Home
Class 12
CHEMISTRY
State the reason for the following : (...

State the reason for the following :
(i) Cu (I) ion is not stable in an aqueous solution.
(ii) Unlike `Cr^(3+),Mn^(2+),Fe^(3+)` and the subsequent other `M^(2+)` ions of the 3d series, the 4d and 5d series metals generally do not form stable oxidation states.

Text Solution

Verified by Experts

(ii) `Cr^(2+)` is stronger reducing agent than `Fe^(2+)`
Reason : `d^(4) to d^(3)` occurs in case of `Cr^(2+) ` to `Cr^(3+)`
But `d^(6) to d^(5)` occurs in case of `Fe^(2+)` to `Fe^(3+)`
In a medium (like water) `d^(3)` is more stable as compared to `d^(5)`.
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET-II|32 Videos

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET-III|31 Videos

  • SAMPLE PAPER 2019

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION: D|1 Videos

Similar Questions

Explore conceptually related problems

Complete the following chemical equation: (i) MnO_(4)^(-)(aq)+s_(2)O_(3)^(2-)(aq)+H_(2)O(I) to (ii) MnO_(4)^(-) +NO_(2)^(-)+H^(+) to State reason for the following : (i) Cu(I) ion is not stable in an aqueous solution. (ii) Unlike Cr^(3+),Mn^(2+),Fe^(3+) and the subsequently other M^(2+) ions of the 3d series of elements, the 4d and the 5d series metals generally do not form stable cationic species.

Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?

Assign reasons for the following : (i) Copper (I) ion is not known in aqueous solution. (ii) Actinoids exhibit greater range of oxidation states than lanthanoids.

Assign a reasons for the following . (i) Copper (I) ion is not known to exist in aqueous solutions. (ii) Both O_(2) and F_(2) stabilize high oxidation states of transition metals but the ability of oxygen to do so exceeds that of fluorine.

In 3d series , Mn shows highest oxidation state . Why ?

In 3d series , Mn shows highest oxidation state . Why ?

Fe can displace which of the following ions from their aqueous solutions? (a) Na^(+) (b) Zn^(2+) (c) Cu^(2+) (d) Ag^(+)

Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other,in:

How would you account for the following : (i) Cr^(2+) is reducing in nature while with the same d-orbital configuration (d^(4)),Mn^(2+) is oxidising in nature. (ii) In the transition series of metals, the metal which exhibits the greatest number of oxidation states occurs in the middle of the series.

Metal-Metal bonding is more frequent in 4d or 5d series than in 3d series due to