Answer
Verified
372k+ views
Hint:Soaps are only soft water and on the other hand, detergents are soluble in both hard and soft water. Hard water contains salts or ions like calcium and magnesium in them and soft water is devoid of such ions.
Complete answer:
Soaps used for cleaning purposes are sodium or potassium salts of long chain fatty acids like stearic acid, oleic acid and palmitic acid. Soaps containing sodium salts are formed by heating fat or glycerol ester of fatty acid with aqueous sodium hydroxide solution. This reaction is known as saponification. Soaps are biodegradable. On the other hand, detergents are non biodegradable. Detergents are sodium or ammonium salt of higher sulphonic acid. Cleaning action of detergents is much more efficient and effective than that of soap. Soaps do not work in hard water but detergents can be used in both hard and soft water as well. This is because hard water contains calcium and magnesium ions. These ions form insoluble calcium and magnesium soaps respectively when sodium or potassium soaps are dissolved in hard water.
For example: \[2{{\text{C}}_{17}}{{\text{H}}_{35}}{\text{COONa}} + {\text{CaC}}{{\text{l}}_2} \to 2{\text{NaCl}} + {\left( {{{\text{C}}_{17}}{{\text{H}}_{35}}{\text{COO}}} \right)_2}{\text{Ca}}\] where \[{\left( {{{\text{C}}_{17}}{{\text{H}}_{35}}{\text{COO}}} \right)_2}{\text{Ca}}\] is insoluble calcium stearate. These insoluble soaps separate as scum in water and are useless as cleansing agents, in fact, these are a hindrance to good washing, mass. Hair washed with hard water looks dull because of this sticky precipitate. Dyes does not absorb evenly on cloth washed with soap using hard water, because of this gummy mass.
Thus, the correct option is B.
Note:
Detergents are similar to soaps but are more soluble in water, because the polar sulphonate of detergents is less likely than the polar carboxyl of soap to bind to calcium and other ions like magnesium found in hard water.
Complete answer:
Soaps used for cleaning purposes are sodium or potassium salts of long chain fatty acids like stearic acid, oleic acid and palmitic acid. Soaps containing sodium salts are formed by heating fat or glycerol ester of fatty acid with aqueous sodium hydroxide solution. This reaction is known as saponification. Soaps are biodegradable. On the other hand, detergents are non biodegradable. Detergents are sodium or ammonium salt of higher sulphonic acid. Cleaning action of detergents is much more efficient and effective than that of soap. Soaps do not work in hard water but detergents can be used in both hard and soft water as well. This is because hard water contains calcium and magnesium ions. These ions form insoluble calcium and magnesium soaps respectively when sodium or potassium soaps are dissolved in hard water.
For example: \[2{{\text{C}}_{17}}{{\text{H}}_{35}}{\text{COONa}} + {\text{CaC}}{{\text{l}}_2} \to 2{\text{NaCl}} + {\left( {{{\text{C}}_{17}}{{\text{H}}_{35}}{\text{COO}}} \right)_2}{\text{Ca}}\] where \[{\left( {{{\text{C}}_{17}}{{\text{H}}_{35}}{\text{COO}}} \right)_2}{\text{Ca}}\] is insoluble calcium stearate. These insoluble soaps separate as scum in water and are useless as cleansing agents, in fact, these are a hindrance to good washing, mass. Hair washed with hard water looks dull because of this sticky precipitate. Dyes does not absorb evenly on cloth washed with soap using hard water, because of this gummy mass.
Thus, the correct option is B.
Note:
Detergents are similar to soaps but are more soluble in water, because the polar sulphonate of detergents is less likely than the polar carboxyl of soap to bind to calcium and other ions like magnesium found in hard water.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Select the word that is correctly spelled a Twelveth class 10 english CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What organs are located on the left side of your body class 11 biology CBSE
What is BLO What is the full form of BLO class 8 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE