12 Class Chapter 16 – Chemistry In Everyday Life

Chemistry In Everyday Life Class 12

These are notes from chapter Chemistry in Everyday Life Class 12.

Antagonists

                    Drugs that binds to the receptor site and inhibits its natural function is known as antagonists.

Agonists

               Drugs that mimic the natural messenger by switching on the receptor is called as agonists.

The drugs which bind the receptors and disturb their functions such drugs are called antagonists. The drugs which activate the receptors are called agonists.

Antacids

               Its example is Metal Hydroxide.

Antihistamine

                        Its example is Terfinadine, Cimetidine. Histamine stimulates the secretion of pepsin and HCl in stomach.

Neurological Active Drugs

Tranquilizers

                       Chemical compound used for the treatment of stress or severe mental diseases. These relive anxiety, stress, irritability, depression, tension by inducing a sense of well being. Examples- Iproniazid,  Equanil, Barbiturates are hypnotic that is sleep producing agents.

Analgesic

                 These drugs reduce or abolish pain without causing mental confusion, paralysis and some other disturbances. Example- Asprin, Analgin, Paracitamol.

Narcotics Analgesics are Morphine, Heroine.

Antibiotics

                   These drugs inhibit the growth of microorganisms or kill the microorganisms. Example- Penicillin, Tetracycline, Imipenam, Meropenam, Ampicillin, Chloramphinicol.

Antiseptic

                  Furacine, Soframycine, Dettol (Chloroxylenol + Terpinol), Bithional.

Disinfectant

                     Apply to lifeless objects. Chlorine(0.2 to 0.4 ppm), SO2 in low concentration. 

NOTE: “0.2% solution of phenol is antiseptic while its 1% solution is disinfectant.”

Antifertility Drugs

                                Drug used to control population. Example- Norethindrone, Novestrol.

Food Preservative

                                Prevent spoilage of food due to microbial growth. Example- Sodium Benzoate, table salt.

Gold Number
                      It is the calculation of the weight of the protective colloid in milligram to be added to 10 ml of gold solution to prevent its coagulation when 1 ml of 10% of NaCl solution is added to it rapidly.

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