`HCOOH` and `HCHO` may be distinguished by

Options

A. Tollen's test
B. sodium bicarbonate test
C. 2,4,DNP test
D. Benedict's test

Answer

B, C

Explanation

`HCOOH` gives brisk effervescence with `NaHCO_(3)` due to evolution of `CO_(2)`
`HCOOH` gives Tollen's test, Fehling's test, Benedict's test and does not give 2,4-dinotrophenylhydrazine test (2,4-DNP) `HCHO` gives Tollen's test, Benedict's test, Fehling test, `2,4-DNP` tet does not give brisk effervescence with `NaHCO_(3)`. Hence choices (b) and (c) are correct but choice (a) and (d) are incorrect.