KERALA PSC / CHEMISTRY / PROPERTIES OF COMPOUNDS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

 

KERALA PSC / CHEMISTRY / PROPERTIES OF COMPOUNDS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

KERALA PSC / CHEMISTRY / PROPERTIES OF COMPOUNDS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

·      Compound is a pure substance that is composed of two or more elements chemically combined in definite and constant proportions

·      The separation of a compound into its elements by chemical means is called analysis

·      The foundation of a compound by the union of elements is called synthesis

·      The common refrigerents are Ammonia and Freon

·      Non-stick kitchen vessels are coasted with Teflon

·      Photographic films are coated with Silver Bromide

·      Artificial rain is done by using Silver Iodine

·      Phosphine (PH₃) has the smell of rotten fish.

·      Hydrogen sulphide gas has the smell of rotten egg

·      Bleaching Powder is chemically calcium chloride hypo chlorite (CaOCl²)

·      Egg shell, Marble, Limestone etc… contain Calcium Carbonate

·      Coral reefs are made of calcium carbonate

·      Greenhouse effect is created by Carbon dioxide, methane, water vapour etc…

·      Dry ice is solid Carbon dioxide

·      Zinc Phosphide and Arsenic Sulphide are used as Rat poison (rodenticide)

·      Laughing gas is Nitrous Oxide

·      Benzyl Chloride is used as tear gas

·      Sodium Peroxide is used as airpurifier in Submarines

·      Tin Amalgam (Sn + Hg) is used to coat on mirror.

·      Paper is chemically cellulose

·      The most abundant carbohydrate (organic compound) present in nature is cellulose

·      Cellulose is not absorbed by human body, due to the absence of cellulose in body

·      Rust is chemically hydrated ferric oxide (Fe₂O₃.x.H₂O)

·      Freezing mixture contains calcium chloride and sodium chloride

·      The gas responsible for Bhopal gas tragedy was methyl iso cyanate (MIC)

·      Fluorosis is due to the excess intake of Fluoride salts along with drinking water.

·      Fluorosis is first reported in India in 1938 in Nellore District in Andra Pradesh

·      Copper oxy chloride is used as fungicide in pepper plants

·      Silver iodide is used to make artificial rain

·      Acid rain is caused by the pollution of environment due to nitrogen oxide and Sulphur dioxide

·      Aluminium is used to make CDs

·      Aluminium and its compounds are amphoteric

·      Oxides are binary compounds of Oxygen and metals or non-metals

·      Acidic oxides show the properties of Acids. Eg: Carbon Dioxide, Sulphur dioxide, phosphorous pentoxide etc…

·      Basic oxides are generally metallic oxides. Eg: Calcium oxide, Sodium Peroxide, Magnesium oxide etc…

·      Neutral oxides are neither acidic nor basic. Eg: Nitrous oxide (N₂O), Carbon monoxide (CO)

·      Amphoteric oxides are showing both the properties of acids and bases. Eg: Aluminium oxide, Zinc oxide, Water

·      Aspirin is called Wonder Drug

·      Aspirin is chemically Acetyl Salicyclic Acid

·      Ordinary Portland Cement (OPC) contains the major component Calcium oxide (Lime)

·      White paints are made by using Titanium dioxide

·      The whitest compound ever known is Titanium dioxide

·      Titanium is referred as wondermetal. Titanium is used to make Air Crafts

·      Nitrous oxide is used as an anesthetic

·      Tranquilizers are chemicals used as medicine for mental disorderness

·      Barbituric Acid and its salts are used a Tranquilizers

·      Sodium compound used in respiratory equipment and submarine is sodium peroxide

·      Rocket propellent contains fuel and oxidizer

·      Rocket fuel is liquid Hydrogen (LHG)

·      Fuel of the future is Hydrogen

·      Analgesics are the drugs used for relieving pain. Eg: Aspirin

·      Antipyretics are the chemicals used to bring sown body temperature. Eg: Paracetamol, Aspirin

·      Disinfectants: Chemical used to kill microorganisms. Eg: Phenol

·      Antibiotics: Chemicals extracted from microorganisms (fungi, mold, bacteria) and can be used to destroy some other microorganisms. Eg: Streptomycin, Penicilin, Chloroamphenicol.

·      Antiseptics: Chemicals that can be applied to living tissues to destroy microorganisms. Eg: Dettol

·      Coke is the refined form of coal (contains the element carbon)

·      Bathing salt is sodium carbonate used to reduce the hardness of water

·      Baking powder is mixture of sodium bicarbonate and Tartaric Acid salt

·      Impure Sodium Carbonate obtained in the industrial process is called black ash

·      Flint glass contains lead chromate. Lead chromate is used as pigments called chrome yellow

·      Rising of dough in the process of manufacture of bread is through the action of carbon dioxide

·      The gas responsible for green house effect is carbon dioxide

·      Ferromagnetic powder is coated in tape recorders

·      Carbon dioxide is used in fire extinguishers

·      Cryolite is a double fluoride of aluminium and sodium

·      Silver halides are used in photographic plates because they are readily reduced by light

·      Rat poison is zinc phosphide

·      The aluminium compound used in fire extinguishers is alum

·      Calcium compound used in freezing mixture is calcium chloride

·      The chemical used as a ‘fixer’ in photography is sodium thiosulphate. It is also known as hypo.

·      Diffusion of light in the atmosphere takes place due to water vapour

·      Ferrous sulphate crystals are known as ‘Green vitriol’

·      The main constituents of pearl are calcium carbonate and magnesium carbonate.

·      Ruby, sapphire, emery or corundum is aluminium oxide (Al₂O₃)

·      Smelling salt is ammonium carbonate (NH4)₂CO₃. Philosophors wool is zinc oxide

·      Nitrous oxide gas, N₂O is used in the manufacture of ice – cream

·      Naturally occurring aluminium silicate is mica. Mica is a bad conductor of electricity and a good conductor of heat.

·      Rock cotton is asbestos.

·      Methyl Bromide is used as pesticide

·      HBFCs ie, hydrobromofluorocarobs used in fire extinguishers

·      Sodium nitrate is used as fertilizer, it is also known as Chilesaltpetre

·      Potassium ferrocyanide is used in the manufacture of Prussian blue

·      Most ionic compound is Caesium chloride

·      Calcium phosphate is found in the bones of animals

·      A mixture of Titanium Tetrachloride and Triethyl aluminium is known as Zeigler-Natta catalyst

·      First artificial element Technetium

·      First artificial plastic Bakelite

·      First artificial sugar Sacharin

·      First artificial rubber Neoprene

·      King of poison arsenic

·      Silicosis is a disease caused due to the breathing of powered silicon

·      Minamatha is a disease caused by excess of mercury

·      Ethai – Ethai is a disease caused by excess of Cadmium

·      Plumbism is the disease caused by excess of lead

·      Nylon is prepared from adipic acid and hexamethylene diamine

·      Mixture of Copper sulphate and calcium hydroxide is known as Bordeaux mixture, it is used as a fungicide

·      Gun powder is a mixture of Sulphur, charcoal and nitre

KERALA PSC / CHEMISTRY / PROPERTIES OF COMPOUNDS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY