Multiple Choice QuestionsH2O2 cannot oxidise
PbS
Na2SO3
O3
KI
C.
O3
H2O2 cannot oxidise O3, as ozone (O3) is a powerful oxidising agent. The reasons is that ozone has higher energy content than dioxygen and hence decompose to give dioxygen and atomic hydrogen.
O3(g) → O2(g)(Dioxygen) + O(g) (atomic oxygen)
H2O2 on reaction with O3 shows the following reaction
H2O2 + O3 → H2O + 2O2
i.e both reduce each other.
However, H2O2 oxidise PbO → PbSO4
Na2SO3 → Na2SO4
KI → K2SO4
Pick the correct statement among the following statement.
Sodium dodecyl benzene sulphonate used in tooth paste ts a cationic detergent
Non-ionic detergents is formed when polyethylene glycol reacts with adipic acid
Cetyl trimethyl ammonium bromide is a popular cationic detergent used in air conditioner
Sodium lauryl sulphate forms an insoluble scum with hard water
In the manufacture of hydrogen from water gas (CO + H2), which of the following is correct statement?
CO and H2 are separated based on difference in their densities
H2 is removed by occlusion with Pd
CO is oxidised to CO2 with steam in the presence of a catalyst followed by absorption of CO2 alkali
Hydrogen is isolated by diffusion
Water possesses a high dielectric constant, therefore:
it always contains ions
it is a universal solvent
can dissolve covalent compounds
can conduct electricity
The value of the ionic product of water depends:
on volume of water
on temperature
changes by adding acid or alkali
always remain constant
In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to
generate heat
create potential difference between the two electrodes
produce high purity water
remove adsorbed oxygen from electrode surfaces
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