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The answer to each of the following questions is a single digit integer ranging from 0 to 9. It the correct answers to the questions numbers A, B, C and S (say ) are 4, 0,9 and 2 respectively thent the correct darkening of bubbles should be us shown on the side :
Total number of elements present in the 2nd short period is

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Knowledge Check

  • The answer to each of the following question is a single digit integer, ranging from 0 to 9. if the correct answers to the question number A,B,C and D (say ) are 4,0,9 and 2 respectively. Then the correct correct darkening of bubbles should be as shown on the side.

    A
    In Mg-Al cell, the number of electrons involved in the cell reaction i s
    B
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    C
    Three litres of 0.5M `K_(2)Cr_(2)O_(7)` solution have to be completely reduced in the acidic medium. The number of faradays of electricity required will be
    D
    For the Mg-Ag cell, how many times the difference between the EMF of the cell and its standard EMF will change if concentration of `Mg^(2+)` ions changed to 0.1M and that of `Ag^(+)` ions is changed from 0.5M to 0.25M.

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