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During the qualitative analysis of salt with cation y2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are:
- a)Dimethylglyoxime and Ni2+
- b)Dimethylglyoxime and Co2+
- c)Nessler's reagent and Hg2+
- d)Nessler's reagent and Ni2+
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
During the qualitative analysis of salt with cationy2+, addition of a ...
Explanation:
Qualitative analysis is a method used in chemistry to identify the presence or absence of specific ions or compounds in a given sample. In this question, we are performing a qualitative analysis of a salt with cation Y2.
Step 1: Addition of reagent X to alkaline solution
The first step in the analysis is to add a reagent, X, to an alkaline solution of the salt. This step is crucial as it helps in the identification of the cation Y2.
Step 2: Observation of a bright red precipitate
The addition of reagent X to the alkaline solution of the salt results in the formation of a bright red precipitate. This observation is important in determining the identity of both the reagent X and the cation Y2.
Step 3: Determining the identity of reagent X and cation Y2
To identify reagent X and cation Y2, we can refer to the known reactions and properties of various reagents and cations.
Dimethylglyoxime and Ni2
Dimethylglyoxime is a reagent that forms a bright red precipitate with nickel (Ni2) ions. This precipitate is insoluble in water and is often used as a confirmatory test for the presence of nickel ions in solution.
Dimethylglyoxime and Co2
Dimethylglyoxime also forms a precipitate with cobalt (Co2) ions, but the color of the precipitate is different. The precipitate formed with cobalt ions is pink, not red.
Nessler's reagent and Hg2
Nessler's reagent is used to detect the presence of ammonia (NH3) and its derivatives. It does not form a bright red precipitate with mercury (Hg2) ions.
Conclusion
Based on the observations and known reactions, the correct answer is option A: Dimethylglyoxime and Ni2. The formation of a bright red precipitate in the alkaline solution of the salt confirms the presence of nickel (Ni2) ions, and dimethylglyoxime is the reagent responsible for this reaction.
Qualitative analysis is a method used in chemistry to identify the presence or absence of specific ions or compounds in a given sample. In this question, we are performing a qualitative analysis of a salt with cation Y2.
Step 1: Addition of reagent X to alkaline solution
The first step in the analysis is to add a reagent, X, to an alkaline solution of the salt. This step is crucial as it helps in the identification of the cation Y2.
Step 2: Observation of a bright red precipitate
The addition of reagent X to the alkaline solution of the salt results in the formation of a bright red precipitate. This observation is important in determining the identity of both the reagent X and the cation Y2.
Step 3: Determining the identity of reagent X and cation Y2
To identify reagent X and cation Y2, we can refer to the known reactions and properties of various reagents and cations.
Dimethylglyoxime and Ni2
Dimethylglyoxime is a reagent that forms a bright red precipitate with nickel (Ni2) ions. This precipitate is insoluble in water and is often used as a confirmatory test for the presence of nickel ions in solution.
Dimethylglyoxime and Co2
Dimethylglyoxime also forms a precipitate with cobalt (Co2) ions, but the color of the precipitate is different. The precipitate formed with cobalt ions is pink, not red.
Nessler's reagent and Hg2
Nessler's reagent is used to detect the presence of ammonia (NH3) and its derivatives. It does not form a bright red precipitate with mercury (Hg2) ions.
Conclusion
Based on the observations and known reactions, the correct answer is option A: Dimethylglyoxime and Ni2. The formation of a bright red precipitate in the alkaline solution of the salt confirms the presence of nickel (Ni2) ions, and dimethylglyoxime is the reagent responsible for this reaction.
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Community Answer
During the qualitative analysis of salt with cationy2+, addition of a ...
On addition of dimethylglyoxime to alkaline solution of Ni+2, a bright red ppt. is obtained.
Ni+2 + 2dmg → [Ni(dmg)2]+2 (Bright red ppt.)
Ni+2 + 2dmg → [Ni(dmg)2]+2 (Bright red ppt.)
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During the qualitative analysis of salt with cationy2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are:a)Dimethylglyoxime and Ni2+b)Dimethylglyoxime and Co2+c)Nesslers reagent and Hg2+d)Nesslers reagent and Ni2+Correct answer is option 'A'. Can you explain this answer?
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During the qualitative analysis of salt with cationy2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are:a)Dimethylglyoxime and Ni2+b)Dimethylglyoxime and Co2+c)Nesslers reagent and Hg2+d)Nesslers reagent and Ni2+Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about During the qualitative analysis of salt with cationy2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are:a)Dimethylglyoxime and Ni2+b)Dimethylglyoxime and Co2+c)Nesslers reagent and Hg2+d)Nesslers reagent and Ni2+Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During the qualitative analysis of salt with cationy2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are:a)Dimethylglyoxime and Ni2+b)Dimethylglyoxime and Co2+c)Nesslers reagent and Hg2+d)Nesslers reagent and Ni2+Correct answer is option 'A'. Can you explain this answer?.
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