A white precipitate can be obtained by adding sulphuric acid to: (a) CuSO4 solution (b) NaCl solution (c) BaCl2 solution Na2SO4 solution

Option (c) is the answer. When dilute sulphuric acid reacts with the barium chloride then the barium sulphate is formed as a product with hydrochloric gas and thus formed barium sulphate will be white precipitate which is insoluble.