The reaction of Q with PhSNa yields an organic compound (major product) that gives positive Carius test on treatment with Na₂O₂ followed by addition of BaCl₂. The correct option(s) for Q is (are)

The correct statement(s) related to colloids is (are)

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) :