Question

which one of the following reactions in not suitable in the laboratory to verify the law of conservation of mass?
(A) mixing HCl and NaOH solution
(B) Thermal decomposition of ferrous sulphate
(C) Mixing copper sulphate and barium chloride solutions
(D) Mixing lead nitrate and potassium iodide solutions.

Answer 1

may be b option is correct hope its help u

Answer 2

option B )Thermal decomposition of ferrous sulphate.