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Define gold number....

Define gold number.

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The coagulation of 100 ml of a colloidal solution of gold is completely prevented by addition of 0.25 g of starch to it before adding 10 ml of 10% NaCl solution. Calculate 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?

Explain the following Gold number

Write notes on Gold number

Gold number gives

What is gold number?

What does the reciprocal of gold number represent ?

Fill in the blanks : The term Gold number was introduced by the scientist …………….

SHARAM PUBLICATION-SOLVED PAPER 3-EXERCISE
  1. What is the difference between Schottky defect and Frenkel defect.

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  2. A 4% solution of sucrose (C(12) H(22) O(11)) having mol mass 342 is...

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  3. How is sulphur dioxide prepared from iron pyrites?What happens when...

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  4. What are barbiturates ?To which class of drug they belong?

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  5. How is CH3 CH2 NH2 prepared from CH3 CN

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  6. How is CH3 CH2 NH2 prepared from C2H6 NO2?

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  7. How are ethers prepared by Williamson synthetic method ? What happen ...

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  8. How are ethers prepared by Williamson synthetic method ? What happen ...

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  9. The b.p of ethylacohol is higher than that of dimethyl ether. Why?

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  10. Discuss the general trend in properties of transition elements with r...

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  11. Discuss the general trend in properties of transition elements with r...

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  12. Discuss the general trend in properties of transition elements with r...

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  13. Give a method of preparation of ethyl amine from ethyl bromide.

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  14. Discuss the mechanism of SN 2 reaction.

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  15. What happens when 2- bromobutane is treated with alc. KOH solution.

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  16. What does depression of freezing point mean?How is the molecular mass ...

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  17. The boiling point of benzene is 353.2 K .When 1.8 g of a non - volatil...

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  18. What are emulsions? What are their different types? Give one example o...

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  19. What are lyophilic and lyophobic colloids ? Give one example of each.

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  20. Define gold number.

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