which amongst the following options is correct graphical representation of Boyle's law?
NEET 2023
4
Four gas cylinders containing He, N2, CO2 and NH3 gases separately are gradually cooled from a temperature of 500 K. Which gas will liquify first?
(Given Tc in K $$-$$ He : 5.3, N2 : 126, CO2 : 304.1 and NH3 : 405.5)
NEET 2022 Phase 2
5
Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here p = total pressure of gaseous mixture
where pi = partial pressure of ith gas
$${\chi _i}$$ = mole fraction of ith gas in gaseous mixture where $${\chi _i}$$ = mole fraction of ith gas in gaseous mixture
$$p_i^o$$ = pressure of ith gas in pure state
NEET 2022 Phase 1
6
A 10.0 L flask contains 64 g of oxygen at 27$$^\circ$$C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 L bar K$$-$$1 mol$$-$$1)
NEET 2022 Phase 1
7
Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :
NEET 2021
8
Choose the correct option for the total pressure (in atm.) in a mixture of 4g O2 and 2g H2 confined in a total volume of one litre at 0$$^\circ$$C is :
[Given R = 0.082 L atm mol$$-$$1K$$-$$1, T = 273 K]
[Given R = 0.082 L atm mol$$-$$1K$$-$$1, T = 273 K]
NEET 2021
9
A mixture of N2 and Ar gases in a cylinder contains 7g of N2 and 8g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is :
[Use atomic masses (in g mol$$ - $$1) : N = 14, Ar = 40]
[Use atomic masses (in g mol$$ - $$1) : N = 14, Ar = 40]
NEET 2020 Phase 1
10
A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same
conditions. The correct option about the gas and its compressibility factor (Z) is -
NEET 2019
11
The correction factor ‘a’ to the ideal gas
equation corresponds to
NEET 2018
12
Given van der Waals’ constant for NH3
, H2,
O2
and CO2
are respectively 4.17, 0.244, 1.36
and 3.59, which one of the following gases is
most easily liquefied?
NEET 2018
13
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for onehalf of the hydrogen to escape?
NEET 2016 Phase 1
14
A gas such as carbon monoxide would be most likely to obey the ideal gas law at
AIPMT 2015
15
What is the density of N2 gas 227oC and 5.00 atm. pressure? (R = 0.082 L atm K$$-$$1 mol$$-$$1)
NEET 2013 (Karnataka)
16
Maximum deviation from ideal gas is expected from
NEET 2013
17
Equal volumes of two monoatomic gases, A and B at same temperature and pressure are mixed. The ratio of specific heats (Cp/Cv) of the mixture will be
AIPMT 2012 Mains
18
For real gases van der Waals equation is written as
$$\left( {p + {{a{n^2}} \over {{V^2}}}} \right)$$ (V $$-$$ nb) = n RT
where $$a$$ and $$b$$ are van der Waals constants. Two sets of gases are
(I) O2, CO2, H2 and He
(II) CH4. O2 and H2
The gases given in set-I in increasing order of b and gases given in set-II in decreasing order of $$a$$, are arranged below. Select the correct order from the following
$$\left( {p + {{a{n^2}} \over {{V^2}}}} \right)$$ (V $$-$$ nb) = n RT
where $$a$$ and $$b$$ are van der Waals constants. Two sets of gases are
(I) O2, CO2, H2 and He
(II) CH4. O2 and H2
The gases given in set-I in increasing order of b and gases given in set-II in decreasing order of $$a$$, are arranged below. Select the correct order from the following
AIPMT 2012 Mains
19
A certain gas takes three times as long to effuse out as helium. Its molecular mass will be
AIPMT 2012 Mains
20
50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gass A will be
AIPMT 2012 Prelims
21
A bubble of air is underwater at temperature 15oC and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25oC and the pressure is 1.0 bar, what will happen to the volume of the bubble?
AIPMT 2011 Mains
22
In Duma's method of estimation of nitrogen 0.35 g of an organic compound gave 55 mLof nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (aqueous tension at 300 K = 15 mm).
AIPMT 2011 Prelims
23
Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be
AIPMT 2011 Prelims
24
A gaseous mixture was prepared by taking equal mole of CO and N2. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is
AIPMT 2011 Prelims
25
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled ?
AIPMT 2011 Prelims
26
The pressure exerted by 6.0 g of methane gas in a 0.03 m3 vessel at 129oC is (Atomic masses : C = 12.01, H = 1.01 and R = 8.314 J K$$-$$1 mol$$-$$1 )
AIPMT 2010 Mains
27
The energy absorbed by each molecule (A2) of a substance is 4.4 $$ \times $$ 10$$-$$19 J and bond energy per molecule is 4.0 $$ \times $$ 10$$-$$19 J. The kinetic energy of the molecule per atom will be
AIPMT 2009
28
Volume occupied by one molecule of water (density = 1 g cm$$-$$3) is
AIPMT 2008
29
If a gas expands at constant temperature, it indicates that
AIPMT 2008
30
In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of gaseous mixture underthe aforesaid condition in the end ?
AIPMT 2003
31
Van der Waal's real gas, acts as an ideal gas, at which conditions?
AIPMT 2002
32
The beans are cooked earlier in pressure cooker because
AIPMT 2001
33
Which of the following expressions correctly
represents the relationship between the average
molar kinetic energy, KE, of CO and N2 molecules
at the same temperature ?
AIPMT 2000