Chemistry MCQs for NEET — Practice Questions with Answers

What is the value of E cell and equilibrium constant respectively for the reaction at $ 25 ^\circ C Fe_{(s)} + 2Ag ^ +_{(aq, 0.5 M)} \rightleftharpoons Fe^{2+} _{(aq, 0.1 M)} + 2Ag_{(s)} $ ?

Which reaction would takes place spontaneously in forward direction at $ 25 ^\circ C if standard oxidation potenitials of Pt | I_{2(s)}| I ^ −, Cu | Cu^{2+}, Cr | Cr^{3+}, Zn | Zn^{2+}, Sn | Sn^{2+}, Pb | Pb^{2+}, Ag | Ag^ +, Fe | Fe^ {2+} $ are 0.54 V., − 0.34 V., 0.74 V., 0.76 V., 0.14 V., 0.13 V., −0.80 V., 0.77 V. respectively.

How many gram of Ag will be obtained if 5.0 F quantity of electricity is passed through aqueous solution of $ AgNO_3$ ?

If 15 Faraday quantity of electricity is passed through $ Al^{3+}_{(l)} $ solution then how many gram of Al metal will be obtained ? ( cell efficiency is 80 % .) ($ At.wt Al = 27 gm mol^{-1} $ )

If 10 Faraday quantity of electricity is passed through molten NaCl during electrolysis 84 L of Cl2 gas is obtained at STP then what is the efficiency of the cell?

During electrolysis oif acqueous solution of NaCl with inert electrodes then at cathode instead of $ Na^+ reduction of H_2O $ takes place because .....................

Select correct option for the given statements (where T = true anf F= false ) (i) if electrolysis of aqueous solution of $ CuSO_4$ is done with inert electrodes then blue colour of solution become faint. (ii) if electrolysis of aqueous solution of $ CuSO_4$ is done with inert electrodes then pH of the solution increases (iii) if electrolysis of aqueous solution of $ CuSO_4$ is done with active electrodes of Cu then weight of anode decreases (iv)if electrolysis of aqueous solution of $ CuSO_4$ is done with active electrodes of Cu then precious metals release from cathode.

Select correct option for the given statements (where T = true anf F= false ) i) if electrolysis of dilute aqueous solution of NaCl is done with inert electrodes then pH of the solution increases. ii) if electrolysis of concentrated aqueous solution of NaCl is done with inert electrodes then at anode chloricne gas is obtained. iii) if electrolysis of dilute aqueous solution of NaCl is done with inert electrodes at cathode hydrogen gas is obtain. iv) if electrolysis of concentrated aqueous solution of NaCl is done with inert electrodes then on adding phenolphthalien to the solution becomes pink.

Select correct option for the given statements (where T = true anf F= false ) i) electrolysis of dilute aqueous solution of NaCl is done with inert electrodes then pH of the solution if increases. ii) if electrolysis of dilute aqueous solution of NaCl is done with inert electrodes then on adding methyl orange to the solution it becomes orange coloured. iii) if electrolysis of concentrated aqueous solution of NaCl is done with inert electrodes pOH of the solution increases. iv) if electrolysis of concentrated aqueous solution of NaCl is done with inert electrodes then the solution obtained turns red litmus to blue

If at $ 50 ^\circ C temperature value of E^0_{ox} is + 0.83 V for the half cell Pt ∣ H_{2(g, 1.0, bar)} | OH ^- _{(aq)} then what is the value of ionic product of water at 50 ^ \circ C $ ?