R.R. Mishra Solutions for Exercise 3: FORMATIVE ASSESSMENT QUESTIONS FOR CCE

Name the process of gain of oxygen. 

Name the process of loss of oxygen. 

Name the process of gain of hydrogen.

Name the process of loss of hydrogen.

Give two examples of reduction.

Oxidation is the loss of electron and reduction is the gain of electron. On the basis of these concepts select the species (i) oxidized, and (ii) reduced in the following reactions.

$\mathrm{Zn}\left(\mathrm{s}\right) + {\mathrm{Cu}}^{2+}\left(\mathrm{aq}\right)\to {\mathrm{Zn}}^{2+}\left(\mathrm{aq}\right)+ \mathrm{Cu}\left(\mathrm{s}\right)$

Oxidation is the loss of electron and reduction is the gain of electron. On the basis of these concepts select the species (i) oxidized, and (ii) reduced in the following reactions.

$\mathrm{Mg}\left(\mathrm{s}\right) + {\mathrm{Cl}}_2\left(\mathrm{g}\right) \to {\mathrm{MgCl}}_2\left(\mathrm{s}\right)$

Oxidation is the loss of electron and reduction is the gain of electron. On the basis of these concepts select the species (i) oxidized, and (ii) reduced in the following reactions.

$\mathrm{Fe}\left(\mathrm{s}\right) + 2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{FeCl}}_2\left(\mathrm{aq}\right) + {\mathrm{H}}_2\left(\mathrm{g}\right)$