Write chemical reactions to justify that hydrogen peroxide can fu… - Vidyadip

Question

Write chemical reactions to justify that hydrogen peroxide can function as an oxidising as well as reducing agent.

✓

Answer

Hydrogen peroxide, $\text{H}_2\text{O}_2$ acts as an oxidizing as well as a reducing agent in both acidic and alkaline media.
Reactions involving oxidizing actions are:

$2\text{Fe}^{2+}+2\text{H}^{+}+\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{Fe}^{3+}+2\text{H}_2\text{FO}$
$\text{Mn}^{2+}+\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }\text{Mn}^{4+}+2\text{OH}^-$
$\text{PdS}+4\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }\text{PdSO}_4+4\text{H}_2\text{O}$
$2\text{Fe}^{2+}+\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{Fe}^{3+}+2\text{OH}^-$

Reactions involving reduction actions are:

$2\text{MnO}_4^-+6\text{H}^{+}+5\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{Mn}^{2+}+8\text{H}_2\text{O}+5\text{O}_2$
$\text{I}+\text{H}_2\text{O}_2+2\text{OH}^-\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{I}^-+2\text{H}_2\text{O}+\text{O}_2$
$\text{HOCl}+\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }\text{H}_3\text{O}^{+}+\text{Cl}^-+\text{O}_2$
$2\text{MnO}_4^-+3\text{H}_2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ \ }2\text{MnO}_2+3\text{O}_2+2\text{H}_2\text{O}+2\text{OH}^-$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Hydrogen→Hydrogen — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

How can $\text{D}_2\text{O}$ be prepared from water? Mention the physical properties in which $\text{D}_2\text{O}$ differs from $\text{H}_2\text{O}$. Give at least three reactions of $\text{D}_2\text{O}$ showing the exchange of hydrogen with deuterium.

Write the formulae of:

Albite.
Chile salt petre.
Glauber's salt.
Borax.

Balance and complete the following reactions:

$\text{Fe(s)}+\text{H}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ }$
$\text{Zn(s)}+\text{NaOH}(\text{aq})\xrightarrow{\ \ \ \ \ \ \ \ \ \ }$
$\text{Mg(s)}+\text{HNO}_3(\text{aq})\xrightarrow{\ \ \ \ \ \ \ \ \ }$

(b) Write chemical equations for the following:
(1) $H_2O_2$, as an oxidising agent in acidic medium.
(ii) $H_2O_2$ as an reducing agent in basic medium.
(iii) $H_2O_2$ as an reducing agent in basic medium.
(iv) $H_2O_2$ as an reducing agent in acidic medium.

What will be the pressure exerted by a mixture of $3.2g$ of methane and $4.4g$ of carbon dioxide contained in a $9dm^3$ flask at $27^\circ C$?

How much copper can be obtained from 100 g of copper sulphate $\left(\mathrm{CuSO}_4\right) ?$

i. An athlete is given 100 g of glucose of energy equivalent to 1560 kJ . He utilises $50 \%$ of this gained energy in the event. In order to avoid storage of energy in the body, calculate the weight of water that would need to perspire. The enthalpy of vaporisation of water is $44 kJ mol ^{-1}$.
ii. Compound with carbon-carbon double bond, such as ethylene, $C _2 H _4$, add hydrogen in a reaction called hydrogenation, $C _2 H _4(g)+ H _2(g) \rightarrow C _2 H _6(g)$
Calculate enthalpy change for the reaction, using the following combustion data,

$\text{C}_2\text{H}_4(\text{g})+3\text{O}_2(\text{g})\overrightarrow{\ \ \ \ \ }\ 2\text{CO}_2(\text{g})+2\text{H}_2\text{O(l)};$ $\Delta_\text{c}\text{H}^\circ=-1401\text{kJ mol}^{-1}\dots(\text{i})$

$\text{C}_2\text{H}_6(\text{g})+\frac{7}{2}\text{O}_2(\text{g})\overrightarrow{ \ \ \ \ \ \ \ }\ 2\text{CO}_2(\text{g})+3\text{H}_2\text{O(l)}$ $\Delta_\text{c}\text{H}^\circ=-1550\text{kJ mol}^{-1}\dots(\text{ii})$

$\text{H}_2(\text{g})+\frac{1}{2}\text{O}_2(\text{g})\overrightarrow{ \ \ \ \ }\ \text{H}_2\text{O(l)};$ $\Delta_\text{c}\text{H}^\circ=-286.0\text{kJ mol}^{-1}\dots(\text{iii})$

Nitrogen molecule $\left( N _2\right)$ has radius of about 0.2 nm . Assuming that nitrogen molecule is spherical in shape, calculate:
i. Volume of a single molecule of $N _2$.
ii. The percentage of empty space in one mole of $N _2$ gas at STP.

Why does boron triflouride behave as a Lewis acid?

Define the octet rule and explain its limitations with examples.

Derive the formula to find the ionization constant of weak acids and bases and how will you obtain the value of [H] to find their pH?