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In the preparation of soap, a small amou...

In the preparation of soap, a small amount of sodium chloride is added to the mixture of fat and sodium hydroxide. The role of common salt is to

A

favour the percipitation of soap

B

enhance the cleansing capacity of soap

C

increase the weight of the soap to earn money

D

decrease the acidity of the soap

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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 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 0.025 g of starch the coagultion is just prevented . the gold number of starch is : 0.025, 0.25, 2.5, 25.

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. which of the following statement (S) is / are correct? higher the gold number, more protective power of colloid, Lower the gold number, more protective power, Higher the coagulation value, more the coagulation power, lower the coagulation value, higher the coagulation power.

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 mili - gram of the protective colloid which prevent the coagulation of 10 mL of 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. gold number given an indication of : protective nature of colloids, purity of gold in suspension, the charge on a colloidal solution of gold, gram of gold per litre of solution.

Which separation techniques will you apply for the separation of the following? Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.

MODERN PUBLICATION-CARBON AND ITS COMPOUNDS-EXERCISE
  1. Which one of the following are the correct observatons about acetic ac...

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  2. Hard water required for an experiment is not available in a schol labo...

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  3. In the preparation of soap, a small amount of sodium chloride is added...

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  4. Select the observation about dilute solution of acetic acid.

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  5. When yo add about 2 mL of acetic acid to a test tube contianing an equ...

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  6. While studying saponification reaction for the preparatoin of soap, th...

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  7. In and experiment to study the properties of ethanoic acid, a student ...

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  8. A student takes about 2 mL ethanoic acid in a dry test tube and adds a...

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  9. In order to study saponification reaction we first prepare 20% solutio...

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  10. A student prepared 20% sodium hydroxide solution in a beaker to studey...

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  11. Hard water is not available for an experiment. Some salts are given be...

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  12. What do we observe on pouring acetic acid on red and blue litmus paper...

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  13. A student takes about 4 mL of distilled water in four test tubes marke...

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  14. In the neighbourhood of your school, hard water required for an experi...

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  15. A student puts a drop of reaction mixture of a saponification reaction...

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  16. For preparing soap in the laboratory we requires an oil and a base. Wh...

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  17. How will you test in the laboratory, whether the given sample of water...

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  18. When a compound X in its aqueous from is added to acetic acid taken in...

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  19. Can we test hard water by using a detergent? Write one more method oth...

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  20. When boilers of water are used for a very long time. Then write layers...

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