Pyrorefining

Q.

In the ellingham diagram there is. Sudden increase in the slope towards the positive side.But logically it should increase towards the negative side as entropy increases.COULD SOMEONE CLEAR MY DOUBTS, PLEASE, SIR/ MAMMA?

Q. Thermite process is used to extract metals

1. when their oxides can't be reduced by carbon
2. when their carbonates do not yield oxides by thermal decomposition
3. when their sulphides can't be converted into oxides by roasting
4. when their melting points are very high

Q. The metal obtained in the Pidgeon process is:

1. $Na$
2. $Mg$
3. $Ca$
4. $Al$

Q. State reason for the following:
A metal sulphide is converted into its oxide to extract the metal from the sulphide ore.