Question

Which of the following is not a double displacement reaction?
⚫  AgNO3 + NaCl ------> AgCl + NaNO3 ⚫Zn + H2SO4---------> ZnSO4 + H2 ⚫CuSO4 + H2S -------> CuS + H2SO4 ) ⚫Pb(NO3) 2 + 2KI -------->PbI2+2 KNO3​

Answer 1

Pb(NO3) 2 + 2KI -------->PbI2+2 KNO3

Explanation:

because it is the double decomposition reaction mark as brainliest

Answer 2

The reaction (b) is not a double displacement reaction that involves

$Zn + H_2SO_4$ → $ZnSO_4 + H_2$

Explanation

DOUBLE DISPLACEMENT REACTION -  

• The reaction in which components of two reactants exchange their bonds to form new chemical products.
• The negative and positive ions tend to exchange between two reacting compounds.
• The reaction involves the formation of an insoluble precipitate or a gas.
• The reaction that involves the formation of salt is known as neutralization reaction or acid-base reaction.
• Example -

1. When silver nitrate reacts with sodium chloride, the displacement of silver and sodium ions leads to the formation of silver chloride salt along with sodium nitrate.  

                       $AgNO_3 + NaCl$ → $AgCl + NaNO_3$  

2. When copper sulphate reacts with hydrogen sulphide, the copper displaces hydrogen to form copper sulphide and sulphuric acid.

                     $CuSO_4 + H_2S$ → $CuS + H_2SO_4$  

3. When lead nitrate reacts with potassium iodide, the lead exchange with potassium ions in the compounds to form lead iodide and potassium nitrate.  

                      $Pb(NO_3)_2 + 2KI$→ $PbI_2 + 2KNO_3$