An ideal gas undergoes a reversible isothermal expansion from state I to state II followed by a reversible adiabatic expansion from state II to state III. The correct plot(s) representing the changes from state I to state III is (are)

(p : pressure, V : volume, T : temperature, H : enthalpy, S : entropy)

The correct statement(s) related to the metal extraction processes is (are) :

A mixture of two salts is used to prepare a solution S, which gives the following results :


The correct option(s) for the salt mixture is (are)

The maximum number of possible isomers (including stereoisomers) which may be formed on mono-bromination of 1-methylcyclohex-1-ene using Br₂ and UV light is ___________.