Which of the following statements `"is"//"are"` wrong?

Options

A. Beilstein test is reliable test for halogens in organic compounds
B. In Lassaigne's test for N, Prussian blue colour is due to the formation of ferro-ferri cyanide
C. When FeCl3 solution is added to the Lassaigne's extract, ablue solution is obtained, which indicates the presence of both N and S
D. Molecular mass of an acid = `"Equivalent mass" xx "acidity"`

Answer

A, B, C

Explanation

a) Urea and thio urea also given Beilstein test
b) In Lassaigne.s test, prussion blue colour is due to formation of Ferri Ferro cyanide
c) In Lassaigne.s test, blood red color given due to presence of N and S