Biology 8

നാഡീ വ്യൂഹം, ഹൃദയം എന്നിവയെ കുറിച്ചുള്ള ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Nervous actions initiated by Spinal cord for quick movements to avoid danger is called

                    Reflex actions

• Basic functional unit of nervous system is

                    Neuron

• Neurons carry messages in the form of

                    Electrical impulses

• Part of Neurons that carry impulses is called

                    Axon

• Part of Neurons that receive impulses is called

                    Dendrites

• Chemical which helps in transmission of impulses is called

                    Acetyle Colin

• Protective layer of Axon

                    Myelin Sheath

• Color of Myelin sheath

                    White

• Disease that causes due to loss of neuron in the brain is

                    Alzheimer's disease

• Disease that causes due to loss of neuron which receive signals from brain and spinal cord

                    Parkinson's disease

• Meningitis is affected to 

                    Meninges

• Encephalitis is an infection in brain is caused by 

                    Virus

• Disability of brain to recognize letters and words properly is known as

                    Dyslexia

• Clotting of blood in blood vessels of brain is called

                    Cerebral Thrombosis

• Bleading caused by the breakage of blood vessels of brain is called

                    Cerebral Hemorrhage

• Blockage of blood to brain for what duration will cause unconsciousness

                    5 Seconds

• Biological death means

                    Death of brain cells

• Instrument used to record changes in electrical potential of brain

                    EEG (Electro Encephalo Gram)

• CT scan stands for

                    Computerized Tomographic scan

• MRI scan stands for

                    Magnetic Resonance Imaging scan

• PET scan which used for studying the brain stands for

                    Positron Emission Tomography scan

• Study of heart and its diseases is known as

                    Cardiology

• Busiest organ of the body

                    Heart

• Size of human heart is same as the size of his

                    Fist

• Normal heart beat rate in human

                    70-72 times per minute

• Mean time required for a single cardiac cycle

                    0.8 Sec

• Circulation of blood in body is regulated by

                    Heart

• 2 upper chambers of the heart is called

                    Auricles

• 2 lower chambers of the heart is called

                    Ventricles

• Double membrane that covers heart

                    Pericardium

• Fluid filled in Pericardiam

                    Pericardial fluid

• Which part of the heart is filled with pure blood (carrying Oxygen)

                    Left chambers

• Direction of the blood flowing through the heart is

                    From Auricle to ventricle

• Number of chambers in human heart

                    4

• Chamber that receives the impure blood

                    Right Auricles

• Blood vessel that carries pure blood

                    Artery

• Blood vessel that carries impure blood (carrying CO2)

                    Vein

• Only artery that carries impure blood

                    Pulmonary artery

• Only vein that carries pure blood

                    Pulmonary vein

• Blood vessels that connects arteries and veins are called

                    Cappillaries

• Largest blood vessel (artery) in human body 

                    Aorta

• Largest blood vein in human body 

                    Inferior Venacava

• Average length of blood vessels in human

                    1 Lakh Kms

• Only organ in human body that is not affected by cancer 

                    Heart

• Heart beat in human being start when growth of embryo is

                    4 weeks

• Restless muscles in human body

                    Cardiac muscles

• Muscles that helps heart to beat in same rythm

                    Myocardial muscles

• Condition of more than 100 heart beats per minute

                    Tachycardia

• Condition of less than 60 heart beats per minute

                    Bradycardia

• First heart transplantation surgery was conducted by

                    Dr. Christian Bernad

• First heart transplantation surgery was conducted on

                    3rd December 1967

• First heart transplantation surgery was conducted at

                    Groote Shchuur Hospital, South Africa

• First heart transplantation surgery in India was conducted by

                    Dr. P Venugopal

• First heart transplantation surgery in India was conducted on

                    3rd August 1994

• First heart transplantation surgery in India was conducted at

                    AIIMS, New Delhi

• First heart transplantation surgery in Kerala was conducted by

                    Dr. Jose Chacko Periyappuram

• First heart transplantation surgery in Kerala was conducted on

                    13th May 2003

• First heart transplantation surgery in Kerala was conducted at

                    Medical trust hospital, Cochi

• First heart- lung transplantation surgery was conducted by

                    Dr. Bruce Reits (March 9, 1981)

