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Recent questions and answers in Redox Reactions

Questions >> JEEMAIN and NEET >> Chemistry >> Redox Reactions

Self reduction is possible in which of following :

answered Oct 4, 2018 by meena.p

1 answer

can we calculate formal charge of an atom (which is present in a compound)?

answered May 8, 2015 by sharmaaparna1

1 answer

why is formal charge imp?

answered May 6, 2015 by sharmaaparna1

1 answer

For the following disproportion reaction $3Br_2+6OH^{-}\rightarrow 5Br^-+BrO_3^-+3H_2O$. Correct statement below is (Given $Br_2$ molecular mass is 160)

answered Feb 14, 2014 by sreemathi.v

1 answer

The EMF of cell $Ag,AgCl$ in 0.1M $KCl\parallel sat\;NH_4NO_3\parallel 0.1M\;AgNO_3,Ag$ is $0.45\;volt$ at $25^oC$.Calculate solubility product & solubility of $AgCl(0.1M\; KCl$ is $85\% $dissociated & $0.1M$ $AgNO_3$ is $82\%$ dissociated)

answered Dec 12, 2013 by sreemathi.v

1 answer

At $25^oC$ the specific conductance of a saturated solution of $AgCl$ is $2.68\times 10^{-4}Sm^{-1}$ and that of water with which the solution was made is $0.86\times 10^{-4}Sm^{-1}$.If molar conductances at infinite dilution of $AgNO_3,HNO_3$ and $HCl$ are respectively,$1.33$$\times 10^{-4},421\times 10^{-4}$ and $426\times10^{-4}Sm^2mol^{-1}$,calculate solubility of $AgCl$in grams per $dm^3$ in water at given temperature

answered Dec 12, 2013 by sreemathi.v

1 answer

$AgNO_3(aq)\;\overset{\overset{electrolysis}{\Large\rightarrow}}{in\;presence\;of\;Ag\;electrode}$ then wrong statement is

answered Dec 12, 2013 by sreemathi.v

1 answer

$AgNO_3(aq)\;\overset{\overset{electrolysis}{\Large\rightarrow}}{in\;presence\;of\;pt\;electrode}$ then at end of electrolysis

answered Dec 12, 2013 by sreemathi.v

1 answer

Which of following is correct statement?

answered Dec 12, 2013 by sreemathi.v

1 answer

Which of following graph is correct?

answered Dec 12, 2013 by sreemathi.v

1 answer

At what $[HNO_3]$ thermodynamic tendency or reduction of $NO_3^-$ into NO and $NO_2$ by $Ag$ is same?

answered Dec 12, 2013 by sreemathi.v

1 answer

$E_{cell}$ for reduction $NO_3^-\rightarrow NO$ by $Ag(s)$?

answered Dec 12, 2013 by sreemathi.v

1 answer

If $X$ is specific resistance of electrolyte solution $Na_7SO_4$ and $y(N)$ is concentration of solution then $\Delta m$ is given by

answered Dec 12, 2013 by sreemathi.v

1 answer

$NaOH$(aq base) was added to an aqueous HCl solution gradually and the conductivity of solution was measured.The plot of conductivity vs volume of NaOH added

answered Dec 12, 2013 by sreemathi.v

1 answer

For strong electrolytes find $\Lambda_m^{\infty}$ of $CH_3COOH$

answered Dec 12, 2013 by sreemathi.v

1 answer

Among the following,the intensive property is (are)

answered Dec 12, 2013 by sreemathi.v

1 answer

Find the time through which an average current 1.93Amp passed to reduce 0.2mol of $MgCl_2$ into Mg .The current efficiency is 60%

answered Dec 11, 2013 by sreemathi.v

1 answer

$Cd(Hg).CdSO_4.\large\frac{8}{3}$$H_2O(s)\parallel CdSO_4(sat)Hg_2SO_4(s)Hg$ and cell reaction is $Cd(Hg)+Hg_2SO_4(s)+\large\frac{8}{3}$$H_2O(l)\rightarrow CdSO_4.\large\frac{8}{3}$$H_2O(s)+2Hg(l)$.EMF of cell is 1.1V at $25^oC$.Then $\Delta H^o$ will be

answered Dec 11, 2013 by sreemathi.v

1 answer

Which of following is a wrong statement?

answered Dec 11, 2013 by sreemathi.v

1 answer

The resistance of 0.01M of solution of an electrolyte was found to be $150\Omega$ at $25^oC$.Calculate equivalent conductance.cell constant =$0.80cm^{-1}$ [For given solution $n$ factor =2]

answered Dec 11, 2013 by sreemathi.v

1 answer

Calculate EMF of cell Pt,$H_2(1\;atm)/CH_3COOH(0.1M)\parallel NH_3(aq)(0.01N)/H_2\;atm$.Given :$K_a(CH_3COOH)=1.8\times 10^{-5},K_b(NH_3)=1.8\times 10^{-5}$

answered Dec 11, 2013 by sreemathi.v

1 answer

Self reduction is possible in which of following :

answered Dec 11, 2013 by sreemathi.v

1 answer

Which of the following is wrong statement?

answered Dec 11, 2013 by sreemathi.v

1 answer

Which of the following reactions are not possible ?

answered Dec 11, 2013 by sreemathi.v

1 answer

Arrange $F_2,Cl_2,Br_2,I_2$ in order of increasing SRP

answered Dec 11, 2013 by sreemathi.v

1 answer

$CuSO_4$ solution is not stable in $Zn$ container because of

answered Dec 11, 2013 by sreemathi.v

1 answer

$E_{AgI/Ag/I^-}=$?,$E^o_{Ag^+/Ag}=0.8V,K_{spAg I}=10^{-18}$

answered Dec 11, 2013 by sreemathi.v

1 answer

For hydrogen concentration cell in working condition ,the correct relation is

answered Dec 11, 2013 by sreemathi.v

1 answer

An electrochemical cell is shown below : $Pt, H_2(1\;atm)|HCL(0.1\;M| CH_3COOH(0.1\;M)|H_2(1\;atm)Pt$ The EMF of the cell will not be zero , because :

answered Dec 11, 2013 by sreemathi.v

1 answer

The potential of hydrogen electrode at $25^{\circ} C$ will be:$(PH_2 =1\; atm, concentration\; of\; H^{+} = 0.1M)$

answered Dec 11, 2013 by sreemathi.v

1 answer

$Cu/CuSO_4\parallel AgNO_3/Ag$, Find $K_{eq}$ for the reaction. Given : $E^o_{Cu^{+2}/Cu}=0.34, E^o_{Ag^+/Ag}=0.8, T=298K$

answered Dec 11, 2013 by sreemathi.v

1 answer

For reaction $m^{x+}(aq)+xe^-\rightleftharpoons m(s)$ the nature of graph between $E_{m^{x+}/m}$ vs $\log[m^{x+}]$ is

answered Dec 11, 2013 by sreemathi.v

1 answer

Refer to the below equation :

answered Dec 11, 2013 by sreemathi.v

1 answer

$E^o\large\frac{A^{+3}}{A^+}$$=xV,E^o\large\frac{A^{+3}}{A^{+2}}$$=yV,E\large\frac{A^{+2}}{A^+}=$?

answered Dec 11, 2013 by sreemathi.v

1 answer

Which electrolyte can be used for salt bridge between $Ag^+,Pb^{+2},Hg^{+2},Cu^{+},Te^+$ ions

answered Dec 10, 2013 by sreemathi.v

1 answer

Which of following is false for salt bridge?

answered Dec 10, 2013 by sreemathi.v

1 answer

$E^o_{Zn^{+2}/Zn}=0.76V,E^o_{Cu^{+2}/Cu}=0.34V$ find $\Delta G^orx_n$ of following cell $Zn/Zn^{+2}\parallel Cu^{+2}/Cu$

answered Dec 10, 2013 by sreemathi.v

1 answer

The correct cell reaction for given cell is $Sn/Sn^{+2}\parallel Ag^+/Ag$

answered Dec 10, 2013 by sreemathi.v

1 answer

$E^o_{Zn^{+2}/Zn}=-0.76V$.So $E^o_{Zn/Zn^{+2}}=$?

answered Dec 10, 2013 by sreemathi.v

1 answer

Which of the following relation is correct?

answered Dec 10, 2013 by sreemathi.v

1 answer

What is the direction of current in following galvanic cell?

answered Dec 10, 2013 by sreemathi.v

1 answer

The charge required for oxidation of $\large\frac{3}{2}$ mole of $Sn^{2+}$ to $Sn^{4+}$ is

answered Dec 10, 2013 by sreemathi.v

1 answer

During discharging of lead steerage battery,which of the following is false ?

answered Dec 10, 2013 by sreemathi.v

1 answer

In salt bridge the electrolyte used should be

answered Dec 10, 2013 by sreemathi.v

1 answer

In the calomel half cell,the reduction $rx_n$ is

answered Dec 10, 2013 by sreemathi.v

1 answer

The correct representation of $\lambda^{\large\circ}CH_3COOH$ interms of $\lambda^{\large\circ}_{CH_3COOK},\lambda^{\large\circ}_KCl$ is

answered Dec 10, 2013 by sreemathi.v

1 answer

The dimensions of a conductance cell are 0.15dm & 0.95dm and the electrodes are separated by 0.05dm. What is cell constant for this cell?

answered Dec 10, 2013 by sreemathi.v

1 answer

What is the cell constant of a cell of an electrode having dimensions 4cm & 3cm and the two electrodes are separated by 2cm?

answered Dec 10, 2013 by sreemathi.v

1 answer

Calculate $\wedge^{\large\circ}_m$ for KCl solution if molar ionic conductances at infinite dilution are $7.352\times 10^{-3}Sm^2mol^{-1}$ for $K^+$ and $7.634\times 10^{-3}Sm^2mol^{-1}$ for $Cl^{-}$.The $\wedge^{\large\circ}_m$ is

answered Dec 10, 2013 by sreemathi.v

1 answer

Calculate the stability constant of the complex $[Zn(NH_3)_4]^{2+}$ formed in the $rx_n$:$Zn^{2+}+4NH_3\rightleftharpoons[Zn(NH_3)_4]^{2+}$. The stability constant 'K' is

answered Dec 10, 2013 by sreemathi.v

1 answer

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