Advertisements
Advertisements
प्रश्न
\[\ce{H2O2}\] is a better oxidising agent than water. Explain.
Advertisements
उत्तर
\[\ce{H2O2}\] is a better oxidizing agent than water. \[\ce{H2O2}\] acts as an oxidizing agent in acid as well as in alkaline medium.
\[\ce{H2O2 + 2H^{+} + 2e^{-} ->[Acid] 2H2O; E^Θ = 1.77 V}\]
\[\ce{H2O2 + OH^{-} + 2e^{-} ->[Alkaline] 3OH-; E^Θ = 0.88 V}\]
Oxidation state of oxygen changes from – 1 to – 2. Oxidising nature of \[\ce{H2O2}\] can be interpreted on account of possession of labile oxygen.
\[\ce{H2O2 -> H2O + O}\]
When water acts as an oxidizing agent, it is reduced to \[\ce{H2}\]. Water reacts with number of active metals whose electrode potential is less than – 0.83 V.
\[\ce{\underset{Reduction}{2Na} + \underset{Oxidant}{2H2O} -> 2NaOH + H2}\]
APPEARS IN
संबंधित प्रश्न
Arrange the following:
CaH2, BeH2 and TiH2 in order of increasing electrical conductance.
Sea water is a bad conductor of electricity.
State whether the following statement is true or false.
The substance in which a solute dissolves is called a solvent.
Explain the various properties of water.
Why should a glass bottle completely filled with water never be kept in a freezer?
Define the following.
Freezing point
Which of the following equation depicts reducing nature of \[\ce{H2O2}\]?
Some of the properties of water are described below. Which of them is/are not correct?
(i) Water is known to be a universal solvent.
(ii) Hydrogen bonding is present to a large extent in liquid water.
(iii) There is no hydrogen bonding in the frozen state of water.
(iv) Frozen water is heavier than liquid water.
If same mass of liquid water and a piece of ice is taken, then why is the density of ice less than that of liquid water?
Give reasons: Ice floats on water.
Why does water show high boiling point as compared to hydrogen sulphide? Give reasons for your answer.
How will you account for 104.5° bond angle in water?
Write two reactions to explain amphoteric nature of water.
The boiling point of water increases with ______ in pressure.
What are the physical properties of pure water?
The density of gold is 19 g/cm3. If 1.9 × 10−4 g of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius 10 nm, the number of gold particles per mm3 of the sol will be ______ × 106.
The water having more dissolved O2 is ______.
