1 L sample of impure water containing sulphide ion is made ammoniacal and is titrated with 300 " mL of " 0.1 M `AgNO_(3)` solution. Which of the following statements is/are correct about the above reaction?
A. The strength of `H_(2)S` in water is `0.51g L^(-1)`
B. The strength of `H_(2)S` in water is `5.1 gL^(-1)`
C. The concentration of `H_(2)S` in water in ppm is 510.
D. The concentration of `H_(2)S` in water in ppm is 51.