`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 Benedict's test and does not give 2, 4-Dinitrophenylhydrazine test (2,4-DNP)
`HCHO` gives Tollen's test, Benedict's test, Fehling's test 2,4-DNP test and does not give brisk effervescence with `NaHCO_(3)`
Hence choice (b) and (c) correct, while choice (a) and (d) are incorrect