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Questions and Answers
What is the purpose of adding ammonium chloride before adding ammonium hydroxide in the precipitation of the iron group (III) in qualitative analysis?
What is the purpose of adding ammonium chloride before adding ammonium hydroxide in the precipitation of the iron group (III) in qualitative analysis?
- To decrease the concentration of –OH ions (correct)
- To prevent interference by phosphate ions
- To increase the concentration of Cl– ions
- To increase the concentration of NH4+ ions
What is the correct sequence of ligands in the order of decreasing field strength?
What is the correct sequence of ligands in the order of decreasing field strength?
- CO > H2O > S2− > F−
- CO > H2O > F− > S2− (correct)
- OH > F− > CO > S2−
- CO > F− > H2O > S2−
What is the correct decreasing order of basic strength of the conjugate bases CH2Br, NaOH, RO, CH3COO, and Cl?
What is the correct decreasing order of basic strength of the conjugate bases CH2Br, NaOH, RO, CH3COO, and Cl?
- RO > OH > CH3COO > Cl
- OH > RO > CH3COO > Cl (correct)
- RO > CH3COO > OH > Cl
- Cl > OH > RO > CH3COO
What is the pressure of H2 (in bar) required to make the emf of a hydrogen electrode zero in pure water at 25°C?
What is the pressure of H2 (in bar) required to make the emf of a hydrogen electrode zero in pure water at 25°C?
What is the correct order of ligands in the order of decreasing field strength?
What is the correct order of ligands in the order of decreasing field strength?
What is the role of ammonium hydroxide in qualitative analysis?
What is the role of ammonium hydroxide in qualitative analysis?
What is the effect of adding HBr to the ether?
What is the effect of adding HBr to the ether?
What is the relationship between A and C in the given reaction?
What is the relationship between A and C in the given reaction?
What is the identity of B and C in the given reaction?
What is the identity of B and C in the given reaction?
What is the type of mechanism step involved in the given reaction?
What is the type of mechanism step involved in the given reaction?
