English

Assertion: Cu is less reactive than hydrogen. Reason: ECu2+CuΘ is negative. - Chemistry

Advertisements
Advertisements

Question

Assertion: Cu is less reactive than hydrogen.

Reason: `E_((Cu^(2+))/(Cu))^Θ` is negative.

Options

  • Both assertion and reason are true and the reason is the correct explanation of assertion.

  • Both assertion and reason are true and the reason is not the correct explanation of assertion.

  • Assertion is true but the reason is false.

  • Both assertion and reason are false.

  • Assertion is false but reason is true.

MCQ

Solution

Assertion is true but the reason is false.

Explanation:

Cu is less reactive than hydrogen because E°u2+ Cu is positive.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Electrochemistry - Exercises [Page 42]

APPEARS IN

NCERT Exemplar Chemistry [English] Class 12
Chapter 3 Electrochemistry
Exercises | Q V. 56. | Page 42

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Can copper sulphate solution be stored in an iron vessel? Explain.


Calculate emf of the following cell at 25 °C :

Fe|Fe2+(0.001 M)| |H+(0.01 M)|H2(g) (1 bar)|Pt (s)

E°(Fe2+| Fe)0.44 V E°(H+ | H20.00 V


Depict the galvanic cell in which the reaction \[\ce{Zn(s) + 2Ag+(aq) → Zn^{2+}(aq) + 2Ag(s)}\] takes place. Further show:

  1. Which of the electrode is negatively charged?
  2. The carriers of the current in the cell.
  3. Individual reaction at each electrode.

Galvanic or a voltaic cell converts the chemical energy liberated during a redox reaction to ____________.


Standard hydrogen electrode operated under standard conditions of 1 atm Hpressure, 298 K, and pH = 0 has a cell potential of ____________.


Which cell will measure standard electrode potential of copper electrode?


Use the data given in below find out which of the following is the strongest oxidising agent.

`"E"_("Cr"_2"O"_7^(2-)//"Cr"^(3+))^⊖`= 1.33 V `"E"_("Cl"_2//"Cl"^-)^⊖` = 1.36 V

`"E"_("MnO"_4^-//"Mn"^(2+))^⊖` = 1.51 V `"E"_("Cr"^(3+)//"Cr")^⊖` = - 0.74 V


The positive value of the standard electrode potential of Cu2+/Cu indicates that:

(i) this redox couple is a stronger reducing agent than the H+/H2 couple.

(ii) this redox couple is a stronger oxidising agent than H+/H2 .

(iii) Cu can displace H2 from acid.

(iv) Cu cannot displace H2 from acid.


What does the negative sign in the expression `"E"^Θ ("Zn"^(2+))//("Zn")` = − 0.76 V mean?


Represent the cell in which the following reaction takes place.The value of E˚ for the cell is 1.260 V. What is the value of Ecell?

\[\ce{2Al (s) + 3Cd^{2+} (0.1M) -> 3Cd (s) + 2Al^{3+} (0.01M)}\]


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×