Осуществить цепочку превращения:
1)
CH4→CH3OH→HCOH→HCOOH→HCOOCH3→CH3OH
2)
C3H7Cl→C3H7OH→HCOOH3H7→HCOOH

1) CH4 -> CH3OH (O2)

   CH3OH + CuO -> HCOH + Cu + H2O

   HCOH + Ag2O -> HCOOH + 2Ag

HCOOH + HOCH3 = HCOOCH3 + H2O

HCOOCH3 + H2O = HCOOH + CH3OH

2) C3H7Cl + NaOH -> C3H7OH + NaCl

   C3H7OH + HCOOH -> HCOOC3H7 + H2O

  HCOOC3H7 + H2O= HCOOH + C3H7OH