• First heart- lung transplantation surgery in Kerala was conducted by

                    Dr. Jose Chacko Periyappuram

• First heart- lung transplantation surgery in Kerala was conducted at

                    Lisie Hospital, Ernakulam (16 January 2017)

• First artificial heart

                    Jarvik-7 (By Robert K Jarvik)

• Number of chambers in heart of Mammals, birds, Crocodile

                    4

• Number of chambers in heart of Cockroach

                    13

• Number of chambers in heart of Amphibians and Reptiles

                    3

• Number of chambers in heart of fish

                    2

• Hormone which stimulates heart beat

                    Adrenaline

• Which is known as heart of hearts

                    Pace Maker

• Which is called as the pace maker of the heart

                    SA Node (Sino Atrial node)

• First biological artificial pacemaker was developed in which country

                    Canada

• Disease which damages heart valves

                    Rheumatic Fever

• Instrument used for checking heart alignment

                    ECG ( Electro Cardio Graph)

• ECG was invented by

                    William Enthovan
                                                                                  (To be Continued...)

Biology 7

മൂക്ക്, നാക്ക്, ത്വക്ക്, തലച്ചോർ എന്നീ പ്രധാനഭാഗങ്ങളിൽ നിന്നുള്ള ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Study of nose

                Rhinology

• Loss of smell is called

                Anosmia

• Branch of medicine that deals with condition of ear, nose and throat

                Otolaryngology

• Small projection on the surface for tongue

                Papillae

• Nerve related to the movement of tongue

                Hypoglossal nerve

• Taste buds at the tip of tongue are sensitive to

                Salt and Sweet

• Taste buds at the sides of tongue are sensitive to

                Sour

• Taste buds at the back of tongue are sensitive to

                Bitter

• Largest sense organ

                Skin

• Function of skin

                Excretion and regulation of temperature

• Pigment that gives color to the skin

                Melanin

• Pigment that protects skin from UV rays

                Melanin

• Glands that secrete oily substances called sebum on the skin

                Sebaceous glands

• Outer layer of the skin

                Epidermis

• Thick inner layer of the skin

                Dermis

• Time taken for skin to regenerate

                27-30 Days

• Deficiency of melanin causes

                Albinism

• Diseases affected to the skin

                Eczema, Melanoma, Psoriasis, Albinism

• Melanin present in which layer

                Epidermis

• Total number of nerves in human body

                43 pairs (12 pair of cranial and 31 pair pair spinal)

• Primary command center for the body

                Central nervous system (CNS)

• CNS consist of

                Brain and spinal cord

• Reflex actions are controlled by

                Spinal cord

• Spinal cord has a length of

                45 cm

• The center of co-ordination

                Brain

• Average weight of human brain

                1400 gms

• Protective membrane which envelops the brain and spinal cord

                Meninges

• Part of skull that encloses the brain

                Cranium

• No of bones present in Cranium

                8

• Soft tissue that envelop Cranium

                Scalp

• Largest part of human brain

                Cerebrum

• Part of brain which controls voluntary actions

                Cerebrum

• Part of brain whcih acts as the centre of intelligence, thoughts, emotions, will power, memory, consciousness, imagination, experience, recognition, reasoning, weeping, laughing etc

                Cerebrum

• Outer layer of cerebrum

                Cerebral cortex

• Part of brain which is known as little brain

                Cerebellum

• Center for co-ordination of muscular movements

                Cerebellum

• Primary center for balancing, equilibrium and orientation of body

                Cerebellum

• Alcohol affecting which part of brain

                Cerebellum

• Pain killers affecting which part of brain

                Thalamus

• Relay center of brain

                Thalamus

• Part of brain which controls involuntary actions

                Medula Oblongata

• Part of brain which acts as center for working of heart, contraction of blood vessels, respiratory actions, sneezing, coughing and vomiting

                Medula Oblongata

• Part of brain nearest to the spinal cord

                Medula Oblongata

• Part of brain which acts as center for hunger, thirst, sweating, sleep, temperature, love and hate

