a — 
- — i 
1922. | Indian Science Congress. L.8.C. 57 
The same change, however, takes place in the dark (Dhar 
Jour. Chem. Soc. 1917, IT], 690) if a few drops of a decinormal 
potassium permanganate are added to the mixture, as soon as 
the colour of the permanganate is discharged mercurous chlo- 
D cereal Pasa tion of mercuric chloride and bromide by 
acid, malonic acid, glycollic acid, cane sugar, grape sugar, 
glycerine, lactic acid, hydroxylamine, hydrochloride, hydrozine- 
hydrochloride, etc., the reduction of gold chloride, by several 
reducing agents, and the reduction of silver nitrate, cupric 
chloride and selenious acid (to Selenium) by various organic 
acids are promoted by the addition of such oxidising agents as 
potassium permanganate, potassium persulphate, manganese 
dioxide, potassium nitrite hydrogen peroxide, ceric salts ete. 
(Dhar Proc. Akad. Vetensk. Amsterdam, 1921, 23, 1074). 
12 It is a remarkable fact that this effect is particulatly 
noticeable in those reactions, which are very sensitive to light. 
According to the customary nomenclature, the faster 
which takes part in the primary reaction is called the inductor, 
and the substance which takes part in the secondary reaction 
is called the acceptor. The way in which the inductor acts 
is not known and hence these induced reactions form a branch 
of catalysis. 
Oxidation reac- 
tions. 
Secondary change. 
Primary change. 
- Mercurie chloride + Sodium 
_ arsenite 
Mercurie chloride + Sodium sul 
hite 
3 s + Formic acid 5 a i 
” ” + Sodium 9 +e + is 
hosphite. 
* * + adit sul- os ,, + Arsenicus 
phite acid. 
3 ”? jum ty > 99 
phosphite. aS 
Sodium sulphite + Ai Sodium nitrite + Air. 
2 = oe Potassium oxalate + ., 
¥ am +, Ferrous ammon+ ,, 
sulpha 
+ Oxygen Ferrous hydrox- + Oxygen, 
ide. 
