15 Questions
Which group reagent is used for the classification of Fe3+, Cr3+, and Al3+ cations?
Ammonium chloride (NH4Cl) + Ammonium hydroxide
Which cations are precipitated in the form of sulphides from an ammonical solution using NH4Cl + NH4OH + H2S?
Zn2+ and Co2+
Which reagent is used to precipitate CaCO3, BaCO3, and SrCO3 from a solution containing Ca2+, Ba2+, and Sr2+ cations?
NH4Cl + NH4OH + (NH4)2CO3
Which group of cations has sparingly soluble hydroxides when treated with NH4Cl + NH4OH?
Fe3+, Cr3+, Al3+
Which group of cations does not have a specific reagent for classification?
Group (VI)
Which group reagent is used for the classification of Fe3+, Cr3+, Al3+ cations?
Ammonium chloride (NH4Cl) + Ammonium hydroxide
Which cations are precipitated in the form of sulphides from an ammonical solution using NH4Cl + NH4OH + H2S as the group reagent?
Mn2+, Zn2+, Co2+, Ni2+
Which group reagent is used for the classification of Ca2+, Ba2+, Sr2+ cations?
NH4Cl + NH4OH + (NH4)2CO3
Which group of cations has no specific reagent for classification?
Group VI
Which cations are precipitated as sparingly soluble hydroxides using NH4Cl + NH4OH as the group reagent?
Fe3+, Cr3+, Al3+
Match the following cation groups with their corresponding group reagents:
Group (I) = Hydrochloric acid (HCl) Group (II) = Hydrogen sulphide (H2S) (in acid medium) Group (III) = NH4Cl + NH4OH Group (IV) = NH4Cl +NH4OH+ H2S
Match the following cation groups with their precipitated forms:
Group (V) = CaCO3, BaCO3, SrCO3 Group (VI) = Has no specific reagent Group (IV) = MnS, ZnS, CoS, NiS Group (III) = Al(OH)3, Cr(OH)3, Fe(OH)3
Match the following cation groups with the character of their precipitates:
Group (III) = Sparingly soluble hydroxides Group (VI) = Has no specific reagent Group (IV) = Precipitated in form of sulphides from ammonical solution Group (V) = Precipitated form NH4Cl + NH4OH+ (NH4)2CO3
Match the following cations with the corresponding group reagent for their classification:
Fe3+, Cr3+, Al3+ = NH4Cl + NH4OH Mn2+, Zn2+, Co2+, Ni2+ = NH4Cl +NH4OH+ H2S Ca2+, Ba2+, Sr2+ = NH4Cl + NH4OH+ (NH4)2CO3 Group (VI) cations = Has no specific reagent
Match the following cations with the corresponding precipitated forms when treated with the group reagents:
Fe3+, Cr3+, Al3+ = Al(OH)3, Cr(OH)3, Fe(OH)3 Mn2+, Zn2+, Co2+, Ni2+ = MnS, ZnS, CoS, NiS Ca2+, Ba2+, Sr2+ = CaCO3, BaCO3, SrCO3 Group (VI) cations = Has no specific reagent
Test your knowledge of qualitative analysis of cations with this quiz. Explore the classification of cations into six groups and the common reagents used for their separation. Challenge yourself with questions on the use of hydrochloric acid, hydrogen sulphide, ammonium chloride, and more in the analysis of cations.
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