                Hypothalamus

• Thermo regulatory center of human body

                Hypothalamus

• Part of brain which controls secretion of pituitary hormons

                Hypothalamus

• Only one neurocrine gland in human body

                Hypothalamus

• Hormons produced by hypothalamus

                Oxytocin and vasopressin

• Hormon which is called as ADH (Anti Diuretic Hormone)

                Vasopressin

• Hormon which controlling the water balance of the body

                ADH

• Hormon which helps the contraction of uterus during parturition

                Oxytocin

• Condition caused by the excessive thirst and excretion of excess urine due to the insufficient vasopressin in the body is called

                Diabetes insipidus
                                                                               (To be Continued...)

Biology 6

ജീവശാസ്ത്രത്തിലെ കണ്ണ്, ചെവി എന്നിവയുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Study of eyes and eye diseases

                 Ophthalmology

• Outer layer of eyes

                 Schlera

• Middle layer of eyes

                 Choroid

• Inner layer of eyes

                 Retina

• Layer of eyes which supplies nutritions

                 Choroid

• Circular transparent front portion of eyes

                 Cornea

• Lens in eyes

                 Biconvex lens

• Image formed on the retina of eyes is

                 Real and inverted

• For normal eyes near point is 

                 25 cm

• Thin covering that protects cornea

                 Conjunctiva

• Curtain like partition behind cornea

                 Iris

• Opening at the centre of Iris

                 Pupil

• Portion that controls the light enters eye

                 Pupil

• Which is regulating the size of pupil in eyes

                 Iris

• Light sensitive layers are present in which layer

                 Choroid

• Ability of eyelens to adjust its focul length is known as

                 Power of accomodation

• Cells responsible for dim light vision

                 Rods

• Cells responsible for Bright light vision and color vision

                 Cone cells

• Owls cannot see during day time due to the absence of 

                 Cone cells

• Point where no rod and cone cells are present and no image formation happening

                 Blind spot

• Name of the pigment that helps to see in dimlight

                 Rhodopsin

• Light sensitive pigment of rod cells 

                 Rhodopsin

• Light sensitive pigment of cone cells 

                 Iodopsin

• Jelly like substance filled in between lens and retina

                 Vitreous humor

• Fluid filled in between Iris and cornea

                 Aqueous humor

• Focal length of the lens is adjusted by\ligments that holds lens in place

                 Ciliary body

• Tear producing glands in eye

                 Lachrymal gland

• Enzyme present in tears

                 Lyzosyme

• Eye transplantation surgery includes

                 Cornea, Schlera and vitreous humor

• Cornea transplantation surgery is known as

                 Keratoplasty

• Short sight is also known as

                 Myopia

• In case of Myopia the image is formed at

                 In front of the retina

• Long sight is also known as

                 Hypermetropia

• In case of Hypermetropia the image is formed at

                 Behind the retina

• Presbyopia is caused by

                 eduction in elasticity of lens

• Situation in which image is not clearly formed due to irregular curvature of cornea

                 Astigmatism

• Squint eyes can be corrected by

                 Eye surgery

• Myopia can be corrected with

                 Concave lens

• Hypermetropia can be corrected with

                 Convex lens

• Both Myopia and hypermetropia can be corrected with

                 Bifocal lens

• Astigmatism can be corrected with

                 Cylindrical lens

• Color blindness was discovered by

                 John Dalton

• Person suffering from Color blindness unable to distinguish

                 Red and Green colors

• Eye diseases that occurs due to the deficiency of Vitamin A

                 Night blindness and Xerophthalmia

• Loss of vision in dim lights is called

                 Night blindness

• Eye diseases that occurs when iris become dry and opaque is called

                 Xerophthalmia

• Clouding of eyesdue to ageing

                 Cataract

• Eye diseases due to the increased pressure in the eye ball

                 Glaucoma

• Inflamation or infection of conjunctiva is called

                 Conjunctivitis or red eyes or Madras eye

• Organ which maintains the balance of the body

                 Ear

• Part of ear which helps hearing

                 Cochlea

• Semicircular canals, Vestibules, Pharynx etc are parts of

                 Ear

• Part of ear which has the shape of snail shell

                 Cochlea

• Instrument used for examining outer ear drum

                 Otoscope

• Hammer shaped bone in ear

                 Malleus

• Anvil shaped bone in ear

                 Incus

• Stirrup shaped bone in ear

                 Stapes

• Smallest bone in human body

                 Stapes
                                                                  (To be Continued...)

