Baking powder contains :
NaHCO3, Ca(H2PO2)2 and starch.
NaHCO3, Ca(H2PO2)2
NaHCO3 and starch.
NaHCO3
Which of the following does not react with sodium metal?
(CH3)2O
CH3CH2OH
CH3COOH
C6H5OH
A.
(CH3)2O
Acetic acid, phenol and alcohol show acidic character, hence they react with sodium metal while ether is not acidic in nature, hence it does react with sodium metal.
CH3-O-CH3 + Na → No reaction
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