NEET PYQ States of Matter - Chapter-wise Questions with Solutions

About States of Matter PYQs

States of Matter has 414 previous year questions in the Quantrex Academy NEET UG Chemistry bank. The 220 questions in this list come from NEET (167), AIIMS (25), JIPMER (18) and 1 other source, spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET States of Matter PYQs with Solutions

About States of Matter PYQs

Questions by year (this list)

States of Matter questions with solutions

A steel cylinder of 8 litres capacity contain hydrogen gas at 12\ atm pressure, At same temperature, how many cycle tubes of 4 litre capacity at 2\ atmphere can be filled up with

The volume occupied by a given mass of gas at 298 K is 35 mL at 1 atmospheric pressure. Calculate the volume of the gas if pressure is decreased to 0.75 atmosphere at constant

A bubble of air is underwater at temperature 15\ ^ ^ ∘ C and the pressure 1.5\ bar . If the bubble rises to the surface where the temperature is 25\ ^ ^ ∘ C and the pressure is

Calculate the work done terms of dm^3 bar when 200 ml of ethylene gas and 150 ml of HCl gas were allowed to react at 1 bar pressure.

A force of 450 N acts on a surface area of 15 cm^2. Find the pressure exerted.

Calculate the pressure in atm of 48 g oxygen gas in a 2\ dm^3 container at 27\ ^ ^ ∘ C . [ R = 0.0821\ atm dm^3\ ^ -1 \ mol^ -1 ]

Identify false statement about real gas from following.

Find the number of molecules in 0.25\ m^3 of the gas at a pressure 2.0 × 10^2\ kPa and a temperature 300\ K . [R = 8.314\ J K^ -1 mol^ -1 ]

Which of the following relations is correct regarding rate of diffusion of a gas?

The density of a gas at 27^ ^ ∘ C and 1 atm pressure is 2.6\ g/dm^3 . What is molar mass of gas? [R = 0.0821\ L atm K^ -1 mol^ -1 ]

Which amongst the following options is correct graphical representation of Boyle&#39;s Law?

The correct option in which the density of argon (Atomic mass =40 ) is highest

The correct van der Waals equation for 1 mole of a real gas is

Four gas cylinders containing He, N_2, CO_2 and NH_3 gases separately are graudally cooled from a temperature of 500 ~K . Which gas will liquify first ? (Given T_ C in K-He: 5.3

A vessel contains 3.2 ~g of dioxygen gas at STP (273.15 K and 1 atm pressure). The gas is now transferred to another vessel at constant temperature, where pressure becomes one

A 10 . 0L flask contains 64g of oxygen at 27 ° C . (Assume O _ 2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0 . 0831Lbar K ^ - 1 mol ^ - 1 )

Which one is not correct mathematical equation for Dalton&#39;s Law of partial pressure? Here P = total pressure of gaseous mixture

Choose the correct option for graphical representation of Boyle&#39;s law, which shows a graph of pressure vs. volume of a gas at different temperatures:

Choose the correct option for the total pressure (in atm.) in a mixture of 4g O _ 2 and 2g H _ 2 confined in a total volume of one litre at 0 ° C is [Given R = 0 . 082Latm mol ^

The minimum pressure required to compress 600 dm ^ 3 of a gas at 1 bar to 150 dm ^ 3 at 40 ° C is

A mixture of N _ 2 and Ar gases in a cylinder contains 7g of N _ 2 and 8g of Ar . If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure

Assertion : A spherical water drop becomes flat on flat surface. Reason : It becomes flat due to gravity.

Assertion : Liquefaction of NH_3 is easier than CO_2 . Reason : T_c of CO_2 is more than that of NH_3 .

Moles of N_2=0.4 and moles of O_2=0.1 find p_ N_2 (Partial pressure) N_2= ?at atmospherim pressure

In an ideal gas equation which is constant?

If V=1 litre, 10 mole of H_2 and 10 mole of N_2 gas are mixed at temperature 26^ ∘ C , then calculate pressure of the gas.

A gas at 350K and 15 bar has a molar volume 20 per cent smaller than that for an ideal gas under the same conditions. The correct option about the gas, and its compressibility

The volume occupied by 1.8 ~g of water vapour at 374^ ∘ C and 1 bar pressure will be [Use R=0.083 bar L K^ -1 ~mol^ -1 ]

Two separate bulbs contain gas A and gas B . The density of gas A is twice as that of B . The molecular mass of A is half as that of B . If temperature is constant, the ratio of

Assertion : Greater the value of van der Waals' constant ' a ' greater is the liquefaction of gas. Reason : ' a ' indirectly measures the magnitude of attractive forces between

When 1 ~g of gas A at 4 bar pressure is added to 2 ~g of gas B , the total pressure inside the container becomes 6 bar. Which of the following is true?

Gas in a cylinder is maintained at 10 ~atm pressure and 300 ~K temperature. The cylinder will explode if pressure of gas goes beyond 15 atm. What is the maximum temperature to

In van der Waals equation at constant temperature 300 ~K , if a=1.4 ~atm ~L ~mol^ -2 , V=100 ~mL, n=1 ~mole , then what is the pressure of the gas?

A 100 mL flask contained H_2 at 200 torr, and a 200 mL flask contained He at 100 torr. The two flask were then connected so that each gas filled their combined volume. Assume, no

Given, van der Waal&#39;s constant for NH _ 3 , H _ 2 , O _ 2 and CO _ 2 are respectively 4 . 17, 0 . 244, 1 . 36and3 . 59 . Which one of the following gases is most easily

The correction factor &#39;a&#39; to the ideal gas equation corresponds to which of the following?

