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List of top Chemistry Questions on States of matter

A closed vessel contains 10 g of an ideal gas X at 300 K, which exerts 2 atm pressure. At the same temperature, 80 g of another ideal gas Y is added to it and the pressure becomes 6 atm. The ratio of root mean square velocities of X and Y at 300 K is
Number of molecules and moles in 2.8375 litre of O2 at STP.
Which of the following is a physical change?

NaOH is deliquescent

Intermolecular forces are forces of attraction and repulsion between interacting paiticles that will include : 

A. dipole - dipole forces. 
B. dipole - induced dipole forces. 
C. hydrogen bonding. 
D. covalent bonding. 
E. dispersion forces. 
Choose the most appropriate answer from the options given below :
Based on the given figure, the number of correct statement/s is/are _______

A. Surface tension is the outcome of equal attractive and repulsive forces acting on the liquid molecule in bulk
B. Surface tension is due to uneven forces acting on the molecules present on the surface
C. The molecule in the bulk can never come to the liquid surface
D. The molecules on the surface are responsible for vapour pressure if the system is a closed system
The purest form of water can be obtained from:
A metal chloride contains 55% by mass of chlorine. 100 mL of vapours gives 0.57 gm of chlorine at STP. Calculate the molecular mass of metal chloride. (Nearest integer)
Find the WRONG statement from the following lists:

The rate of diffusion of a gas A is √5 times more than of gas B. If the molar mass of A is x gmol-1, the molar mass of B ( in g mole-1) is

Which statement(s) is/are applicable above critical temperature?
Which among the following option is the correct graphical representation of Boyle's Law?
The root mean square(rms) speed of X2 gas is x m/s at a given temperature. When the temperature is doubled, the X2 molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)
Case-1: An ideal gas of molecular weight M at temperature T.
Case-2: Another ideal gas of molecular weight 2M at the temperature \(\frac{T}{2}\).
Identify the correct statement in the context of the above two cases.

Calculate final volume of a gas when pressure of 60 mL gas is increased from 1 to 1.5 atm, keeping temperature constant

The critical temperature of some gases are: Methane 190K, ammonia 405K, carbon dioxide 304K, n-butane 425K and dihydrogen 33K. The gas that is adsorbed to the maximum extent on 1g of activated charcoal at a given temperature is
Assertion (A): In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells.
Reason(R): In an ionic solid, Frenkel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality.
Choose the most appropriate answer from the options given below:
A 10.0 L flask contains 64 g of oxygen at 27°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)
The absorption of ink by blotting paper involves

For irreversible expansion of an ideal gas under isothermal condition, the correct option is

Choose the correct option for the total pressure (in atm.) in a mixture of 4 g O2 and 2 g H2 confined in a total volume of one litre at 08C is : [Given R=0.082 L atm mol−1K−1, T=273 K]

The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is
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
A mixture of $N_2$ and $Ar$ gases in a cylinder contains $7\,g$ of $N_2$ and $8\,g$ of $Ar$. If the total pressure of the mixture of the gases in the cylinder is $27\, bar$, the partial pressure of $N_2$ is : [Use atomic masses (in g $mol^{-1}$) :$N = 14,Ar = 40$]
Points I, II and III in the following plot respectively correspond to ($V_{mp} :$ most probable velocity)

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