Chemistry 7

ടിൻ, ലെഡ്, ടൈറ്റാനിയം, ഇരുമ്പ്, പ്രധാനപ്പെട്ട അയിരുകൾ, പ്രധാനപ്പെട്ട ലോഹ സങ്കരങ്ങൾ അവയുടെ ഉപയോഗങ്ങൾ എന്നിവയാണ് ഇന്നത്തെ പാഠത്തിൽ ഉൾപ്പെടുത്തിയിട്ടുള്ളത്

• Element having maximum number of isotops

                   Tin (10)

• Which amalgam is using as a coating agent in reflective mirror

                   Tin amalgam

• Metal which is used in storage batteries

                   Lead

• Element which is using as an anti-knocking agent in petrol

                   Lead

• Most stable substance in nature

                   Lead

• Metal which does not allow the passage of laser through it

                   Lead

• Element which is burst out through the vehicle exhaust pipe

                   Lead

• Elements which are used in safety fuse

                   Tin and Lead

• Alloy of tin an lead which used for making fuse wire is

                   Solder

• Alloys of tin an lead can be separated by

                   Melting

• Metal which shows poorest electrical conductivity

                   Lead

• Metal used to make the parts of aircrafts

                   Titanium

• White paints are made by the oxides of 

                   Titanium

• Whitest compound ever known is

                   Titanium dioxide

• Metal of future or wonder metal

                   Titanium

• When Iron rusts, its weight

                   Increases

• Process of coating Iron with Zinc is called as

                   Galvanization

• Purest form of Iron that contains the least amount of Carbon is 

                   Wrought Iron

• Impure Iron is called 

                   Pig Iron

• An Iron powder compound coated in tape recorder is 

                   Ferromagnetic powder

• An element which is used in making rest resistance alloys

                   Cobalt

• Metals in Stainless steel

                   Iron, Chromium and Nickel

• Rust is chemically

                   Iron oxide

• The overall process by which metals are extracted from ores

                   Metallurgy

• Naturally occuring mineral from which metal can be extracted

                   Ore

• Impurities present in the ore in known as

                   Gangue

• Substances which is used to neutralize and remove Gangue

                   Flux

• Gangue mixed with Flux to form

                   Slag

• Example of Acidic Flux

                   Silica

• Example of Basic Flux

                   Lime Stone

• Minerals abundant on the sea shores of Kerala

                   Ilmenite and monozite

• Thorium is extracted from

                   Monozite

• Titanium is extracted from

                   Ilmenite

• A homogenous mixture of one metal with another metal or non metal is known as

                   Alloys

• Elements in the alloy Type Metal

                   Copper, Tin, Lead and Antimony

• Elements in the alloy Gun Metal

                   Copper, Tin, Zinc

• Elements in Alnico

                   Aluminium, Nickel, Cobalt and Iron

• Elements in Nichrome

                   Nickel, Iron and Chromium

• Elements in Invar

                   Nickel and Iron

• Elements in Duralumin

                   Aluminium, Copper, Manganese, and Magnesium

• Elements in Silumin

                   Silicon and Aluminium

• Elements in Magnalium

                   Magnesium and Aluminium

• Elements in Steel

                   Carbon and Iron

• Elements in Cherome Steel

                   Iron, Chromium

• Elements in German Silver

                   Copper, Nickel and Zinc

• Elements in Sterling Silver

                   Copper, Silver

• Elements in Electrum

                   Gold, Silver

• Elements in Constantan

                   Copper, Nickel

• Elements in Newton Metal

                   Bismuth, Lead, Tin

• Elements in Rose Metal

                   Bismuth, Lead, Tin, Cadmium

• Alloy using for manufacturing Barrel of Gun

                   Gun Metal

• Alloy using for manufacturing heating elements

                   Nichrome

• Alloy using for manufacturing Silver coin

                   Sterling Silver

• Alloy using for manufacturing Pendulum

                   Invar

• Alloy using for manufacturing Springs

                   Chrome Steel

• Ores of Magnesium

                   Dolomite, Magnesite

• Ores of Aluminium

                   Bauxite and Cryolite

• Ores of Lead

                   Galena, Cerussite

• Ore of Calcium

                   Gypsum

• Ores of Iron

                   Haematite, Magnetite, Iron Pyrites

• Ores of Copper

                   Malachite and Chalcolite

• Ore of Uranium

                   Pitch Blende
                                                                                     (To be Continued...)