Copper sulphate solution does not react with
Zinc
Iron
Silver
All of these
C.
Silver
CuSO4 will react with elements placed above it in electrochemical series and it would not react with elements placed below it in electrochemical series.
CuSO4 reacts with Zn and Fe placed above it
CuSO4 + Fe → FeSO4 + Cu
CuSO4 + Zn → ZnSO4 + Cu
CuSO4 does not react with Ag, placed below it.
CuSO4 + Ag → no reaction.
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
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