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Nanomaterials - Applications and Drawbacks

0.25 g lyophi...

Question

0.25 g lyophilic colloid is added to 100 ml gold solution to prevent the coagulation from adding 1 ml 10% NaCl solution. What will be a gold number of lyophilic colloids?

A

25

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B

125

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C

250

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D

0.25

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Solution

The correct option is A
25

The correct answer is option A.
Explanation for the correct answer:
Step: 1: Given.
$0.25 g$ lyophilic colloid is added to $100 m l$ the gold solution.
$\Rightarrow 250 m g$ of lyophilic colloid is added to $100 m l$ the gold solution.
Step: 2: Calculation of the gold number.
If Lyophilic colloid added to $1 m l$ gold solution is $\frac{250}{100}$ , then Lyophilic colloid added to $10 m l$ the gold solution will be $\frac{250}{10} = 25$
Therefore, the gold number of lyophilic colloids is $25$ .
Hence, the correct answer is 25.

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