Redox Reactions in Terms of Electron Transfer

Which of the following statements are true for the reaction of ${\mathrm{Fe}}_2{\mathrm{O}}_3$ with aluminium?

$1.$ It is known as the thermite reaction.

$2.$ The heat evolved is used for welding purposes.

$3.$ Aluminium metal acts as an oxidizing agent.

$4.$ Molten Fe and Al are formed at the end of the reaction.

Select the correct answer using the code given below.

Which of the following is not an example of redox reaction?

When $\mathrm{P}$reacts with caustic soda, the products are ${\mathrm{PH}}_3$ and ${\mathrm{NaH}}_2{\mathrm{PO}}_2$. This reaction is an example of

Which of the following is a redox reaction?

Which of the following is not a redox reaction ?

Which of the following is not a redox reaction?

Among the following, identify the correct statement.

In the reaction
$\mathrm{Cu}+\underset{(\mathrm{conc}.)}{{\mathrm{H}}_2{\mathrm{SO}}_4}⟶{\mathrm{CuSO}}_4+{\mathrm{SO}}_2+{\mathrm{H}}_2\mathrm{O}$
${\mathrm{H}}_2{\mathrm{SO}}_4$ behaves w.r.t. $\mathrm{Cu}$ as

Hydrogen acts as reducing agent

Which of the following can undergo a chemical reaction?

Which of the following displacement reactions cannot occur?

Consider the reaction and the statements that follow

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\stackrel{\Delta }{⟶}{\mathrm{N}}_2+{\mathrm{Cr}}_2{\mathrm{O}}_3+4{\mathrm{H}}_2\mathrm{O}$

S-I : The above reaction is an example of disproportionation reaction

S-II : Equivalent weight of ${\left({\mathrm{NH}}_4\right)}_2 {\mathrm{Cr}}_2{\mathrm{O}}_7$ is $\frac{\mathrm{Molecular} \mathrm{weight}}{12}$

Choose the correct option.

$1.25\mathrm{g}, {\mathrm{CuSO}}_4·{\mathrm{xH}}_2\mathrm{O}$ were dissolved in water and ${\mathrm{H}}_2\mathrm{S}$ was passed through solution to completely precipitate $\mathrm{CuS}, 30\mathrm{ml}, \frac{\mathrm{N}}{3}\mathrm{NaOH}$ were required to neutralise the liberated ${\mathrm{H}}_2{\mathrm{SO}}_4$ in the filtrate. Calculate $\mathrm{x},\left({\mathrm{A}}_{\mathrm{Cu}}=63.5\right)$

Which is reduced in the following reaction

$\left(\mathrm{a}\right)2\mathrm{KI}\left(\mathrm{aq}\right)+\left(\mathrm{b}\right){\mathrm{Cl}}_2\left(\mathrm{aq}\right)\to 2\mathrm{KCl}+{\mathrm{I}}_2\left(\mathrm{aq}\right)$

Which compound among the following can act as both an oxidizing and a reducing agent ?

${\mathrm{Zn}}_{\left(\mathrm{s}\right)} + {{\mathrm{CuSO}}_4}_{\left(\mathrm{aq}\right)} \to {{\mathrm{ZnSO}}_4}_{\left(\mathrm{aq}\right)} + {\mathrm{Cu}}_{\left(\mathrm{s}\right)}$

Above reaction is an example of:

${\mathrm{Zn}}_{\left(\mathrm{s}\right)} + {{\mathrm{CuSO}}_4}_{\left(\mathrm{aq}\right)} \to {{\mathrm{ZnSO}}_4}_{\left(\mathrm{aq}\right)} + {\mathrm{Cu}}_{\left(\mathrm{s}\right)}$

Above reaction is an example of:

The reaction in which hydrogen is gained is called:

In which of the following reactions does the underlined species get oxidised?

Which of the following is not a redox reaction?