JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Amongst the following, identify the species with an atom in \(+6\) oxidation state
- A \(CrO_2Cl_2\)
- B \([Cr(CN)_6]^{3-}\)
- C \(Cr_2O_3\)
- D \([MnO_4]^-\)
Answer & Solution
Correct Answer
(A) \(CrO_2Cl_2\)
Step-by-step Solution
Detailed explanation
\(CrO_2Cl_2\) Let \(O\). No. of \(Cr\, = x\) \(\therefore \) \(x +2 (-2) +2 (-1 )\,=0\) \(x - 4 - 2\,=0\) \(\therefore \) \(x\, = +6\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right element, except noble gases, are respectively.JEE Mains 2026 Easy
- Prolonged heating is avoided during the preparation of ferrous ammonium sulphate toJEE Mains 2023 Hard
- The \(IUPAC\) name of the following compound is
JEE Mains 2019 Hard - Given below are two statements :
Statement I : On passing \(HCl _{( g )}\) through a saturated solution of \(BaCl _2\), at room temperature white turbidity appears.
Statement II : When HCl gas is passed through a saturated solution of NaCl , sodium chloride is precipitated due to common ion effect.
In the light of the above statements, choose the most appropriate answer from the options given below:JEE Mains 2024 Medium - Fructose and glucose can be distinguished byJEE Mains 2019 Medium
- In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :JEE Mains 2024 Medium
More PYQs from JEE Mains
- The values of \(\lambda\) and \(\mu\) for which the system of linear equations \(x+y+z=2\) \(x+2 y+3 z=5\) \(x+3 y+\lambda z=\mu\) has infinitely many solutions are, respectivelyJEE Mains 2020 Medium
- A zener diode of power rating \(2\, {W}\) is to be used as a voltage regulator. If the zener diode has a breakdown of \(10 \,{V}\) and it has to regulate voltage fluctuated between \(6\, {V}\) and \(14\, {V}\), the value of \({R}_{{s}}\) for safe operation should be \(....\Omega\)
JEE Mains 2021 Hard - Two identical solid spheres each of mass \(2\,kg\) and radii \(10\,cm\) are fixed at the ends of a light rod. The separation between the centres of the spheres is \(40\,cm\). The moment of inertia of the system about an axis perpendicular to the rod passing through its middle point is \(........... \times 10^{-3}\,kg - m ^2\)JEE Mains 2023 Medium
- When \(10 \mathrm{~mL}\) of an aqueous solution of \(\mathrm{Fe}^{2+}\) ions was titrated in the presence of dil \(\mathrm{H}_{2} \mathrm{SO}_{4}\) using diphenylamine indicator, \(15 \mathrm{~mL}\) of \(0.02 \mathrm{M}\) solution of \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) was required to get the end point. The molarity of the solution containing \(\mathrm{Fe}^{2+}\) ions is \(\mathrm{X} \times 10^{-2} \mathrm{M}\). The value of \(\mathrm{x}\) is \(....\) (Nearest integer)JEE Mains 2021 Medium
- If \({ }^{20} \mathrm{C}_{\mathrm{r}}\) is the co-efficient of \(\mathrm{x}^{\mathrm{r}}\) in the expansion of \((1+x)^{20}\), then the value of \(\sum_{r=0}^{20} r^{2}\,\,{ }^{20} C_{r}\) is equal to :JEE Mains 2021 Hard
- Let the coefficients of three consecutive terms \(T_r, T_{r+1}\) and \(T_{r+2}\) in the binomial expansion of \((a+b)^{12}\) be in a G.P. and let \(p\) be the number of all possible values of \(r\). Let \(q\) be the sum of all rational terms in the binomial expansion of \((\sqrt[4]{3}+\sqrt[3]{4})^{12}\). Then \(\mathrm{p}+\mathrm{q}\) is equal to :JEE Mains 2025 Medium