JEE Main 2017 (Offline) | Electrochemistry Question 184 | Chemistry

Given
$$E_{C{l_2}/C{l^ - }}^o$$ = 1.36 V, $$E_{C{r^{3 + }}/Cr}^o$$ = - 0.74 V
$$E_{C{r_2}{O_7}^{2 - }/C{r^{3 + }}}^o$$ = 1.33 V, $$E_{Mn{O_4}^ - /Mn ^{2+}}^o$$ = 1.51 V
Among the following, the strongest reducing agent is :

Mn²⁺

Cr³⁺

Cl^–

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MCQ (Single Correct Answer)

-1

Identify the correct statement :

Iron corrodes in oxygen-free water.

Iron corrodes more rapidly in salt water because its electrochemical potential is higher.

Corrosion of iron can be minimized by forming a contact with another metal with a higher reduction potential.

Corrosion of iron can be minimized by forming an impermeable barrier at its surface.

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MCQ (Single Correct Answer)

-1

Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K) is :

2.24 L

4.48 L

6.72 L

8.96 L

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MCQ (Single Correct Answer)

-1

What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M ZnSO₄?

The copper metal will dissolve and zinc metal will be deposited.

The copper metal will dissolve with evolution of hydrogen gas.

The copper metal will dissolve with evolution of oxygen gas.

No reaction will occur.