Question:
First element in 3d series which shows +2, +3, +4, +6 oxidation state
First element in 3d series which shows +2, +3, +4, +6 oxidation state
Show Hint
Chromium (Cr) is unique in the 3d series for having multiple oxidation states, including +2, +3, +4, and +6, which makes it the correct choice for this question.
Updated On: Apr 18, 2026
- Cr
- Mn
- Fe
- Co
- Ni
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
In the 3d transition series, different elements exhibit various oxidation states based on the number of electrons they can lose. The first element in the 3d series to exhibit +2, +3, +4, and +6 oxidation states is Chromium (Cr).
Step 1: Oxidation states of elements.
- Chromium (Cr) can exhibit +2, +3, and +6 oxidation states. It is the first in the series to show these states, and +4 state is possible under some specific conditions.
- Manganese (Mn) shows +2, +3, +4, and +6 oxidation states but starts with +2.
- Iron (Fe) typically shows +2 and +3 oxidation states. - Cobalt (Co) typically shows +2 and +3 oxidation states, but not +4 and +6.
- Nickel (Ni) primarily shows +2 oxidation state.
Step 2: Conclusion.
Chromium is the first element in the 3d series that exhibits +2, +3, +4, and +6 oxidation states, making it the correct answer.
Final Answer:} (A) Cr
- Chromium (Cr) can exhibit +2, +3, and +6 oxidation states. It is the first in the series to show these states, and +4 state is possible under some specific conditions.
- Manganese (Mn) shows +2, +3, +4, and +6 oxidation states but starts with +2.
- Iron (Fe) typically shows +2 and +3 oxidation states. - Cobalt (Co) typically shows +2 and +3 oxidation states, but not +4 and +6.
- Nickel (Ni) primarily shows +2 oxidation state.
Step 2: Conclusion.
Chromium is the first element in the 3d series that exhibits +2, +3, +4, and +6 oxidation states, making it the correct answer.
Final Answer:} (A) Cr
Was this answer helpful?
0
0
Top KEAM Chemistry Questions
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
- $4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :
- Green chemistry deals with
- Neopentyl bromide undergoes dehydrohalogenation to give alkenes even though it has no $\beta$- hydrogen. This is due to
- Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
View More Questions
Top KEAM Some Important Compounds of Transition Elements Questions
- In the first row transition metals, the element that exhibits only +3 oxidation state is
- Which of the following pairs of aquated first transition metal ions have the same color?
- The unit of an universal constant is cm\(^{-1}\). What is the constant?
- Which of the following molecule has the most polar bond?
ΔS would be negative for which of the following reactions?
(I) \( {CaCO}_3(s) \rightarrow {CaO}(s) + {CO}_2(g) \)
(II) \( {Ag}^+(aq) + {Cl}^-(aq) \rightarrow {AgCl}(s) \)
(III) \( {N}_2(g) + 3{H}_2(g) \rightarrow 2{NH}_3(g) \)
Choose the correct answer from the codes given below:
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions