Explain why sometimes foaming is seen in river water near the place where sewage water is poured after treatment?
Detergents (which are not biodegradable) persist in water even after sewage treatment and that causes foaming in river water.
Compounds with antiseptic properties are
(a) CHCl, (b) CHI3
(c) Boric acid (d) 0.3 ppm aqueous solution of Cl2
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.
With the help of an example explain how do tranquilizers control the feeling of depression?
Sodium salts of some acids are Very useful as food preservatives. Suggest a few such acids.
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
Which of the following compounds are administered as ant-acids?
(a) Sodium carbonate (b)Sodium Hydrogen carbonate
(c)Aluminium carbonate (d)Magnism Hydroxide
How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?
What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?
Aspirin is pain relieving antipyretic drug but can be used to prevent heart attack. Explain.
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.
Name two ct-amino acids which form a dipeptide which is 100 times more sweet than cane sugar?
Match the class of compounds given in Column I with their functions given in Column II.
Assertion (A): Receptors are crucial to body's communication process. Reason (R): Receptors are proteins.
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.
Low level of noradrenaline is the cause of depression. What type of drugs are needed to cure this problem? Name two drugs.
Which of the following are sulpha drugs?
(a) Sulphapyridine (b) Prontosil
(c) Salvarsan (d) Nardil
Assertion (A): Competitive inhibitors compete with natural substrate for their attachment on the active sites of enzymes.
Reason (R): In competitive inhibition, inhibitor binds to the allosteric site of the enzyme.
Assertion (A): All chemicals added to food items are called food preservatives.
Reason (R): All these chemicals increase the nutritive value of the food.
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.
What are enzyme inhibitors? Classify them on the basis of their mode of attachments on the active site of enzymes. With the help of diagrams explain how do inhibitors inhibit the enzymatic activity.
Ckemistnj in Evenjdai] Life 325
Which of the following statements are incorrect about receptor proteins?
(a) Majority of receptor proteins are embedded in the cell membranes.
(b) The active site of receptor proteins opens on the inside region of the cell.
(c) Chemical messengers are received at the binding sites of receptor proteins.
(d) Shape of receptor does not change during attachment of messenger.
What is the advantage of using antihistamines over antacids in the treatment of acidity?