Import Question JSON

$\text{Sulphide ores can be separated by depressants.}$ $\text{The Froth floatation process is used to extract metal from sulphide ore.}$ $\text{This method utilises collectors and depressants whose functions are as follows:}$ $\text{(i) Collectors enhance the non-wettability of the mineral particles.}$ $\text{Hence, the first statement is the correct statement.}$ $\text{(ii) By using depressants in the process of froth floatation two sulphide ores}$ $\text{can be separated. e.g., sodium cyanide is used as a depressant to separate}$ $\text{lead sulphide ore from zinc sulphide ore.}$ $\text{Hence, the first and third are the correct statements.}$ $\text{Collectors enhance the wettability of gangue particles. It is the wrong statement}$ $\text{Froth stabilizer has nothing to do with wettability. Froth stabilisers (e.g.,}$ $\text{cresols, aniline) stabilise the froth.}$ $\text{Hence statement fourth is incorrect. Thus, option fourth is the correct answer.}$