Question

Give the chemical equation (balanced) for the following:
Reaction used in black and white photography.

Answer 1

Hint:This question gives the knowledge about balanced chemical equations and a decomposition reaction. The balanced chemical equation is defined as the equation in which the number of atoms in a molecule are equal in reactant and the product side.

Complete answer:
The reactions that are generally responsible for black and white photography are decomposition reactions. During black and white photography decomposition of salts of silver takes place.
The balanced chemical equation is defined as the equation in which the number of atoms in a molecule are equal in reactant and the product side. The balanced chemical reaction for black and white photography are as follows:
$AgC{l_{\left( s \right)}}\xrightarrow{\Delta }2A{g_{\left( s \right)}} + C{l_{{2_{\left( g \right)}}}}$
And the other balanced chemical reaction for black and white photography is,
$AgB{r_{\left( s \right)}}\xrightarrow{\Delta }2A{g_{\left( s \right)}} + B{r_{{2_{\left( g \right)}}}}$

Additional information:
 Decomposition reactions are the reactions or process of breaking down complex compounds into various simpler compounds. Decomposition reactions require large amounts of heat, electricity or light. Decomposition reactions are the reverse of combination reactions.
The general reaction for describing the decomposition reaction is as follows:
$AB \to A + B$
Uses of decomposition reaction:
$1$. It is very useful in manufacturing calcium oxide or cement.
$2$. It helps in extracting metals from the metal oxides.
$3$. It is also very helpful in the process of thermite welding.
$4$. It is used for curing acid indigestion.

Note:
You should have the complete knowledge about the balancing of chemical reactions. In balanced chemical reactions, the number of atoms in a molecule are equal in reactant and the product side. In decomposition reactions chemical compounds break down into simpler compounds.