Q)
(chatquestion)...2F. GE NO.
DPP-1
78.
Three bases XOH, YOH and ZOH are having the dissociation constant Kb1, K2 and K
respectively (Kb1 <Kb2<Kb3). Then which of the salt solution has minimum pH value
$ (A) XCI
(B) YCI
(C) ZCI
(D)
all have same pH
For a triprotic acid H3A, K, is 10, K„ is 10° and K, is 10-10. The pHranges in which
H2A¯ and HA? are the predominant forms respectively , are
(A) 1-3 and 5 –-7 (B) 5-7 and 1–3 (C) 3–5 and 7-9 (D) 7-9 and 3- 5
79.
The pH of pure water at 80° will be -
(A) >7
80.
(B) <7
(D) cannot be predicted...(Anyone 79 please with solution)
...
