An udentified substance, Y, was thought to be one of the following three compounds.


Compound: A

Melting point: 132 °C


Compound: B

Melting point: 133 °C


Compound: C

Melting point: 134 °C



Y was mixed with each of the above compounds and the melting point of each mixture was determined. The following results were obtained.


Mixture: Y + A

Melting point: 114 – 129 °C


Mixture: Y + B

Melting point: 132 – 133 °C


Mixture: Y + C

Melting point: 86 – 99 °C



Deduce the identity of Y. Briefly explain your answer.