FeCO₃ and PbCrO₄ is insoluble in water.
Step-by-step explanation:
If any substance added to water and it form ions then it is soluble in water otherwise it is insoluble in water.
a. NH₄OH - soluble in water
b. NaNO₃ - soluble in water
C. PbCrO₄ is insoluble in water
d. SrSO₄ slightly soluble in water
e. K₃PO₄ - Soluble in water
f. AgClO₄- Highly Soluble in water
g. HgCl₂ - Slightly soluble in water
h. FeCO₃ - insoluble in water
i. NH₄Br - soluble in water
j. Li₂Cr₂O₇ - soluble in water