Science For You

[Perfection]

What is bronze ?
An Alloy of Cu and Sn

What is galvanizing ?
Coating of Iron with Zinc

What is euchlorine ?
Gaseous mixture of Cl and ClO2

What is Freon ?
CCl2F2, Refrigerant

What is BHC ?
Benzene Hexa Chloride, an insecticide

Which fuel is used in spirit lamps ?
Ethyl alcohol

What is the formula of bleaching powder ?
CaOCl2

What is DDT ?
Dichloro Diphenyl Trichloro Ethane, an insecticide

Who invented microchip ?
Jack S Kilby

The process of union of two or more molecules of a substance to form a large single molecule is called
Polymerisation

[Perfection]

The most abundant element in the earth crust is
Oxygen

Glass is mostly produced by heating to about 1400C
Limestone, Silica and Soda Ash

Fats and their derivatives occurring in living systems are collectively known as
Lipids

Solder is an alloy of
Lead and Tin

Iodine is administered to patients suffering from
Giotre

The process of bleaching by Chlorine is called
Oxidation

The Combustible material on the tip of a safety match stick is
Antimony Sulphide

Which term is used to express purity of gold ?
24 carats

German silver is an alloy of
Copper, Nickel and Zinc

Which is the hardest metal ?
Tungsten

[Perfection]

Which Copper alloy is used for the manufacture of resistance wire?
German Silver

Which Copper alloy is used for the manufacture of gears and bearings ?
Gun metal

Which is the most reactive element ?
Fluorine

The process which brings about chemical decomposition of a substance by water is called
Hydrolysis

Alloys of Mercury are called
Amalgams

Which element was used by Rutherford in his famous scattering experiment?
Gold

Smoking of cannabis is known to increase the levels of a brain chemical called
Dopamine

Rusting of iron is an example of
Oxidation

The first attempt to explain the structure of the hydrogen atom was made by
Niels Bohr

Which is he most reactive hydrogen atom in alkanes ?
Tertiary

[Perfection]

As the Atomic Number increases, electron affinity
Decreases

Milk is a mixture of
Carbohydrates, fats, proteins and water

Who invented Aspirin ?
Herman Dreser

Which is the brightest form of Carbon ?
Diamond

What is white Vitriol ?
Zinc Sulphate

Name the element in solid state having the lowest density ?
Lithium

Which is the first artificial fibre ?
Rayon

What is the chemical name of gypsum ?
Calcium sulphate

Which instrument is used to measure radioactivity ?
Geiger Muller Counter

Who discovered Penicillin ?
Alexander Fleming

[Perfection]

What is nitinol ?
An alloy of nickel and titanium

Which is the lightest gas ?
Hydrogen

What is the chemical name of dynamite ?
Glyceryl trinitrate

What is philosophers wool ?
Zinc Oxide

Which substance is known as Chinese white ?
Zinc Oxide

What is the chemical name of Soda water ?
Carbonic acid

Which liquid is known as 'super liquid' ?
Liquid Helium

Which is the metal contained in vitamin B12 ?
Cobalt

Which is the first artificial paint ?
Perkin's Mauveince

What is the chemical name of marble ?
Calcium carbonate

[Perfection]

What is the chemical name of vitamin C ?
Ascorbic acid

What is the chemical name of mothball ?
Naphthalene

Where is white phosphorous kept ?
In water

Where is Sodium and Potassium kept ?
In kerosene

Which is the metal burns in water ?
Sodium

Which liquid is having the maximum density ?
Mercury

Who discovered Formic acid ?
J Roy

Name the barometer without any fluid ?
Aneroid barometer

Which acid is seen in curd ?
Lactic acid

Surface area of human skin is
25 sq ft

[Perfection]

Dilute acetic acid is known as
Vinegar

What is aqua fortis ?
Nitric acid

Which is the main component of natural gas ?
Methane

Which compound is used as rat poison ?
Zinc phosphate

Which substance is known as Epsum salt ?
Magnesium sulphate

What is the chemical name of Plaster of Paris ?
Calcium Sulphate

Which steel is used to make blade ?
High carbon steel

Which element has the maximum density at normal temperature ?
Osmium

What are main elements of sun ?
Hydrogen and Helium

Which radioactive element is seen in Kerala ?
Thorium

[Perfection]

Which radioactive element is seen in Kerala ?
Thorium

What is the chemical name of salt petre ?
Potassium Nitrate

What is hypo ?
Sodium thio sulphate

What is the percentage composition of Nitrogen in the atmosphere ?
80 % by volume

What is butter antimony ?
SbCl3

What is the composition of gun powder ?
Potassium Nitrate, charcol and Sulphur

How is a sulphide ore concentrated ?
Froth flotation

What are miscelle ?
Aggregated colloids

What are tartar emetic ?
Potassium anti monyl tartrate

How is tartar emetic used ?
Used to induce vomiting

[Perfection]

What is microcosmic salt ?
Sodium ammonium hydrogen phosphate

What is Lunar caustic ?
Silver nitrate

Name the raw materials used for the manufacture of Bakelite ?
Phenol and Formaldehyde

What is amatol ?
80% of TNT, 20% of NH4NO3

What is TNT ?
Tri Nitro Toluene

What is Fenton's reagent ?
FeSO4 + H2O2

What is Tollen's reagent ?
Alkaline silver nitrate

What is LPG ?
Liquefied Petroleum Gas

What is Prussian blue ?
Ferric Ferro cyanide

What is cream of tartar ?
Potassium hydrogen tartrate

[Perfection]

What is Fehling's solution ?
Mixture of CuSO4 & Sodium potassium tartrate

What is the use of Fehling's solution ?
To detect sugar

What is Sublimation ?
Converting a solid directly into its vapour

Name a metal which is a liquid at 0 C?
Mercury

Name a non-metal which is a liquid at 0 C?
Bromine

What is Lithopone ?
Barium sulphate + Zinc sulphide

What is purple of cassius ?
Colloidal gold and stannic hydroxide

What is iron rust chemically called ?
Hydrated Ferric oxide

What is washing soda ?
Sodium carbonate

What is Bayer's reagent ?
Alkaline KMnO4