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The answer to each of the following ques...

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 numbers A, B, C and D (say) are 4, 0, 9 and 2 respectively, then the correct darkening of bubbles should be as shown on the side:

`The number of metalloids present in the following elements is tin, lead, arsenic, palladium, anitmony, tungsten, bismuth, osmium, lanthanum

Text Solution

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The correct Answer is:
3
Arsenic, antinony and bismuth are metalloids.
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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
    0.25 mole of propane is subjected to combustion. If this reaction is used for making a fuel, cell the number of moles of electrons involved in each half cell for this amount of propane will be
    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.