Chemistry 10

അമോണിയ, കാർബൺ ഡയോക്സൈഡ്, ഹാലൊജനുകൾ തുടങ്ങിയവയുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Which is called as Fools gold

                    Iron Pyrites

• Which is called as White gold

                    Platinum, Cashew nut

• Which is called as Flowing gold

                    Petroleum

• Which is called as Black gold

                    Petroleum, Pepper

• Which is called as Blue gold

                    Water

• Which is called as Green gold

                    Vanila

• Which is called as Blac diamond

                    Coal

• TNT stands for

                    Tri Nitro Toluene

• Acids used in manufacturing of TNT

                    Mixture of concentrated Nitric acid and sulphuric acid

• Ammonia is a compound of 

                    Nitrogen and Hydrogen (NH3)

• Process of manufacturing Ammonia industrially

                    Haber Process

• Catalyst used in Haber process

                    Iron

• Gaseous ammonia was first produced by 

                    Joseph Priestly

• Most soluble gas in water

                    Ammonia

• Only gas which shows alkaline nature

                    Ammonia

• Intermediate gaseous product formed in the decaying process of dead organisms

                    Ammonia

• Substance which is used as coolant in ice plants

                    Ammonia

• Substance which is used as coolant in refrigerators

                    Freon

• Acid which is used to identify ammonia

                    Nessler's reagent

• Color of ammonium chloride

                    White

• Major green house gases are

                    Carbon dioxide, Methane, Nitrous oxide

• Gas mainly causes global warming

                    Carbon dioxide

• Solid carbon dioxide is called as 

                    Dry Ice

• Gas which is released during the process of fermentation

                    Carbon dioxide

• Amount of Carbon dioxide in atmosphere

                    0.03%

• Gas which turns milk of lime milky

                    Carbon dioxide

• Gas used as fire extinguisher

                    Carbon dioxide

• Gas released due to the partial burning of substances

                    Carbon monoxide

• Gas present in soda water

                    Carbon dioxide

• The name Halogen means

                    Salt former

• Halogens which are extracted from sea water

                    Chlorine, Bromine, Iodine

• Element which is least metallic in nature

                    Fluorine

• Element which has highest reactivity or electro negativity

                    Fluorine

• Second most electro negative element

                    Oxygen

• Which is called as super halogen

                    Fluorine

• Which is called as synthetic halogen

                    Astatine

• Which is called as solid halogen

                    Iodine

• Which is called as pseudo halogen

                    Cyanogen

• Most abundant halide present in earth's crust

                    Fluoride

• Gas which is used for purifying water (using in swimming pools)

                    Chlorine

• Solvent used as an anaesthetic

                    Chloroform

• Compound of chlorine used in plastics

                    Poly Vinyl Chloride (PVC)

• Element used as a bleaching agent either in solid or liquid form

                    Chlorine

• Halogen which is present in liquid form in nature

                    Bromine

• Non metal that exists in liquid state at room temperature

                    Bromine

• Most commonly used halogen available as tablet

                    Iodine

• Element which is abundant in sea weeds

                    Iodine

• Color of carbohydrate in Iodine

                    Dark Blue

• Chemical used in photographic films

                    Silver bromide

• Substances using for artificial raining

                    Silver Iodide, Dry Ice

• Rarest element in earth

                    Astatine

• Heaviest known halogen

                    Astatine

• Lightest known halogen

                    Fluorine

• Gas responsible for Bhopal Gas tragedy

                    Methyl Isocyanate
                                                                                   (To be Continued...)

