Baking powder contains :
NaHCO3, Ca(H2PO2)2 and starch.
NaHCO3, Ca(H2PO2)2
NaHCO3 and starch.
NaHCO3
Sodium thiosulphate is a
reducing agent
oxidising agent
complexing agent
bleaching agent
A.
reducing agent
The presence of excess of sulphur makes sodium thiosulphate a useful reducing agent.
2Na2S2O3 + I2 → Na2S4O6 + NaI
This reaction is applied in volumetric estimation of iodine. In this reaction sodium thiosulphate acts as a reducing agent.
Plaster of Paris on making paste with little water sets to hard mass due to formation of
CaSO4
CaSO4.1/2 H2O
CaSO4 H2O
CaSO4.2H2O
The chemical which is used for plastering the broken bones is
(CaSO4)2H2O
MgSO4·7H2O
FeSO4·7H2O
CuSO4·5H2O
Solution of sodium thiosulphate in photography works as
to shine film
to develop film
to dissolve silver bromide
to change negative into positive