MY Ksp=S12=6.2w.e−13=62w.e−14 S1=7.9w.e−7mole/lt = Solubility in pure water
MY3Ksp=27S24=6.2w.e−13=62w.e−14
S2≃10−3.5mole/lt = Solubility in pure water Solubility of NY3 > solubility of MY so 3rd statement is true Addition of KY will decrease the solubility due to common ion effect.