Chemistry MCQs for NEET — Practice Questions with Answers

What quantity of electricity is required for complerte reduction of all $ Ag ^+ from 1.0 M AgNO_3 $ is 250 ml aqueous solution ?

Using 2 g Hg cathode Cd-Hg amalgam is obtained by electrolysis of $ CdCl_2$ then how much ampere electric current should be passed for 100 seconds to obtain Cd-Hg having 20% Cd ? (At.wt Cd = 112.5 g mol-1 )

On passing 5 amp current for 2.15 hours through unknown solution of the salt of the Pd metal theoritically 10.64 g of Pd metal get deposited then what is the oxidation state of the Pd in that salt ( $ At.wt Pd = 106.4 g mol ^ {-1} $ )

If electrochemical equivalent of the metal is $ 4.0 \times 10 ^ {-4} g /coulomb $ then how much metal will be deposited at cathode on passing 15 amp current for 2 hours where current efficiency is 75 %

Theoritically how much quantity of electricity is required to obtained 112 ml of hydrogen gas at STP by electrolysis of acidic water ?

For how much times 0.5 A current should be passes through aqueous solution of CuSO_4 to deposit 2 g of Cu by electrolysis ? $ ( At.wt Cu = 63. 5 g mol ^ {-1}$ )

When aqueous solution of $ AgNO_3 $ is electrolysed with platinum electrodes its concentration decreases from 4M to 3 M. if same solution is electrolysed with Ag electrode then which of the following observation will be observed ?

If 0.5L 2.0 M aqueous solution of $ Ni(NO_3)_2 $ is electrolysed between graphite anode and nickel cathode by passing 9.65 A current for 3 hours then what will be the concentration of $ Ni(NO_3)_2 $ solution?

If 4 L 0.8 M aqueous solution of AgNo_3 is electrolysed between inert electrodes by passing 5A current for 10 hours then what will be the decrease in the concentration of $ Ag ^ + _{(aq)} $ in the solution? ( efficiency of current 80 % )

To produce 100 ml $ O_2 gas per minute at 25 ^ \circ C $ temperature and 1 bar pressure by electrolysis of water how much electric currenty should be passsed through the water ? Efficiency of current is 90% .