How are transparent soaps manufactured?
Transparent soaps are prepared by dissolving the soap in ethanol and then evaporating the excess solvent.
Compounds with antiseptic properties are
(a) CHCl, (b) CHI3
(c) Boric acid (d) 0.3 ppm aqueous solution of Cl2
Sodium salts of some acids are Very useful as food preservatives. Suggest a few such acids.
With the help of an example explain how do tranquilizers control the feeling of depression?
Assertion (A): Chemical messengers are chemicals that enable communi ¬cation of message between two neutrons or between neurons and muscles. Reason (R): Chemicals enter the cell through receptor.
Write the chemical equation for preparing sodium soap from glyceryl oleate and glyceryl palmitate. Structures of these compounds are given below:
(i)(C15H31COO)3C3H5-Glyceryl palmitate
(ii)(C17H32COO)3C3H5-Glyceryl oleate
What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?
Which of the following are anionic detergents?
(a) Sodium salts of sulphonated long chain alcohol.
(b) Ester of stearic acid and polyethylene glycol.
(c) Quaternary ammonium salt of amine with acetate ion.
(d) Sodium salts of sulphonated long chain hydrocarbons.
How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?
Aspirin is pain relieving antipyretic drug but can be used to prevent heart attack. Explain.
Assertion (A): Sulpha drug contain sulphonamide group.
Reason (R): Salvarsan is a sulpha drug.
Which of the following compounds are administered as ant-acids?
(a) Sodium carbonate (b)Sodium Hydrogen carbonate
(c)Aluminium carbonate (d)Magnism Hydroxide
Match the class of compounds given in Column I with their functions given in Column II.
Assertion (A): Sodium chloride is added to precipitate soap after saponification.
Reason (R): Hydrolysis of esters of long chain fatty acids by alkali produces soap in colloidal form.
Assertion (A): Receptor proteins show selectivity for one chemical messenger over the other.
Reason (R): Chemical messenger binds to the receptor site and inhibits its natural function.
Assertion (A): Artificial sweeteners are added to the food to control the intake of calories.
Reason (R): Most of the artificial sweeteners are inert and do not metabolise in the body.
Explain the following terms with suitable examples:
(i) cationic detergents (ii) anionic detergents and (iii) non-ionic detergents
Explain why sometimes foaming is seen in river water near the place where sewage water is poured after treatment?
Synthetic detergents have advantage over usual soaps as far as cleansing power is concerned. But use of synthetic detergents over a long time creates environmental pollution. How can the pollution caused by synthetic detergents be minimized? Classify the detergents according to their chemical nature.
Which of the following are sulpha drugs?
(a) Sulphapyridine (b) Prontosil
(c) Salvarsan (d) Nardil
If soap has high alkali content it’irritates skin. How can the amount of excess alkali be determined? What can be the source of excess alkali?
Name two ct-amino acids which form a dipeptide which is 100 times more sweet than cane sugar?
