Question

what is material X with explanation

Answer 1

(a)material X contains with proteins
The use of copper salts for precipitating proteins which can
not otherwise be easily brought to separate from aqueous solu-
tions was first employed by Ritthausenl who also attempted to
determine the composition of the copper compounds prepared
from several vegetable proteins. He later developed a method
for analyzing milk in which the proteins were separated as cop-
per compounds. During subsequent years several attempts
were made by others to obtain definite compounds of proteins
with copper and other metals, but as the methods employed
were wholly different from those of the experiments here de-
scribed they need not be referred to further.

Answer 2

you answer is A



beacuse when we mix copper sulphate to caustic acid it turns into violet


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