Question

Consider the reaction
KBr (aq) + AgNO3 (aq) → KNO3 (aq) + AgBr (s)
This is an example of
(a) decomposition reaction
(b) combination reaction
(c) double displacement reaction
(d) displacement reaction

Answer 1

Answer:

KBr (aq) + AgNO3 (aq) → KNO3 (aq) + AgBr (s)

This is an example of

Option C

double displacement reaction

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Answer 2

The correct answer is option (c) double displacement reaction.

• A double displacement reaction is a process in which the exchange of bonds between two reactants in a chemical reaction results in the formation of products with identical bonding affiliation.
• The reaction is represented as :

: AB + CD -----------> AC + BD

• In the given reaction. Reactants potassium bromide(KBr) and silver nitrate(AgNO₃) the anions br- and NO3+ have switched places to form products Potassium nitrate(aq) and silver bromide(AgBr).
• A decomposition reaction is a chemical reaction in which One compound is broken down into two or more simpler products.
• Example of decomposition reaction-

decomposition of hydrogen peroxide -

H₂O₂ ------> 2H₂0 + [O]

• A combination reaction is a type of reaction which involves more than one reactant to form a single product.
• Example of combination reaction -

H⁺ + OH⁻ ----------> H₂O

• A displacement reaction- is a reaction wherein a more reactive element displaces the lesser reactive element from its compound.

For example -

Fe+CuSO₄-------->FeSO₄+Cu

• In the above example, iron displaces copper from ferrous sulfate because it is more reactive than copper.
• Thus, the reaction in the question is an example of a double displacement reaction.

Hence, option (c) is correct.

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