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Atul Rao Prabhu
Asked: 2022-11-07T18:07:39+05:30 In:

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

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?
A. 25
B. `2.5`
C. `0.25`
D. `0.025`
Parabola
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1 Answer

  1. Correct Answer – A
    Gold number of lyophillic sol added in Mg in 10 ml gold sol with 1 ml of 10% NaCl to prevent cagulation.
    `=0.025 g`
    `0.025xx1000=25 Mg`

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Darpan Rao Joshi
Asked: 2022-11-04T17:55:08+05:30 In:

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?

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?
Parabola
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1 Answer

  1. Amount of starch required `= 0.025 gm`
    `= 0.025 xx 10^(3) mg`
    `= 25 mg`
    Gold Number `= 25.`

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