The NiOMgO binary phase diagram is shown on right side In th
     The NiO-MgO binary phase diagram is shown on right side  In the Phase Diagram, the components are:  Mg and Ni  Mg, Ni, and O  MgO and NiO  SS and L  In the Phase Diagram, the pure MgO melts at:  Line 1  Line 2  Point 1  Point 2  In the Phase Diagram, the liquids is:  Line 1  Line 2  Point 1  Point 2  In the Phase Diagram, the number of degree of freedom (F) at \"Point 1\" is equal to:  0  1  2  3   
  
  Solution
Part 1 (C) Clearly in diagram we can see The diagram is between NiO and MgO with temperature.
Part 2 (d) Point 2 i.e. upper Intersection point of line 1 and 2
Part 3 (a) Line 1
Part 4 (b) One

