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Metals Reaction with Acid

If metallic c...

Question

If metallic copper is heated with conc. sulphuric acid, various types of products are formed depending on standard reduction potential, then which reaction is possible?

A

C u + 2 H^{+} \to C u^{2 +} + H_{2}

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B

C u^{2 +} + H_{2} \to C u + 2 H^{+}

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C

Both (a) and (b)

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D

None of the above

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Solution

The correct option is B $C u^{2 +} + H_{2} \to C u + 2 H^{+}$
From electrode potential series, it can be seen that-Cu ion has higher tendency to get electron than hydrogen ion.
So it will oxidise hydrogen gas into hydrogen ion.

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Similar questions

Q. When metallic copper is shaken with a solution of a copper salt, the reaction

C u + {C u}^{2 +} \to 2 {C u}^{+}

proceeds. When equilibrium is established at

298 K

[{C u}^{2 +}] / {[{C u}^{+}]}^{2} = 1.66 \times 10^{6}

{(m o l {d m}^{- 3})}^{- 1}

. If the standard potential of the

{C u}^{2 +} | C u

+ 0.337 V

, what is the standard (reduction) potential of

{C u}^{+} | C u

Half Reaction	Eo
I. $M g \to {M g}^{2 +} + 2 e^{-}$	2.37V
II. $M n \to {M n}^{2 +} + 2 e^{-}$	1.03V
III. $H_{2} \to 2 H^{+} + 2 e^{-}$	0.00V
IV. $C u \to {C u}^{2 +} + 2 e^{-}$	-0.16V

From the above experimental data what will be the standard reduction potential which represents spontaneous process?

Q. The standard reduction potentials of

C u^{2 +} / C u

C u^{2 +} / C u^{+}

0.337 V

0.153 V

The standard electrode potential of

C u^{+} / C u

Q. The standard reduction potentials of

{C u}^{2 +} / C u

{C u}^{2 +} / {C u}^{+}

0.337

0.153

V respectively. The standard electrode potential of

{C u}^{+} / C u

Q. Refer to the following experimental data.

Half Reaction	Eo
I. $M g \to {M g}^{2 +} + 2 e^{-}$	2.37V
II. $M n \to {M n}^{2 +} + 2 e^{-}$	1.03V
III. $H_{2} \to 2 H^{+} + 2 e^{-}$	0.00V
IV. $C u \to {C u}^{2 +} + 2 e^{-}$	-0.16V

What will be the standard reduction potential for the reaction:

M g + M n^{2 +} \to M g^{2 +} + M n

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