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On addition of 1 mL solution of 10% NaCl...

On addition of `1 mL` solution of `10% NaCl` to `10 mL` gold sol in the presence of `0.0250 g` of starch, the coagulation is just prevented. What is the gold number of starch?

Text Solution

Verified by Experts

The correct Answer is:
`25`
Gold number is minimum amount of protective colloid which can protect 10 mL standard gold sol from coagulation when 1 mL of `10% NaCl` is added.
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On addition of one ml solution 10% NaCl to 10 ml gold sol in the presence of 0.0250g of starch , the coagulation is just prevented starch has the gold number :

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Knowledge Check

  • On addition of 1 ml solution of 10% NaCl to 10 mL gold sol in the presence of 0.025 g of starch, the coagulation is just prevented. Starch has the gold number

    A
    0.025
    B
    0.25
    C
    0.5
    D
    25

  • On addition of one mL solution of 10% NaCl to 10 mL gold sol in the presence fo 0.0250 g of starch, the coagulation is just prevented. Starch has the following gold number

    A
    `0.025`
    B
    `0.25`
    C
    `2.5`
    D
    `25.`

  • The protective power of the lyophilic colloids is expressed in terms of gold number a term introduced by Zsigmondy Gold number is the number of milligram of the protective colloid which prevent the coagulation of 10 ml of red gold sol, when 1 ml of a 10 percent solution of sodium chloride is added to it. Thus, smaller the gold number of lyophilic colloid, the greater is the protective power. On addition of one mL of solution of 10% NaCl to 10 mL of red gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is

    A
    0.25
    B
    0.25
    C
    2.5
    D
    25

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    on addition of 1 ml solution of 10% NaCl to 10 ml gold sol in the presence of 0.25g of strach, the coagulation is just prevented. Strach has the following gold number

    the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. On addition of one mL of sloution of 10 % NaCl to 10 mL. of red gold sol in presence of 0l.025 g of starch the coagultion is just prevented . the gold number of starch is

    On addition of one mL of 10% NaCl solution to 10 mL gold sol in the presence of 0.25 g of starch, the coagulation is just prevented. Starch has the gold number

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    On addition of 1 ml of solution of 10% NaCl to 100ml corporate gold sol in presence of 0.25g of starch, the coagulation is just prevented. The gold number of starch is

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