Chemistry Question Bank

Which of the following interrelation with our surroundings are included in environmental studies?

Galvanic cell is a device in which

What is the cell reaction occurring in Daniell cell (Galvanic cell)? (a) Cu s ZnSO aq CuSO aq Zn s -> (b) Zn s CuSO aq Cu s ZnSO -> (c) Ni s ZnSO aq NiSO s Zn s -> (d) 2Na s CdSO aq Na SO aq…

Which cell converts electrical energy into chemical energy?

The reduction potential at 25oC for Fe3+|Fe2+ electrode is +0.718 V. If , the ratio of molar concentrations of Fe2+ to Fe3+ ions in solution is (2.303RT/F = 0.06, log 5 = 0.7)

For the process: Cu2+ + 2e– → Cu; log[Cu2+] vs. Ered graph is shown in the figure, where OA = 0.34 V. The electrode potential of the half-cell of Cu|Cu2+ (0.1 M) will be [2.303 RT/F = 0.06]

Which graph correctly correlates Ecell as a function of concentrations for the cell Zn(s) + 2Ag+(aq) Zn2+(aq) + 2Ag(s), E°cell = 1.56 V Y-axis : Ecell, X-axis : log10 (a) (b) (c) (d)

The e.m.f. of a Daniell cell at 298K is When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. changed to E2. What is the relationship between E1 and E2?

On the basis of information available from the reaction 4Al + 3O2 →2Al2O3; ∆G = – 965 kJ/mol of O2.The minimum EMF required to carry out electrolysis of Al2O3 is

A 1.0 M with respect to each of the metal halide AX3, BX2 CX3 and DX2 is electrolysed using platinum electrodes. If The correct sequence in which the various metals are deposited at the cathode is

Assertion: Zinc can be used while copper cannot be used in the recovery of Ag from the complex [Ag(CN)2]– Reason: Zinc is powerful reducing agent than copper.

Cr O 14H 6e 2Cr 7H O; -> E 1.33V. At [Cr O ]l 4.5 millimoles, [Cr3+] = 15 millimoles, E is 1.067 V. The pH of the solution is nearly equal to [KCET 2016]

Standard electrode potential for Sn4+/Sn2+ couple is +0.15 V and that for the Cr3+/Cr couple is –0.74V. These two couples in their standard state are connected to make a cell. The cell potential will be: [AIPMT 2011]

For the reduction of silver ions with copper metal, the standard cell potential was found to be +0.46 V at 25ºC. The value of standard Gibbs energy, ∆Gº will be (F = 96500 C mol–1) [CBSE AIPMT 2010]

How many coulombs are required to deposit 50 g of aluminium when the electrode reaction is Al 3e Al -> [RPMT 2010]

The equivalent conductance of M / 32 solution of a weak monobasic acid is 8.0 mho cm2 eq–1and at infinite dilution is 400 mho cm2 eq–1. The dissociation constant of this acid is [CBSE AIPMT 2010]

Two students use same stock solution of ZnSO4 but different solutions of CuSO4. The EMF of one cell is 0.03 V higher than the other. The concentration of CuSO4 in the cell with higher EMF value is 0.5 M. The concentra…

The conductivity of 0.20 M KCl solution at 298 K is 0.0248 S cm–1. What will be molar conductivity? [Haryana PMT 2010] (a)124 S cm2 (b)124 S cm–1 (c)124 S ohm–1 cm2 equiv–1 (d)124 S cm2 mol–1

When iron is rusted, it is [MP PMT 2010]

At 18º C, the conductance of H+ and CH3COO– at infinite dilution are 315 and 35 mho cn2 eq–1 respectively. The equivalent conductivity of CH3 COOH at infinite dilution is…..mho cm2 eq–1 [CBSE AIPMT 2010]

Assertion (A) On dilution, the equivalent as well as molar conductivity of solution increases. Reason (R) With dilution, the number of current carrying particles per cm3 increases. [AIIMS 2010]

Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al2(SO4)3, Given that o Al and o SO are the equivalent conductance at infinite dilution of the respective …

Standard electrode potential of cell is (EºAg+/Ag = 0.80V)

If the salt bridge is removed suddenly from a working cell, the voltage

Which one of the following is not a function of a salt bridge?