The density of a gas A is thrice that of a gas B at the same temperature. The molecular weight of gas B is twice that of A . What will be the ratio of the pressures acting on B

The compressibility of a gas is less than unity at STP, therefore

A 20litre container at 400K contains CO _ 2 (g) at pressure 0 . 4atm and an excess of SrO (neglect the volume of solid SrO ). The volume of the container is now decreased by

Assertion : Critical temperature of CO_2 is 304 K , it cannot be liquified above 304 K . Reason : At a certain temperature, volume ∝ 1 pressure

Temperature of a gas is t ~K . What would be the temperature at which volume and pressure, both will reduced to half of the initial values?

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 escape in the time required for

0.40 g of helium in a bulb at a temperature of T ~K had a pressure of p atm. When the bulb was immersed in water bath at temperature 50 K more than the first one, 0.08 g of gas

Given that the reduced temperature, θ=(T)/(T_C) the reduced pressure, π=(F)/(F_C) the reduced volume, φ=(V)/(V_C) Thus, it can be said that the reduced equation of state may be

A gas such as carbon monoxide would be most likely to obey the ideal gas law at:

Equal masses of H _ 2 , O _ 2 and methane have been taken in a container of volume V at temperature 27 ^ o C in identical conditions. The ratio of the volumes of gases H _ 2 : O _

Assertion : At critical point the densities of substance in gaseous and liquid states are same. Reason : Critical temperature is the temperature at which the real gas exhibit

The average kinetic energy of an ideal gas per molecule in SI units at 25^ ∘ C will be

What is the density of N_2 at 227^ ∘ C and 5.00 ~atm pressure? (R=0.082 ~L ~atm ~K^ -1 . .mol^ -1 )

Assertion : In a pressure cooker, the water is brought to boil. The cooker is then removed from the stove. Now on removing the lid of pressure cooker, the water starts boiling

Arrange the following gases in order of their critical temperature. NH_3, H_2 O, CO_2, O_2

50 ~mL of each gas A and of gas B takes 150 and 200 ~s respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36 , the molecular

A certain gas takes three times as long to effuse out as helium. Its molecular mass will be

For real gases van der Waals' equation is written as (p+(a n^2)/(V^2))(V-n b)=n R T where, a and b are van der Waals' constants. Two sets of gases are I. O_2, CO_2, H_2 and He II.

Equal volumes of two monoatomic gases, A and B , at same temperature and pressure are mixed. The ratio of specific heats (c_p / c_V) of the mixture will be

In the van der Waals equation, ' a ' signifies

56 g of nitrogen and 96 g of oxygen are mixed isothermally and at a total pressure of 10 atm . The partial pressures of oxygen and nitrogen (in atm) are respectively

By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?

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

A bubble of air is underwater at temperature 15^ ∘ C and the pressure 1.5 ~bar . If the bubble rises to the surface where the temperature is 25^ ∘ C and the pressure is 1.0 ~bar

A gaseous mixture was prepared by taking equal moles of CO and N_2 . If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N_2) in the

Two flasks X and Y have capacity 1 ~L and 2 ~L respectively and each of them contains 1 mole of a gas. The temperatures of the flasks are so adjusted that average speed of

Equal weight of CO and CH_4 are mixed together in an empty container at 300 ~K . The fraction of total pressure exerted by CH_4 is

The density of a gas is found to be 1.56 ~g / L at 745 mm pressure and 65^ ∘ C . What is the moleculer mass of the gas?

The pressure exerted by 6.0 ~g of methane gas in a 0.03 ~m^3 vessel at 129^ ∘ C is (Atomic masses : C=12.01, H=1.01 and R=8.314 JK^ -1 ~mol^ -1 )

The variation of volume V , with temperature T , keeping pressure constant is called the coefficient of thermal expansion (α) of a gas. i.e., α=(1)/(V)((∂ V)/(∂ T))_P . For an

Assertion : Compressibility factor for hydrogen varies with pressure with positive slope at all pressure. Reason : Even at low pressure, repulsive forces dominate for hydrogen gas

The most probable velocity (in cm / s ) of hydrogen molecule at 27^ ∘ C will be

The mean free path of electrons in a metal is 4 × 10^ -8 ~m . The electric field which can give on an average 2 eV energy to an electron in the metal will be in units of V / m :

The energy absorbed by each molecule (A_2) of a substance is 4.4 × 10^ -19 ~J and bond energy per molecule is 4.0 × 10^ -19 ~J . The kinetic energy of the molecule per atom will

The root mean square speed of the molecules of diatomic gas is \(u\). When the temperature is doubled, the molecules dissociate into two atoms. The new rms speed of the atom is

Assertion : If \(H_2\) and \(Cl_2\) enclosed separately in the same vessel exert pressure of 100 and \(200 ~mm\) respectively, their mixture in the same vessel at the same

A gas mixture contains \(O_2\) and \(N_2\) in the ratio of \(1: 4\) by weight. The ratio of their number of molecules is

The volume of a gas measured at \(27^ ∘ C\) and 1 atm pressure is 10 L. To reduce the volume to 2 L at 1 atm pressure, the temperature required is

If a gas expands at constant temperature, it indicates that

In \(P\) versus \(V\) graph, the horizontal line is found in which ____ exists.

Which amongst the following options is correct graphical representation of Boyle's Law?

Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here P = total pressure of gaseous mixture

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:

Given, van der Waal's constant for NH _ 3 , H _ 2 , O _ 2 and CO _ 2 are respectively 4 . 17, 0 . 244, 1 . 36and3 . 59 . Which one of the following gases is most easily

The correction factor 'a' to the ideal gas equation corresponds to which of the following?