Question:medium

Oxidation state of Fe(iron) in complex formed in brown ring test

Updated On: Jan 13, 2026

Show Solution

Solution and Explanation

The correct answer is +3

Was this answer helpful?

Questions Asked in JEE Main exam

Consider the following compounds. Arrange these compounds in a n increasing order of reactivity with nitrating mixture. The correct order is :

JEE Main - 2026
Chemical Kinetics

View Solution

Let \( A, B, C \) be three \( 2\times2 \) matrices with real entries such that \[ B=(I+A)^{-1} \quad \text{and} \quad A+C=I. \] If \[ BC=\begin{bmatrix}1 & -5 \\-1 & 2\end{bmatrix} \quad \text{and} \quad B\begin{bmatrix}x_1\\x_2\end{bmatrix} =\begin{bmatrix}12\\-6\end{bmatrix}, \] then \( x_1+x_2 \) is:

JEE Main - 2026
Matrices and Determinants

View Solution

Six point charges are kept \(60^\circ\) apart from each other on the circumference of a circle of radius \( R \) as shown in figure. The net electric field at the center of the circle is ___________. (\( \varepsilon_0 \) is permittivity of free space)

JEE Main - 2026
Electric Charge

View Solution

For the matrices \( A = \begin{bmatrix} 3 & -4 \\ 1 & -1 \end{bmatrix} \) and \( B = \begin{bmatrix} -29 & 49 \\ -13 & 18 \end{bmatrix} \), if \( (A^{15} + B) \begin{bmatrix} x \\ y \end{bmatrix} = \begin{bmatrix} 0\\ 0 \end{bmatrix} \), then among the following which one is true?}

JEE Main - 2026
Matrices

View Solution

Oxidation state of Fe(iron) in complex formed in brown ring test

Solution and Explanation

Top Questions on Oxidation Number

Questions Asked in JEE Main exam