See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

  o m HCOOH         o o o m m 2 4 m 2 4 1 1 HCOONa Na SO K SO 2 2          o o m m KCl HCl   260 308 105 150 426 2 2      2 1 405 Scm mol 