Which of the following mixtures can act as a buffer?

1.	Which of the following mixtures can act as a buffer?
Answer» `NaOH + HCOONA(1:1 "molar ratio")` `HCOOH + NaOH(2:1 "molar ratio")` `NH_(4)Cl + NaOH(2:1 "molar ratio")` `HCOOH + NaOH(1:1 "molar ratio")` SOLUTION :`{:("For C option",NH_(4)Cl,+,NaOH,rarr,NH_(4)OH+NaCl),("INITIAL",2,,1,,0),(R&F:,1,,1,,1),("Left:",1,,0,,1),("HENCE basic buffer:",,,,,):}`

Discussion