MolSynapsequestion bank

MolSynapse / Question bank / Qualitative Analysis: Cations / Group III cations (Fe, Al, Cr)

NEET levelSingle correct optionDifficulty 1 of 3qc184

The group reagent for group III cations ( $Fe X^{3 +}$ , $Al X^{3 +}$ , $Cr X^{3 +}$ ) is

Adilute HCl
B $NH X_{4} Cl$ and $NH X_{4} OH$
C $(NH X_{4}) X_{2} CO X_{3}$
D $H X_{2} S$ with dilute HCl

Answer: B

Group III hydroxides precipitate when

NH X_{4} OH

is added in presence of

NH X_{4} Cl

(which controls

[OH X^{-}]

). The others are group I, II and V reagents.

Practice Qualitative Analysis: Cations More on Group III cations (Fe, Al, Cr)

Previous questionNext question

More questions on Group III cations (Fe, Al, Cr)

Select the correct statements about the preparation of the filtrate for group III. JEE Advanced level
Which of the following statements about chromium species are correct? JEE Advanced level
Select the correct statements (high-spin unless a strong-field ligand is stated). JEE Advanced level
The precipitate obtained when ammonium hydroxide is added to FeCl3 solution (in presence of NH4Cl) is NEET level
Addition of NH4OH (with NH4Cl) to AlCl3 solution gives NEET level
Potassium thiocyanate added to a solution of Fe^3+ gives NEET level