JEE Main 2024 (Online) 31st January Morning Shift | Electrochemistry Question 22 | Chemistry

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JEE Main 2024 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

-1

Identify the factor from the following that does not affect electrolytic conductance of a solution.

The nature of solvent used.

The nature of the electrolyte added.

The nature of the electrode used.

Concentration of the electrolyte.

JEE Main 2024 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

Alkaline oxidative fusion of $$\mathrm{MnO}_2$$ gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are

$$\mathrm{Mn}_2 \mathrm{O}_3$$ and $$\mathrm{MnO}_4^{2-}$$

$$\mathrm{Mn}_2 \mathrm{O}_7$$ and $$\mathrm{MnO}_4^{-}$$

$$\mathrm{MnO}_4^{2-}$$ and $$\mathrm{MnO}_4^{-}$$

$$\mathrm{MnO}_4^{2-}$$ and $$\mathrm{Mn}_2 \mathrm{O}_7$$

JEE Main 2024 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

Reduction potential of ions are given below:

$$\begin{array}{ccc} \mathrm{ClO}_4^{-} & \mathrm{IO}_4^{-} & \mathrm{BrO}_4^{-} \\ \mathrm{E}^{\circ}=1.19 \mathrm{~V} & \mathrm{E}^{\circ}=1.65 \mathrm{~V} & \mathrm{E}^{\circ}=1.74 \mathrm{~V} \end{array}$$

The correct order of their oxidising power is :

$$\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}$$

$$\mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}$$

$$\mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}$$

$$\mathrm{BrO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{ClO}_4^{-}$$

JEE Main 2024 (Online) 27th January Evening Shift

MCQ (Single Correct Answer)

-1

Which of the following statements is not correct about rusting of iron?

Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.

Dissolved acidic oxides $$\mathrm{SO}_2, \mathrm{NO}_2$$ in water act as catalyst in the process of rusting.

Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.

When $$\mathrm{pH}$$ lies above 9 or 10, rusting of iron does not take place.

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