Chemistry 9

ഹൈഡ്രജൻ, ഓക്സിജൻ, നൈട്രജൻ, തുടങ്ങിയ വാതകങ്ങളുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Hydrogen was discovered by

                  Henry Cavendish

• Meaning of the word Hydrogen

                  Water producer

• Based on atomic mass which is the smallest atom

                  Hydrogen

• Which is considered as the simplest atom\lightest gas

                  Hydrogen

• Largest atom

                  Francium

• Densest atom

                  Radon

• Element which produces largest number of compounds

                  Hydrogen

• Non metal element which showing metalic characters

                  Hydrogen

• Element which is not included in any group

                  Hydrogen

• Element which is present in all acids

                  Hydrogen

• Element which has the second lowest boiling point and melting point among all substances

                  Hydrogen

• Gas which burns blue in color

                  Hydrogen

• Element that does not have neutrons in atom

                  Hydrogen

• Gas which is used for making Vanaspati ghee

                  Hydrogen

• Hydrogen is not using for domestic purpose because of its 

                  Explosive nature

• Fuel used in rockets

                  Liquid Hydrogen

• Which is known as fuel of future

                  Hydrogen

• Fuel which doesn't cause any pollution

                  Hydrogen

• Isotops of Hydrogen are

                  Protium, Deuterium, Tritium

• Which isotope of Hydrogen is considered as the ondinary Hydrogen

                  Protium

• Which is called as heavy Hydrogen

                  Deuterium

• Chemical name of Heavy water

                  Deuterium Oxide

• Chemical name of Super heavy water

                  Tritium Oxide

• Most abundant isotope of Hydrogen

                  Protium

• Simplest radio active element\Radio active isotope of Hydrogen

                  Tritium

• Isotops which are using for the manufacturing of Hydrogen bomb

                  Deuterium, Tritium

• Most abundant compound present in animals and human body

                  Water (About 65-70% of bodymass)

• Scientist who proved that water is a compound of Hydrogen and Oxygen

                  Henry Cavendish

• The matter which can exist in Solid, Liquid and gaseous forms

                  Water

• High boiling point of water is due to

                  Hydrogen bonding

• Which is known as universal solvent

                  Water

• Chemical name of water

                  Dihydrogen monoxide (H2O)

• Purest water in nature

                  Rain water

• Temporary hardness of water is due to the presence of 

                  Bicarbonates of Calcium and Magnesium

• Temporary hardness of water can be removed by

                  Repeated boiling or adding lime

• Permanent hardness of water can be removed by

                  Distillation or by adding Sodium Carbonate (Washing soda)

• Gas which has the smell of rotten eggs

                  Hydrogen Sulphide

• Compound of Hydrogen using as bleaching agent

                  Hydrogen peroxide (H2O2)

• Compound of Hydrogen which has the structure of an open book

                  Hydrogen peroxide

• Gas which helps substances to burn but doesn't burn itself

                  Oxygen

• Number of atoms present in Oxygen molecule

                  2

• Number of atoms present in Ozone molecule

                  3

• Hydrogen and Oxygen are named by

                  Lavoisier

• Gas which is colorless, tasteless and odourless

                  Oxygen

• Color of Oxygen and Ozone in solid and liquid form

                  Light Blue

• Atmospheric layer in which Ozone is present

                  Stratosphere

• Substance which deplete the Ozone layer

                  Chlorofluoro Carbon (CFC)

• Industrial name of CFC

                  Freon

• Element in CFC which destroys ozone 

                  Chlorine

• Gases used in aquatic lungs of sea divers for respiration

                  Mixture of Helium and Oxygen

• Nitrogen was discovered by

                  Daniel Rutherford

• Main content of protein

                  Nitrogen

• Examples of Nitrogen fixing bacterias

                  Rhizobium, Axetobacter, Clostridium

• Nitrogen compound which is used in photographic plates

                  Silver Nitrate

• Most nitrogenized fertilizer

                  Urea

• Gas formed in atmosphere during lightning

                  Nitrogen dioxide

• RDX stands for

                  Research Department Explosive

• Explosive known as cyclonite

                  RDX

• Explosive known as trotyl

                  TNT
                                                                                              (To be Continued...)

