The valency of a Phosphate ion is
valency of phosphate ion is -3 as you have learn.
In which reaction heat is produce?
As u have learn in chapter in exothermic reaction heat is produce..
The Reaction in which two compounds exchange their ions to form new compound is
This type of reaction is known as double displacement reaction or metathesis reaction.
combustion of fuel is
Answer is C
For ur note:-chemical reaction. Isomerization, the chemical process by which a compound is transformed into any of its isomeric forms, i.e., forms with the same chemical composition but with different structure or configuration and, hence, generally with different physical and chemical properties
what is endothermic recation