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Questions and Answers
What is the color of the flame caused by calcium chloride when viewed through cobalt glass?
What is the color of the flame caused by calcium chloride when viewed through cobalt glass?
Which zone of a nonluminous Bunsen flame consists largely of incandescent carbon?
Which zone of a nonluminous Bunsen flame consists largely of incandescent carbon?
What color does Tl impart to the nonluminous Bunsen flame?
What color does Tl impart to the nonluminous Bunsen flame?
In the micro scale of qualitative analysis, by what factor is the quantity of a substance employed reduced?
In the micro scale of qualitative analysis, by what factor is the quantity of a substance employed reduced?
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Which substance may be indicated by a metallic deposit obtained after sublimation?
Which substance may be indicated by a metallic deposit obtained after sublimation?
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What color does Sb impart to the nonluminous Bunsen flame?
What color does Sb impart to the nonluminous Bunsen flame?
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What is the term for an entity providing a pair of electrons in a coordinate covalent bond?
What is the term for an entity providing a pair of electrons in a coordinate covalent bond?
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Which group of element hydroxides in aqueous solutions has the greatest alkalinity in nature?
Which group of element hydroxides in aqueous solutions has the greatest alkalinity in nature?
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Among the Group IA elements, which one does not follow the trend of increasing oxidation potentials?
Among the Group IA elements, which one does not follow the trend of increasing oxidation potentials?
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What is an advantage of using Benedict’s solution over Fehling’s solution?
What is an advantage of using Benedict’s solution over Fehling’s solution?
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What is the chemical name for Thenard’s blue?
What is the chemical name for Thenard’s blue?
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Which substance is also known as White Precipitate?
Which substance is also known as White Precipitate?
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Which route of administration is approved for administering Iron Dextran Injection?
Which route of administration is approved for administering Iron Dextran Injection?
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Which metal will not react with acids to produce hydrogen?
Which metal will not react with acids to produce hydrogen?
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What does a white precipitate after the addition of excess ammonium carbonate indicate?
What does a white precipitate after the addition of excess ammonium carbonate indicate?
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How is a basic or 'sub' salt prepared?
How is a basic or 'sub' salt prepared?
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Which substance is efflorescent in nature?
Which substance is efflorescent in nature?
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Which condition has not been treated with gold?
Which condition has not been treated with gold?
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Which element occurs lowest in the electromotive series of metals?
Which element occurs lowest in the electromotive series of metals?
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Which metal reacts with acids to produce hydrogen?
Which metal reacts with acids to produce hydrogen?
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What type of salt is potassium alum an example of?
What type of salt is potassium alum an example of?
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Which compound is an example of a sparingly soluble acetate salt in water?
Which compound is an example of a sparingly soluble acetate salt in water?
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In the presence of what, does yellow mercuric oxide turn red?
In the presence of what, does yellow mercuric oxide turn red?
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What is corrosive sublimate?
What is corrosive sublimate?
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What compound is recommended as the calcium salt electrolyte replenisher due to its 1:1 ratio of calcium to phosphorus?
What compound is recommended as the calcium salt electrolyte replenisher due to its 1:1 ratio of calcium to phosphorus?
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What mixture, made by boiling lime and sublime sulfur, is used as an antifungal agent?
What mixture, made by boiling lime and sublime sulfur, is used as an antifungal agent?
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Which solution refers to Nordhausen acid?
Which solution refers to Nordhausen acid?
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What can prevent the precipitation of copper salts?
What can prevent the precipitation of copper salts?
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Which option correctly describes reduced iron?
Which option correctly describes reduced iron?
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Study Notes
Flame Colors and Reactions
- Calcium chloride produces an orange-red flame when viewed through cobalt glass.
- The outer zone of a nonluminous Bunsen flame contains incandescent carbon.
- Thallium (Tl) imparts a green color to the nonluminous Bunsen flame.
- Antimony (Sb) gives a blue color to the nonluminous Bunsen flame.
Qualitative Analysis and Preparations
- In microscale qualitative analysis, the quantity of a substance used is reduced by a factor of 100.
- A metallic deposit obtained after sublimation may indicate the presence of certain metals.
- A basic or 'sub' salt is prepared by neutralizing a portion of an acid with an insufficient amount of base.
Chemical Compounds and Their Characteristics
- Thenard’s blue is the chemical name for a complex cobalt compound.
- The substance known as White Precipitate refers to mercurous chloride (Hg2Cl2).
- Calcium salt electrolyte replenisher recommended for its 1:1 ratio of calcium to phosphorus is calcium phosphate.
- Yellow mercuric oxide turns red in the presence of heat.
Administration Routes and Reactions
- Iron Dextran Injection is approved for intramuscular administration.
- Hydrogen is not produced when certain metals react with acids; for example, gold does not react.
- Potassium alum is an example of a double salt.
Conditions and Compounds
- Efflorescent substances lose water vapor and can be indicated by their tendency to appear powdery.
- Nordhausen acid refers to a solution of sulfuric acid containing nitrous oxide.
- Copper salts precipitation can be prevented by complexing agents like ammonia.
Properties of Metals and Compounds
- Reduced iron refers to iron obtained by reduction processes; it is generally less oxidized.
- The lowest element in the electromotive series of metals is gold.
- Sparingly soluble acetate salts in water include lead(II) acetate.
- The mixture used as an antifungal agent is made of lime and sublime sulfur.
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Description
Test your knowledge on the upper oxidizing zone of a nonluminous Bunsen flame, detecting less volatile substances, and identifying the color imparted by Sb in the flame. Choose the correct answers from the options provided.
