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Which oen among the following pairs of ions cannot be separated by H base 2S in dilute hydrochloric acid? a. Bi^3+, Sn^4+ b. Al^3+, Hg^2+ c. Zn^2, Cu^2+ d. Ni^2+, Cu^2+

Which oen among the following pairs of ions cannot be separated by H base 2S in dilute hydrochloric acid?
a. Bi^3+, Sn^4+
b. Al^3+, Hg^2+
c. Zn^2, Cu^2+
d. Ni^2+, Cu^2+

Grade:11

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
9 years ago

(a) NOTE : The ions of group II of salt analysis are precipitated by HCI and H base 2S whereas members of group IV are precipitated by H base 2S in alkaline medium.

? Bi^3+ and Sn^4+ both belong to group II

? They will be precipitated by HCI in presence of H base 2S.

Both Bi^3+ and Sn^4+ belong to group II of qualitative inorganic analysis and will get precipitated by H base 2S.

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