TS EAMCET · Chemistry · Redox Reactions
What is the oxidation state of \(\mathrm{Cr}\), when the \(\mathrm{pH}\) of the aqueous solution of potassium dichromate changes from acidic to basic?
- A 5
- B 4
- C 6
- D 3
Answer & Solution
Correct Answer
(C) 6
Step-by-step Solution
Detailed explanation
Oxidation state of \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) (potassium dichromate) \(\Rightarrow \quad+2+2(x)+7(-2)=0\) \(2 x=12\) \(x=\frac{12}{2}=+6\)
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
- Among the following \(\mathrm{Cr}(\mathrm{III})\) complexes, which one will have the highest octahedral crystal field splitting?TS EAMCET 2020 Medium
- Which one of the following is not an example of condensation polymer?TS EAMCET 2024 Easy
- Find the reactants which on heating with alcoholic \(\mathrm{KOH}\) produces the compound
\(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2\). M
TS EAMCET 2019 Medium - The weight in grams of a non-volatile solute (mol. wt. 60) to be dissolved in \(90 \mathrm{~g}\) of water to produce a relative lowering of vapour pressure of 0.02 isTS EAMCET 2012 Easy
- In the following reaction, \(X\) and \(Y\) are respectively \(\mathrm{CH}_3 \mathrm{COOH}+\mathrm{NH}_3 \longrightarrow X \stackrel{\Delta}{\longrightarrow} Y+\mathrm{H}_2 \mathrm{O} \)TS EAMCET 2002 Medium
- Observe the following \(f\)-block elements \(\mathrm{Eu}(Z=63) ; \mathrm{Pu}(Z=94) ; \mathrm{Cf}(\mathrm{Z}=98) ; \mathrm{Sm}(\mathrm{Z}=62) ; \mathrm{Gd}\) \((\mathrm{Z}=64) ; \mathrm{Cm}(\mathrm{Z}=96)\) How many of the above have half-filled \(f\)-orbitals in their ground state?TS EAMCET 2024 Hard
More PYQs from TS EAMCET
- Let \(z=x+i y\) be a complex number, \(A=\{z /|z| \leq 2\} \text { and } B=\{z /(1-i) z+(1+i) \bar{z} \geq 4\}\) Then which one of the following options belongs to \(A \cap B\) ?TS EAMCET 2020 Easy
- \(\int \sqrt{x^2+x+1} d x \times \int \frac{1}{\sqrt{x^2+x+1}} d x\) is equal toTS EAMCET 2021 Hard
- Consider the motion of a particle described by \(x=a \cos t, y=a \sin t\) and \(z=t\). The trajectory traced by the particle as a function of time isTS EAMCET 2017 Easy
- A particle starts from origin at time \(t=0\) and moves in positive \(x\)-direction. Its velocity \(\mathbf{v}\) varies with times as \(\mathbf{v}=10 \hat{t} \mathrm{~cm} / \mathrm{s}\). The distance covered by the particle in \(8 \mathrm{~s}\) will beTS EAMCET 2018 Easy
- The heat required to convert 8 g of ice at a temperature of \(-20^{\circ} \mathrm{C}\) to steam at \(100^{\circ} \mathrm{C}\) is [Specific heat capacity of ice \(=2100 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}\), specific heat capacity of water \(=4200 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}\), latent heat of fusion of ice \(=336 \times 10^3 \mathrm{~J} \mathrm{~kg}^{-1}\) and latent heat of steam \(\left.=2.268 \times 10^6 \mathrm{Jkg}^{-1}\right]\)TS EAMCET 2025 Medium
- A bullet of mass \(10 \mathrm{~g}\) is fired horizontally with a velocity \(1000 \mathrm{~ms}^{-1}\) from a rifle situated at a height \(50 \mathrm{~m}\) above the ground. If the bullet reaches the ground with a velocity \(500 \mathrm{~ms}^{-1}\), the work done against air resistance in the trajectory of the bullet is : \(\left(g=10 \mathrm{~ms}^{-2}\right)\)TS EAMCET 2006 Medium