Which alloy contains a non-metal?

Identify the metal which is not common to German silver and brass.

Give the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false.
$(i)$ $Cu$ metal is extracted from its sulphide ore by reduction of $Cu_2O$ with $FeS$.
$(ii)$ An ore of Tin containing $FeCrO_4$ is concentrated by magnetic separation method.
$(iii)$ Auto reduction process is used in the extraction of $Cu$ & $Hg$.
$(iv)$ Cassiterite and Rutile are oxide ores of the metals.

Mark the steel in which carbon percentage is highest.

Consider the following statements:
$(i)$ Froth flotation technique is used to concentrate sulphide ore.
$(ii)$ Froth flotation technique is based upon differential wettability of ore and impurity in water.
$(iii)$ Red Bauxite is concentrated by Bayer's process.
$(iv)$ Carbon is used as a reducing agent during the extraction of zinc from zinc blende.
Which of the following statements are correct?

Given below are two statements related to Ellingham diagram:
Statement-$I$ : Ellingham diagrams can be constructed for formation of oxides,sulfides and halides of metals.
Statement-$II$ : It consists of plots of $\Delta_f H^0$ vs $T$ for formation of oxides of elements.
In the light of the above statements,choose the most appropriate answer from the options given below: