The Question is from neet-chemistry , and it was created by the author A.RAMA NAGESWARARAO

Question

Silver, mercury and lead have been placed in same group of qualitative analysis, because they form:

A.RAMA NAGESWARARAO · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
**Primary Concept**: Qualitative analysis and group separation based on solubility.
**Related Topics**: Solubility rules, precipitation reactions, common ion effect.
**Prerequisites**: Knowledge of basic solubility rules, especially for chlorides.
## SOLUTION PATHWAY
**Given Information**:
   - Silver, mercury, and lead are grouped together in qualitative analysis.
   - The reason for this grouping is based on similar chemical behavior.
**Method & Steps**:
1. **Understanding Qualitative Analysis Grouping:** Qualitative analysis groups ions based on their similar chemical reactions with specific reagents. The first group of metal ions are usually precipitated as chlorides.
Reasoning: Group separation is based on selective precipitation.
Formula/Rule: Solubility rules dictate which precipitates form.
2. **Analyzing the Options:**
   - **Option A (Carbonates soluble in dilute HNO3):** While carbonates of some metal ions are soluble in dilute nitric acid, this is not the defining characteristic for this particular group. Carbonates are not generally used for the initial separation of this group.
   - **Option B (Nitrates):** Most nitrates are soluble, so they are not useful for selective precipitation. They are not generally used to separate the first group of metal ions.
   - **Option C (Insoluble chlorides):** Silver(I), Mercury(I), and Lead(II) form insoluble chlorides, making this the correct answer and the foundation of their grouping in qualitative analysis.
   - **Option D (Same type of coloured compounds):** While some compounds of these metals are coloured, this is not the basis of their separation or grouping during qualitative analysis.
3. **Final Step:**
Result: The correct answer is C.
Verification: The solubility rules for chlorides are the basis for the first group in qualitative analysis.
 ## OPTION ANALYSIS
[A] :x: Carbonates are not used to separate these ions.
[B] :x: Nitrates are generally soluble, not precipitates.
[C] ✓: Silver, mercury, and lead form insoluble chlorides.
[D] :x: The color of the compounds is not the basis for grouping.
 ## LEARNING AIDS
**Common Mistakes**:
1. **Confusing Solubility Rules**: Not knowing the solubility rules for chlorides can lead to the wrong answer.
2. **Misunderstanding Qualitative Analysis**: Not understanding the purpose of group reagents in qualitative analysis can cause confusion.
**Quick Tips**:
1. **Memorize Key Solubility Rules**: Knowing the common solubility rules can help quickly eliminate incorrect options.
2. **Think about Group Reagents**: Qualitative analysis groups are based on precipitation with specific reagents, usually starting with chloride precipitation.

A.RAMA NAGESWARARAO · Answer

Carbonates soluble in dilute ${\rm{HN}}{{\rm{O}}_3}$

A.RAMA NAGESWARARAO · Answer

Nitrates

A.RAMA NAGESWARARAO · Answer

The correct Option is "Insoluble chlorides"

A.RAMA NAGESWARARAO · Answer

Same type of coloured compounds

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