19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following statements is not correct?
Entropy of the universe is
The respective examples of extensive and intensive properties are
In thermodynamics a process is called reversible when
A system absorbs 10 kJ of heat and does 4 kJ of work. The internal energy of the system
The statement “The change of enthalpy of a chemical reaction is same whether the reaction takes place in one or several steps” is
The standard free energy change G is related to K (equilibrium constant) as
Tea placed in thermos flask is an example of
Which is included in thermodynamic equilibrium from the following?
Which of the following is intensive property?
Which of the following is a state function and also an extensive property?
The volume of gas is reduced to half from its original volume. The specific heat will____.
Regarding the internal energy of the molecule, which of the following statement is correct?
Which of the following is a path function?
Which of the following is a state variable?
A thermally isolated gaseous system can exchange energy with the surroundings. The mode of energy may be
The enthalpy of vaporisation of a compound AB at its boiling point (127°C) is 6.4 kJ mol-1. Its entropy of vaporization is
In an isothermal expansion of an ideal gas
Which of the following processes is reversible?
Which of the following processes is irreversible?
In an adiabatic expansion of ideal gas
When ice melts into water, entropy
Which of the following processes is a non-spontaneous process?
Entropy is a measure of
The following data is known about the melting of a compound AB. ∆H = 9.2 kJ mol–1. ∆S = 0.008 kJ K–1mol–1. Its melting point is :