Chemistry MCQs for NEET — Practice Questions with Answers

If for the reaction taking place in one electrochemical cell $ Kc = 1.3141 \times 10^{107} M^{– 1} $ and n = 2 then for that cell value of E ^\circ $ Cell is _.

If for the reaction taking place in an electrochemical cell $ c = 1.3141 \times 10^{307} $ and n = 6. if standard reduction potential of the cathode is 1.36 V then what is the standard oxidation potential of the anode?

What is the pH of the solution of HCl if cell potentila of the cell $ Pt | H_{2(g. 1.0 bar)}| HCl_{(xM)} || Au ^{3+}_{(0.001M)} | Au is 1.6655 V ? (E^0_{Au^{3+}|Au} = 1.4 V.) $

Mention the value of n for the reaction taking place in the cell if its cell potential is 3.16V and equilibrium constant is $ 1.727 \times 10^{214}M ^{-2} at 25 ^ \circ C $ temperature.

If for the cell $ Mg | Mg^{2+}_{(0.2M)} || H^+_{(xM)}∣ H_{2(g,1.0 bar )}|Pt $ values of E and $ E^0_{cell} are 2.3629 V.(0.2 M)(X M)Cell and 2.36 V. respectively at 25 ^\circ C $ temperature then value of x is _.

If standard potential of the reaction $ 2H_2O_(l) \rightleftharpoons O_{2(g,1 bar )} + 4H^+_{aq} + 4e^− is -1.23V and [H+] = 10^{-7} at 25 ^\circ C $ temperature then what is the value of potential for the reaction? OR What is the oxidation potential of the pure water?

If for the reaction $ 2H_2O_(l) + 2 e ^ - \rightleftharpoons H_{2 (g, 1 bar)} + 2 OH ^ - _{aq, 10 ^ {-7} M } E = -0.417 V at 25 ^ \circ C $ temperature what is the value of E 0 for the reaction? OR what is the standard reduction potential of the pure water at $ 25 ^\circ C $ if potential is – 0.417 V.

If $ Co | Co^{3+}, Co^{2+}| Co ^{3+}, Fe | Fe ^ {3+}, Fe^{2+}| Fe^{3+} std. oxidation potential are − 0.4167 V., − 1.81 V., 0.0367 V., − 0.77 V. respectively then what is the std. potential of the cell Fe | Fe^{2+} || Co^{2+} Co $ ?

If cell potentisl of the cell $ Pt | H_{2(g,1.0 bar ) | HCl_{(X M)}â•‘ Cu ^{2+} _{(0.01)} | Cu 0.635 V. at 25 ^\circ C then what is the pH of the HCl solution? (E ^\circ Cu ^{2+}|Cu = 0.34 V.) $

If cell potentisl of the cell $ Mg | Mg^{2+}_{(0.01M)} â•‘ HCl_{(X M)} | H_{2(g,1.0 bar)}| Pt 2 .09V. at 25 ^\circ C then what is the pH of the HCl solution? (E ^0 _{Mg ^{2+}|Mg }= - 2.36 V )$