Which of the following will not give test for Cl- with AgNO3(aq) at 250C?
Which of the following will not give test for Cl- with AgNO3(aq) at 250C?
COCl3.5NH3
COCl3.6NH3
COCL3.3NH3
COCL3.4NH3
The Correct Option is C
Solution and Explanation
To determine which compound will not give a test for Cl- with AgNO3(aq) at 25°C, it's important to understand coordination compounds and their behavior. In coordination chemistry, some chloride ions can be bound within the coordination sphere of a metal, rendering them non-reactive with silver nitrate.
The test for Cl- ion with AgNO3 results in the formation of a white precipitate of AgCl. For this to occur, Cl- ions must be free and not complexed or bound.
Let's analyze each option:
- COCl3.5NH3: Typically, this would have one Cl- outside the coordination sphere as '[Co(NH3)5Cl]Cl2', leaving two free chloride ions to form AgCl.
- COCl3.6NH3: Likely structured as '[Co(NH3)6]Cl3', all Cl- ions are outside the coordination sphere as free ions, forming a precipitate with AgNO3.
- COCl3.3NH3: Structured as '[Co(NH3)3Cl3]', with all Cl- ions coordinated to Co, leaving no free Cl- ions for reaction with AgNO3.
- COCl3.4NH3: Might be represented as '[Co(NH3)4Cl2]Cl', leaving one Cl- free to react with AgNO3.
Hence, COCl3.3NH3 will not provide a Cl- test with AgNO3 as all chloride ions are involved in coordination and not available in solution to form AgCl.
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Concepts Used:
Haloalkanes and Haloarenes
The hydrocarbons such as Haloalkanes and Haloarenes are the ones, in which one or more hydrogen atoms are replaced with halogen atoms. The main difference between Haloalkanes and Haloarenes is that Haloalkanes are derived from open chained hydrocarbons, also called alkanes, and Haloarenes are derived from aromatic hydrocarbons.
- Haloalkanes have hydrocarbons made up of aliphatic alkanes and one or more hydrogen atoms replaced by halogens (elements such as Chlorine, Bromine, Fluorine, Iodine, etc.) whereas, haloarenes consist of aromatic ring or rings and one or more hydrogen atoms replaced by halogens.
- In haloalkanes, the halogen atom is attached to the sp3 hybridized carbon atom of the alkyl group whereas, in haloarenes, the halogen atom is attached to the sp3 hybridized carbon atom of the alkyl group.
- Haloalkanes are saturated organic compounds where all the chemical bonds are attached to the carbon atom with single bonds and a single carbon atom is attached to the Halogen atom, whereas, the haloarenes differ from Haloalkanes by their method of preparation and properties.
- Haloalkanes are made by aliphatic alkanes by the process of free radical halogenation, whereas, haloarenes are made by direct halogenation of aromatic rings.
- Haloalkanes are odorless compounds, whereas, haloarenes have a sweet odor.
- Haloalkanes precipitate in SN2 substitution reactions, whereas, haloarenes do not precipitate in SN2 substitution reactions.
- Example of haloalkanes is CH3Cl (Methyl Chloride) and CH3CH2Br (Ethyl Bromide) and the example of haloarenes is Chlorobenzene, Bromobenzene.