Join 60,000+ competitive exam aspirants
or with email
Your Cart
Subtotal₹0
Total₹0
Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
Join 60,000+ competitive exam aspirants
The reaction AgNO3(aq)+Na Cl(aq)→Ag Cl(s)+NaNO3(aq) is an example of which type of reaction?
Combination reaction
Decomposition reaction
Double displacement reaction
Displacement reaction
Double displacement reaction
A double displacement (metathesis) reaction involves the exchange of ions between two ionic compounds, producing new compounds such as a precipitate, gas, or water.
A double displacement (metathesis) reaction involves the exchange of ions between two ionic compounds, producing new compounds such as a precipitate, gas, or water.
It is like two couples swapping partners so that each new couple forms a more stable pairing, just as ions swap to form a less soluble compound.
AB + CD → AD + CB (swap the partners)
Ag++Cl−→Ag Cl(s) — net ionic equation
Ksp=[Ag+][Cl−]=1.8×10−10 — solubility product of AgCl
When aqueous solutions of AgNO3 and NaCl are mixed, Ag+ pairs with Cl− to form insoluble AgCl(s) while Na+ pairs with NO3− to remain in solution as NaNO3(aq). The driving force is the low solubility of AgCl, expressed by its solubility product Ksp.
AgCl is insoluble in water, so it precipitates out of the solution.
The overall reaction conserves the total number of each type of ion, only their partners change.
Qualitative analysis for detecting chloride ions via AgCl precipitation
Industrial wastewater treatment using precipitation to remove heavy metals
Ksp of AgCl ≈ 1.8×10⁻¹⁰ at 25 °C, indicating very low solubility
Option A (Combination) would merge reactants into a single product, which is not the case; Option B (Decomposition) breaks a single compound into simpler ones; Option D (Displacement) involves a single element replacing another in a compound.
C is correct — the reaction involves ion exchange between two soluble salts forming an insoluble precipitate, a hallmark of double displacement reactions.
Identify double displacement reactions by checking if one product is a precipitate, gas, or water; this cue speeds up answer selection in competitive exams.