Name the buffer which is use to maintained `pH` of 8 to 10 for precipitation of cations III A group in qualitative analysis

Group reagent for the precipitation of group II basic radicals for the qualitative analysis is

H_(2)S gas when passed through a solution of cations containing HCl precipitates the cations of second group in qualitative analysis but not those belonging to the fourth group. It is because

The buffer system which helps to maintain the pH of blood between 7.26 to 7.42 is

Which of the following gases is used for separating metal ions into respective groups in qualitative inorganic analysis?

The salt which finds uses in qualitative inorganic analysis is