Predict the physical state of the metal $M$ obtained in the following reduction reaction shown by the Ellingham diagram: $MO(s) + C(s) \rightarrow M(?) + CO(g)$.

Which one of the following oxides is reduced by water gas to obtain the metal during its extraction?

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: The reduction of a metal oxide is easier if the metal formed is in liquid state than solid state.
Reason $R$: The value of $\Delta G^{\ominus}$ becomes more on negative side as entropy is higher in liquid state than solid state.
In the light of the above statements,choose the most appropriate answer from the options given below.

Which series of reactions correctly represents chemical reactions related to iron and its compounds?

In a blast furnace,the maximum temperature is in the......

Upon heating with $Cu_2S$,the reagent$(s)$ that give copper metal is/are:
$(A)$ $CuFeS_2$
$(B)$ $CuO$
$(C)$ $Cu_2O$
$(D)$ $CuSO_4$