Download App

Electrochemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
MCQ
For the given cell, $\text{Mg}|\text{Mg}^{2+}||\text{Cu}^{2+}|\text{Cu}:$
  • A
    Mg is cathode.
  • B
    Cu is cathode.
  • C
    The cell reaction is $\text{Mg}+\text{Cu}^{2+}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{Mg}^{2+}+\text{Cu}$
  • D
    Cu is the oxidising agent.
✓

Answer

  1. Cu is cathode.
  2. The cell reaction is $\text{Mg}+\text{Cu}^{2+}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{Mg}^{2+}+\text{Cu}$

Explanation:

Left side of the cell represent oxidation half-cell and right side represent reduction half-cell.

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 Electrochemistry→Electrochemistry — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The rate for a first order reaction is $0.6932 \times {10^{ - 2}}\,mol\,{l^{ - 1}}\,mi{n^{ - 1}}$ and the initial concentration of the reactants is $1\,M$, ${T_{1/2}}$ is equal to ........ $\min$
→
Which of the following compounds will undergo decarboxylation on heating ?
→
$\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {PhMgBr{\text{ }} + {\text{ }}C{H_3}{\text{ }} - CN\xrightarrow[{{H_3}{O^ \oplus }}]{}(A)Ph - C - O - H\xrightarrow[{(2){H_3}O}]{{\left( 1 \right){\text{ }}excess{\text{ }}C{H_3}Li}}(A)} 

\end{array}$

Same product $(A)$ will form in both reactions $A$ is

→
General formula of primary alcohol is
→
The element the usually does $NOT$ show variable oxidation states is
→
${Image}$

The product $"A"$ and $"B"$ formed in above reactions are

→
Which of the following compound does not give Tollen’s test?
→
Match each coordination compound in List-$I$ with an appropriate pair of characteristics from List-$II$ and select the correct answer using the code given below the lists.

$\left\{ en = H _2 NCH _2 CH _2 NH _2\right.$; atomic numbers: $\left.Ti =22 ; Cr =24 ; Cp =27 ; Pt =78\right\}$

List-$I$ List-$II$
$P.$ $\left[ Cr \left( NH _3\right)_4 Cl _2\right) Cl ]$ $1.$ Paramagnetic and exhibits ionisation isomerism
$Q.$ $\left[ Ti \left( H _2 O \right)_5 Cl \right]\left( NO _3\right)_2$ $2.$ Diamagentic and exhibits cis-trans isomerism
$R.$ $\left[ Pt ( en )\left( NH _3\right) Cl \right] NO _3$ $3.$ Paramagentic and exhibits cis-trans isomerism
$S.$ $\left[ Co \left( NH _3\right)_4\left( NO _3\right)_2\right] NO _3$ $4.$ Diamagentic and exhibits ionisation isomerism

Codes: $ \quad P \quad Q \quad R \quad S $

→
Spin only magnetic moment of $\left[ MnBr _{6}\right]^{4-}$ is $.....\,B.M.$ (round off to the closest integer)
→
Aqueous solutions of hydrogen sulphide and sulphur dioxide when mixed together, yield
→