Q1: Pick out the wrong statement.

ANS:B - Equal volumes of Argon and Krypton contain equal number of atoms.

The wrong statement is: "Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 10^23." This statement is incorrect because it implies that the number of molecules in 22.4 liters of hydrogen gas at NTP (Normal Temperature and Pressure) is exactly equal to Avogadro's number (6.023×10236.023×1023). However, this would only be true if the gas were an ideal gas and if the volume were measured at standard temperature and pressure (STP), where 1 mole of any ideal gas occupies 22.4 liters. At NTP, 22.4 liters of hydrogen gas contains 1 mole of hydrogen molecules (𝐻2H2​), but the number of molecules is twice the Avogadro's number because each molecule of hydrogen (𝐻2H2​) contains two hydrogen atoms. Therefore, the correct statement would be that the number of hydrogen molecules in 22.4 liters of hydrogen gas at NTP is 2×6.023×10232×6.023×1023. The other statements are correct:

• Heat capacity of a diatomic gas is indeed higher than that of a monoatomic gas due to the additional degrees of freedom available in diatomic molecules.
• Equal volumes of argon and krypton do contain an equal number of atoms because both argon and krypton are monoatomic gases.
• An azeotropic mixture is indeed a binary mixture of a particular composition in both vapor and liquid states.