Identify the balanced single displacement reaction. cucl2 + fe ⟶ 2cu + feci2 pbcl4 + 2ca(oh)2 ⟶ 2cacl2 + pb(oh)4 cucl2 + fe ⟶ cu + feci2 pbcl4 + 2ca(oh)2 ⟶ 2cacl2 + 4pb(oh)

Explanation:

This is a single replacement reaction in which iron replaces copper from its salt solution. As iron is more reactive than copper , it easily loses electrons to convert to in and in accepts electrons to form .

The equation is also balanced as equal number of atoms of each element are present on reactant and product side.

1. : The equation is not balanced.

2. : This is a double displacement reaction and is balanced.

4.  : This is a double displacement reaction and is not balanced.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current