Chemistry 8

രസതന്ത്രത്തിലെ പ്രധാന പ്രക്രിയകൾ, കാർബൺ, ബോറോൺ, സൾഫർ, ഫോസ്ഫറസ് എന്നിവയുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ

• Process of extracting Magnesium is called

                 Dow Process

• Process of extracting Sodium is called

                 Down's Process

• Process of industrial production of Hydrogen  is called

                 Bosch Process

• Production of Nitric acid is called

                 Ostwald Process

• Production of Noble metals is called

                 Cyanide Process

• Industrial production of Steel is called

                 Bessemer Process

• Production of Sulfuric acid is called

                 Contact Process

• Production of Chlorine Gas is called

                 Deacon's Process

• Production of Hard water is called

                 Girdler Sulphide Process

• Production of Ammonia is called

                 Haber Process

• Production of Sodium Carbonate is called

                 Solvey Process

• Process of extraction of salt from sea water is known as 

                 Evaporation

• Purification process of sea water is known as 

                 Distillation

• Which is known as the fundamental element of life

                 Carbon

• Examples of Crystalline carbon

                 Diamond, Graphite, Graphene, Fullerene

• Examples of Amorphous carbon

                 Coal, Coke, Charcoal, lamp black

• Most stable form of carbon

                 Graphite

• Non metal allotrope of carbon that conduct electricity

                 Graphite

• The substance which is known as black lead

                 Graphite

• Substance which is used to make lead pencils

                 Graphite

• Allotrope of carbon which is used as moderator in nuclear reactor

                 Graphite

• Ball shaped allotrope of carbon

                 Fullerene

• Allotrope of carbon which is used for purifying sugar, gas, water, gold etc

                 Charcoal

• Fuel used in blast furnace

                 Coke

• Diesel oil is produced by the hydrogenation of 

                 Coke

• Charcol perform purification by the process of 

                 Adsorption

• The process of accumulation of gas or liquid molecules on the surface is known as

                 Adsorption

• Ability of a substance to attract water molecules from surrounding environment is known as

                 Hygroscopy

• Hardest substance in Earth

                 Diamond

• Second hardest substance in Earth

                 Corundum

• Scale which is used to measure the hardness of Diamond

                 Mohs Scale

• Hardness of diamond

                 10 mohs

• Hardness of corundum

                 9 mohs

• Sunstance which has the highest melting point

                 Tungsten (3422° C)

• White powder which is used as polish in carrom board

                 Boric acid

• Acid which is used as an antiseptic and eye lotion

                 Boric acid

• Main component of stiff and shine which is used while washing clothes

                 Borax

• Compound of Boron which is having the same structure of benzene (Inorganic benzene)

                 Borozene

• Structure of benzene was discovered by

                 Keule

• Number of atoms present in Sulphur molecule

                 8

• Element which have no radio active isotop

                 Sulphur

• Gas which cause fading of color of Taj Mahal

                 Sulphur dioxide

• Gases which cause fading of Silver

                 Sulphur dioxide, Hydrogen sulphide

• Element which is known as enemy of Copper

                 Sulphur

• Allotrops of Sulphur

                 Monoclinic sulphur, Plastic sulphur, Rhombic sulphur

• Gases causing acid rain

                 Sulphur dioxide, Oxides of Nitrogen

• Mixture of Sulphur and charcoal is known as 

                 Gun Powder

• Element which meant "I carry light"

                 Phosphorus

• Element which has smell of garlic

                 Phosphorus

• Element which emit green light on exposure to atmosphere

                 White Phosphorus

• Element which is kept under water

                 White Phosphorus

• Element which burns in atmosphere at 30° C

                 White Phosphorus

• Element which is using for making safety matches

                 Red Phosphorus

• Element which is using for making match sticks

                 Pottassium Chlorate

• Phosphorous compound which has the smell of rotten fishes

                 Phosphine

• Element which is known as king of poisons

                 Arsenic

• Most poisonous substance

                 Arsenic

• Study of poisons

                 Toxicology

• Substance which is used as rat poison

                 Zinc Phosphide
                                                                         (To be Continued...)

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...)