Advertisements
Advertisements
Question
- Write the formula and draw electron dot structure of carbon tetrachloride.
- What is saponification? Write the reaction involved in this process.
Advertisements
Solution
- The formula for carbon tetrachloride is CCl4.
- When an ester is treated with an alkali, it gives alcohol and sodium ethanoate (sodium salt of carboxylic acid).
\[\ce{CH3COOC2H5 \overset{NaOH}{->}C2H5OH + CH3COONa}\]
This reaction is known as saponification because it is used in the preparation of soap.
APPEARS IN
RELATED QUESTIONS
Which of the following sets of materials can be used for conducting a saponification reaction for the preparation of soap?
(a) Ca(OH)2 and neem oil
(b) NaOH and neem oil
(c) NaOH and mineral oil
(d) Ca(OH)2 and mineral oil
Hard water is not available for an experiment. Some salts are given below :
(I) Sodium chloride
(II) Sodium sulphate
(III) Calcium chloride
(IV) Calcium sulphate
(V) Potassium chloride
(VI) Magnesium sulphate
Select from the following group of these salts, each member of which may be dissolved in water to make it hard.
(A) I, II, V
(B) I, III, V
(C) III, IV, VI
(D) II, IV, VI
Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?
A student took four test tubes P, Q, R and S and filled about 8 mL of distilled water in each. After that he dissolved an equal amount of Na2SO4 in P, K2SO4 in Q, CaSO4 in R and MgSO4 in S. On adding an equal amount of soap solution and shaking each test tube well, a good amount of lather will be obtained in the test tubes:
(a) P and Q
(b) P and R
(c) P, Q and S
(d) Q, R and S
Explain esterification reaction with the help of a chemical equation. Describe an activity to show esterification.
Give reasons for the following observation:
Use of synthetic detergents causes pollution of water.
Why is common salt (sodium chloride) added during the preparation of soap?
Give any two differences between soaps and detergents.
What is a soap?
Give the reason of formation of scum when soaps are used with hard water.
Consider the following oils :
(I) Mobil oil
(II) Castor oil
(III) Turpentine oil
(IV) Kerosene
(V) Mustard oil
(VI) Coconut oil
Which of these can be used for prepartion of soap?
(a) I, II, III, VI
(b) II, V, VI
(c) II, III, V, VI
(d) II, III, VI
The chemical mostly used in the preparation of most of the soaps we use is
(a) Sodium chloride
(b) Potassium hydroxide
(c) Sodium hydroxide
(a) Potassium chloride
Answer the following question.
In three test tubes A, B, and C, three different liquids namely, distilled water, underground water and distilled water in which a pinch of calcium sulphate is dissolved, respectively are taken. Equal amount of soap Answer is added to each test tube and the contents are shaken. In which test tube will the length of the foam (lather) be longest? Justify your answer.
How will you check with the help of soap powder whether water is hard?
Name three chemicals responsible for the surface activity of various detergents.
The saponification of a fat or oil is done using _____ solution for hot process.
Water, coconut oil, and _______ are necessary for soap preparation.
How does soap clean clothes?
______ are substances which can undergo chemical changes to produce certain materials.
What are the similarities between Soap and synthetic detergent.
