Science General Knowledge Question and Answer

1. The term PVC used in the plastic industry stands for

polyvinyl chloride
polyvinyl carbobate
phosphor vanadiu chloride
phosphavinyl chloride

Answer: Option A

2. What among following is used to produce artificial rain ?

copper oxide
carbon monoxide
silver iodide
silver nitrate

Answer: Option C

3. Oil of vitriol is 

nitric acid 
sulphuric acid 
hydrochloric acid 
phosphoric acid 

Answer: Option B

4 Which is used in preparation of dynamite ?

glycerol 
ethyl alcohol 
methyl alcohol 
glycol 

Answer: Option A

5. What is Calcium sulphate ?

epsom salt 
blue vitriol 
gypsum salt 
potash alum 

Answer: Option C

6. Who is regarded as father of modern chemistry ?

Ruterford
Einstein
Lavoisier
C.V. Raman
Answer: Option C

7. Which is not a type of elements ?

Metals
Non Metals
Metalloids
Gases

Answer: Option D

8. Which acid is present in lemon ?

marlic acid
citric acid
lactic acid
tartaric acid

Answer: Option B

9. Identify the wrong statement in the following

Atomic radius of the elements increases as one moves down the first group of the periodic table
Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the
Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

Answer: Option C

10. Rare gases are

mono atomic
di atomic
tri atomic
None of above

Answer: Option A

11. Bleaching action of chlorine is by

decomposition 
hydrolysis 
reduction 
oxidation 

Answer: Option A

12. Which metal is heaviest ?

osmium 
mercury 
iron 
nickle 

Answer: Option A

13. What is a mixture of potassium nitrate powdered charcoal and sulphur called?

paint 
aluminium 
brass 
gun powder 

Answer: Option D

14. Nail polish remover contains ?

benzene 
acetic acid 
acetone 
petroleum ether 

Answer: Option C

The following table enlists the major discoveries/inventions and their discoverers/inventors −

Discovery/InventionDiscoverer/InventorTime/PeriodImage
Magnifying GlassRoger Bacon (Great Britain)13th CenturyRoger Bacon
Printing PressJohannes Gutenberg (German)1440 (About)Johannes Gutenberg
Watch (Portable Clocks)Peter Henlein (Germany)1509 (About)Peter Henlein
Optical Microscope (& also the Compound Microscope)Zacharias Janssen (Dutch)End of 16th CenturyZacharias Janssen
TelescopeGalileo (Italian) (however, in 1608, three inventors namely Hans Lippershey, Zacharias Janssen, & Jacob Metius invented that Galileo improved)1609Galileo
BarometerEvangelista Torricelli (Italian)1643Evangelista Torricell
PianoBartolomeo Cristofori di Francesco (Italian)In the very beginning of 18th CenturyBartolomeo Cristofori di Francesco
Steam BoatDenis Papin (French)1704Denis Papin
Steam EngineThomas Newcomen (British)1712Thomas Newcomen
Watt Steam EngineJames Watt (Scottish)1776James Watt
Mercury ThermometerDaniel Gabriel Fahrenheit(Polish-German)1714Daniel Gabriel Fahrenheit
Achromatic LensJohn Dollond (British)1758John Dollond
SubmarineDavid Bushnell (American)1775David Bushnell
Bifocal LensBenjamin Franklin1770sBenjamin Franklin
Power LoomEdmund Cartwright (British)1784Edmund Cartwright
Gas TurbineJohn Barber (British)1791John Barber
Electric BatteryAlessandro Volta (Italian)1800Alessandro Volta
(Railway) Steam LocomotiveRichard Trevithick (British)1804Richard Trevithick
StethoscopeRené Laennec1819René Laennec
Hygrometer (Crude hygrometer was invented by Leonardo da Vinci in 1480)Johann Heinrich Lambert (French)1755Johann Heinrich Lambert
Electric MotorMichael Faraday (British)1821Michael Faraday
TypewriterWilliam Austin Burt (American)1829William Austin Burt
Sewing MachineBarthélemy Thimonnier (French)1829Barthélemy Thimonnier
DynamoMichael Faraday (British)1831Michael Faraday
TelegraphSamuel Morse (American)1832-33Samuel Morse
Revolver (However, the first Flintlock Revolver patented by Elisha Collier in 1814)Samuel Colt (American)1835Samuel Colt
Pedal Driven BicycleKirkpatrick Macmillan (Scottish)1839Kirkpatrick Macmillan
Pneumatic TireRobert William Thomson (Scottish)1845Robert William Thomson
Francis TurbineJames Bicheno Francis (British American) & Uriah A. Boyden (American)1848James Bicheno Francis
Refrigerator (In 1805, an American inventor Oliver Evans experimented a closed vapor-compression refrigeration cycle for the production of ice)Alexander Twining & James Harrison (However, in 1859, Ferdinand Carré of France developed the first gas absorption refrigeration system)1850Alexander Twining
Elevator/Lift (for the building)Elisha Otis (American)1852Elisha Otis
Machine GunRichard Jordan Gatling (American)1861Richard Jordan Gatling
DynamiteAlfred Bernhard Nobel (Swedish)1867Alfred Bernhard Nobel
Air BrakeGeorge Westinghouse (American)1872George Westinghouse
TelephoneAlexander Graham Bell (Scottish)1875Alexander Graham Bell
Phonograph/ Gramophone1877Phonograph
Film/Movie Camera (However, movie camera was invented by Francis Ronalds in 1845)Louis Le Thomas Alva Edison (American)Prince (French)1888Louis Le Thomas Alva Edison
Electric Lamp/Bulb (by using “a carbon filament”)Thomas Alva Edison (American)1879Thomas Alva Edison
The First Steam-powered AutomobileNicolas-Joseph Cugnot (French)1768N/A
The First Car Powered by an internal combustion Engine fueled by HydrogenFrançois Isaac de Rivaz (French)1807N/A
The First Petrol or Gasoline-powered AutomobileKarl Benz German1886Karl Benz German
Inflatable TireJohn Boyd Dunlop (Scottish)1887John Boyd Dunlop
X-RayWilhelm Conrad Röntgen (German)1895Wilhelm Conrad Röntgen
Radio TelegraphGuglielmo Marconi (Italian)1890sGuglielmo Marconi
Nuclear Reactor (namely Chicago Pile-1)Enrico Fermi (Italian)1942Enrico Fermi
The first general-purpose Electronic Digital ComputerJohn Presper Eckert, Jr. & John William Mauchly (Americans)1945John Presper Eckert, Jr. & John William Mauchly
TransistorWilliam Shockley, John Bardeen & Walter Brattain (Americans)1947William Shockley, John Bardeen & Walter Brattain
Fiber OpticsNarinder Singh Kapany (Indians)1960Narinder Singh Kapany
ARPANET, (the precursor to the Internet)Leonard Kleinrock (American)1969N/A
RadioGuglielmo Marconi (Italian)N/AN/A

Seven Wonders of India

The following table enlists the seven wonders of India (aased on NDTV along with the Ministry of Tourism, Government of India) −

WonderLocationImage
Meenakshi Amman Temple (Devoted to Parvati/Minakshi and Shiva)Madurai, Tamil NaduMeenakshi Amman Temple
Dholavira (Ancient Civilization)Kutch District, GujaratDholavira
Red Fort (Built by Mughal Emperor Shah Jahan in 1648)Delhi (UNESCO World Heritage Site)Red Fort
Jaisalmer Fort (Built by the Rajput ruler Rawal Jaisal in in 1156 AD)Jaisalmer, Rajasthan (UNESCO World Heritage Site)Jaisalmer Fort
Konark Sun Temple (Built by king Narasimhadeva I of Eastern Ganga Dynasty in 1255 AD)Konark, Odisha (UNESCO World Heritage Site)Konark Sun Temple
Nalanda (Was Buddhist monastery and great education center during the ancient kingdom of Magadha)BiharBihar
Khajuraho Group of Monuments (famous for their nagara-style architectural symbolism, it was built between 950 and 1050 by the Chandela dynasty)Chhatarpur District, Madhya Pradesh (UNESCO World Heritage Site)Khajuraho Group of Monuments

Seven Wonders of Industrial World

The following table enlists the seven wonders of the Industrial World −

WonderDescriptionImage
SS Great EasternIt was an iron sailing steam ship designed by Isambard Kingdom Brunel, and built by J. Scott Russell & Co. at Millwall. Location – River Thames, London, UKSS Great Eastern
Bell Rock LighthouseBuilt between 1807 and 1810 by Robert Stevenson on the Bell Rock in the North Sea, it is the world’s oldest surviving sea-washed lighthouse. (Location – off the coast of Angus, Scotland)Bell Rock Lighthouse
Brooklyn BridgeBuilt in 1883, the Brooklyn Bridge is a hybrid cable-stayed/suspension bridge in New York City, USA.Brooklyn Bridge
London Sewerage SystemConstructed in late 19th Century, the London sewerage system is part of the water infrastructure serving London, England.London Sewerage
First Transcontinental Railroad (Pacific Railroad)Built between 1863 and 1869, the Pacific Railroad was a 3,069 km contiguous railroad line of the United States.First Transcontinental Railroad
Panamá CanalConstructed in 1914, Panamá Canal is a man-made 77 km waterway in Panama that connects the Atlantic Ocean (via the Caribbean Sea) with the Pacific Ocean.Panamá Canal
Hoover DamConstructed in 1930s, Hoover dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River. It is located on the border of Nevada and Arizona (in the USA).Hoover Dam

Seven Wonders of Underwater World

The following table enlists the seven wonders of the Underwater World −

WonderDescriptionImage
PalauPalau is an island country located in the western Pacific Ocean.Palau
Belize Barrier ReefThe Belize Barrier Reef is a series of coral reefs straddling the coast of Belize.Belize Barrier Reef
Great Barrier ReefThe Great Barrier Reef is the world’s largest coral reef system along the East of Australian Coast.Great Barrier Reef
Deep-Sea VentsIt is a fissure in a planet’s surface from which geothermally heated water released.Deep-Sea Vents
Galápagos IslandsIt is an archipelago of volcanic islands located on either side of the Equator (in the Pacific Ocean).Galápagos Islands
Lake BaikalIt is a rift lake, located in southern Siberia, Russia.Lake Baikal
Red SeaLying between Africa and Asia, the Red Sea is a seawater inlet of the Indian Ocean.Red Sea

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