Baking powder contains :
NaHCO3, Ca(H2PO2)2 and starch.
NaHCO3, Ca(H2PO2)2
NaHCO3 and starch.
NaHCO3
Which compound is used in photography?
Na2SO5
Na2S2O8
Na2S26
Na2S2O3
D.
Na2S2O3
he photographic plate is coated with the thin layer of an emulsion of silver bromide dispersed in gelatin. Hypo or sodium thiosulphate (Na2S2O3) is used in the fixing of image. It dissolves unaffected AgBr but leaves metallic silver unchanged.
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