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Assistant General Science

Chemistry – 07

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

  • Element having maximum number of isotopes

Tin (10)

 

  • Which amalgam is using as a coating agent in the 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 occurring mineral from which metal can be extracted

Ore

 

  • Impurities present in the ore is 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 seashores of Kerala

Ilmenite and monozite

 

  • Thorium is extracted from

Monozite

 

  • Titanium is extracted from

Ilmenite

 

  • A homogeneous 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…)