When 1 F of electricity is passed through acidulated water, O2 evolved is
11.2 dm3
5.6 dm3
22.4 dm3
1.0 dm3
Standard electrode potential of cell H2 | H+||Ag+| Ag is
0.8 V
-0.8 V
-1.2 V
1.2 V
A.
0.8 V
Paste is
suspension of solid in a liquid
mechanical dispersion of a solid in liquid
colloidal solution of a solid in solid
None of the above
The disintegration constant of radium with half-life 1600 yr is
2.12 × 10-4 yr-1
4.33 × 10-4 yr-1
3.26 × 10-3 yr-1
4.33 × 10-12 yr-1
Animal charcoal is used in decolorising colour of liquids because it is a good
adsorbate
adsorbent
oxidising agent
reducing agent
Order of reactivity of halogen acids towards an alcohol is
HCl > HBr > HI
HBr > HI > HCl
HI > HBr > HCl
HI > HCl > HBr