Assertion Cations of both `Cu(II)` group and `Fe(III)` group are precipitated by passing `H_(2)S` gas but former in dilute acidic medium while later in dilute alkaline medium. Reason Sulphides of `Cu(II)` group cations have lower solubility than that of `Fe(III)` group cations.
A
Both assertion and reason are correct and reason is the correct explanation of the assertion
B
Both assertion and reason are correct but reason is not the correct explanation of assertion
C
Assertion is correct but reason is incorrect
D
Assertion is incorrect but reason is correct
Text Solution
Verified by Experts
The correct Answer is:
A
Topper's Solved these Questions
QUALITATIVE ANALYSIS
IIT-JEE PREVIOUS YEAR (CHEMISTRY)|Exercise Test|9 Videos
PERIODIC CLASSIFICATION AND PERIODIC PROPERTIES
IIT-JEE PREVIOUS YEAR (CHEMISTRY)|Exercise COMPREHENSION_TYPE|3 Videos
S BLOCK ELEMENTS
IIT-JEE PREVIOUS YEAR (CHEMISTRY)|Exercise True/False|1 Videos
Similar Questions
Explore conceptually related problems
ZnS is not precipitated by passing H_(2)S in acidic medium but CuS is precipitated . The reason for it is
H_(2)S is passed through the solution in an acididc medium to precipitate the sulphides of group II cations, but in an alkaline medium to precipitate the sulphides of group IV cations because:
Sometimes yellow turbidity appears while passing H_(2)S gas even in slightly acidic medium in the absence of II group radicals. This is because:
On passing H_(2)S gas in II group sometimes the solution turns milky. It indicates the presence of
For the precipitation of cations of group four in the qualitative analysis, the medium is made alkaline before passing H_(2)S gas. The purpose of alkaline solution is
$ Sb(III) is not precipitated as sulphide when in its alkaline solution H_(2)S is passed. ! The concentration of S^(2+) ions in alkaline medium is inadequate for precipitation.
IIT-JEE PREVIOUS YEAR (CHEMISTRY)-QUALITATIVE ANALYSIS-Assertion and Reason