kvmabsolute.blogg.se - A lesson in chemistry

Alexander Fleming.Ģ.This season's Warriors couldn't measure up to the 2022 NBA championship team for a variety of reasons.ĭuring his exit interview with the media Saturday, Golden State veteran center Kevon Looney pinpointed a major difference between the two squads: Building chemistry at the season's start. The World’s first antibiotic penicillin was discovered by The world’s first antibiotic penicillin was discovered by Dr.Ex: Chloramphenicols, tetracyclines, Penicillin derivatives, cephalosporin’s and their derivatives.

These substances were called as antibiotics.

The biosynthesized chemicals isolated from the plants/micro organisms and used as medicines against infectious diseases.

Many micro organisms and plants synthesize chemicals which are toxic in nature to protect them from invading organisms.

Explain briefly about antibiotic and analgesic? If 4.5kg of fuel is completely burnt and amount of heat produced stands measured at 1, 80,000 KJ what is the calorific value. The minimum temperature at which a substance catches fire and burns is called its ignition temperature.Ĥ. It can be applied on the live tissues,įor example. Why do antiseptics differ from disinfectants? Give one example of each. it may not cure the disease but actually can have harmful side to the bodyĢ. One should not take medicines without consulting doctors because if a wrong medicine is accidently eaten for a disease.

Why should not medicines be taken without consulting doctors? What are the essential requirements for producing fire?ġ. How many types of combustion are there?ħ. Name the unit in which the calorific value of a fuel is expressed?Ħ. What are the main constituents of dettol?ĥ. Name a substance which can be used as an antiseptic as well as disinfectant?Ĥ. :-, :-, :-– are called green house gases (Fleming / lenis pastor)Īns : Co 2, Methane. First viral disease detected in human being was :- (Yellow fever / dengue fever)Ģ.

Tincture: : _, cistamine : : _Īns : Antiseptic, Disinfectant VI. Inner zone of flame : : _, outer zone of flame : : _Ģ. Burning wood and coal causes pollution of air.ġ. Analgesics are the substances that lower the temperature during fever.ĥ. Antibiotics does work for viruses like cold andĢ.

True or False – If false give the correct answer:ġ. Fire produced by oil cannot be controlled by _Īns : Water III. In the presence of water, the ignition temperature of paper is _ĥ. Combustion is a chemical reaction in which and substance react with _Ĥ. Which is the hottest part in the flame of candle _ġ. The lowest temperature at which a substance catch the fire is called its _ĥ. A drug effective in the treatment of pneumonia, and bronchitis, is _ģ.