CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following cations (i.e., basic radicals) forms colored (not white) precipitate with aqueous solution of potassium iodide but the precipitate does not dissolve in excess of reagent ?

A
Hg2+
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Hg2+2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Bi3+
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Cu2+
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C Hg2+2
Option (B) is correct.

(a) Hg2++2IHgI2(red/scarlet)
HgI2+2I[HgI4]2(solublecomplex)

(b) Hg2+2+2IHg2I2(green)
Hg2I2+2I[HgI4]2+Hg(black)

(c) Bi3++3IBiI3(black)
BiI3+I[BiI4](orangecolorsolublecomplex)

(d) 2Cu2++5I2CuI(white)+I3

Therefore, we can see that in option B, the precipitate is not soluble in excess of the reagent and remain as black Mercury precipitate

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Hydrolysis
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon