HF is not preserved in glass bottle because :
it reacts with the visible part of the light
it reacts with the sodium oxide of the glass
it reacts with the aluminium oxide of the glass composition
it reacts with SiO2 of the glass
Oils can be converted into fats by :
hydrogenolysis
hydrogenation
decarboxylation
hydration
B.
hydrogenation
Oils can be converted into solid fats by the process of hydrogenation .
Hydrogenation : The vegetable oils containing glycerides of unsaturated fatty acids , undergo catalytic hydrogenation with hydrogen in presence of finely divided nickel .This results in conversion of a liquid glyceride (i.e , an oil) into solid glyceride (i.e , a fat)
+ 3H2
(fat)
In a lead storage battery , reaction at cathode is :
Pb + SO42- PbSO4 + 2e-
Pb + PbO2 + 2H2SO4 2PbSO4 + 2H2O
PbSO4 + 2e- Pb + SO42-
PbO2 + 4H+ + SO42- + 2e- PbSO4 + 2H2O
In coagulating the colloidal solution of As2S3 .which has the minimum coagulating value ?
NaCl
KCl
BaCl2
AlCl3