Download App

7. Redox reactions — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry7. Redox reactions1 Mark
MCQ
The oxidation state of $Cr$ in $Cr_2O_6$ is
  • A
    $-6$
  • B
    $+12$
  • ✓
    $+6$
  • D
    $+4$
✓

Answer

Correct option: C.
$+6$
c
$CrO _6$ does not exist but theoretically we can say that the oxidation state of  $Cr$ in $CrO _6$ is $+6$ as maximum oxidation state of $Cr$ is $+6$ and it has its maximum oxidation state in $CrO _6$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 7. Redox reactions→7. Redox reactions — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Millimoles of calcium hydroxyide required to produce $100\,mL$ of the aqueous solution of $pH \,12$ is $x \times 10^{-1}$. The value of $x$ is $..............$. (Nearest integer).Assume complete dissociation.
→
Which of the following can exhibit cis-trans isomerism
→
How do we differentiate between Fe3+ and Cr3+ in group III?
→
$\begin{array}{*{20}{c}}
  {C{H_3} - CH - C{H_2} - C{H_3}\xrightarrow[{hv}]{{C{l_2}}}(x)} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array} =$ Number of monochloro product including stereoisomers.
→
Choose the $CORRECT$ reason for fluorine being a stronger oxidising agent than chlorine 

$(I)$ Low enthalpy of dissociation of $F-F$ bond

$(II)$ High hydration enthalpy of $F^-$

$(III)$ Low atomisation enthalpy of $F_2$

→
The concentration of hydrogen ion $[{H^ + }]$ in $0.01 \,M$  $HCl$ is
→
The percentage Ionic character of the $HBr$ molecule, if the dipole moment is $0.63\, D$ & $HBr$ bond length $187.5\, Pm$ is ?............... $\%$
→
Given below are two statements: One is labelled as Assertion ($A$) and the other is labelled as Reason ($R$)

Assertion ($A$): Enthalpy of neutralisation of strong monobasic acid with strong monoacidic base is always $-57 \mathrm{~kJ} \mathrm{~mol}^{-1}$

Reason ($R$): Enthalpy of neutralisation is the amount of heat liberated when one mole of $\mathrm{H}^{+}$ions furnished by acid combine with one mole of ${ }^{-} \mathrm{OH}$ ions furnished by base to form one mole of water. In the light of the above statements, choose the correct answer from the options given below.

→
  $R - C{H_2} - CC{l_2} - R \xrightarrow{{{\text{Reagent}}}}R - C \equiv C - R$ The reagent is
→
On bromination, propionic acid yields two isomeric $2-$bromopropionic acids. This pair is an important example of
→