Invention / Discovery

Q.  Who discovered natural radioactivity?

A.  Hentry Bequeral

Q.  Hydrogen was discovered by?

A.  Cavendish

Q.  Who discovered Argon?

A.  Ramsay

Q.  Name the scientist who proposed pH value?

A.  Sorenson

Q.  Who discovered the Law of Gravitation?

A.  Sir Isaac Newton

Q.  Who discovered penicillin?

A.  Alexander Fleming

Q.  Who invented elevator?

A.  EG Otis

Q.  Who invented Radar ?

A.  Robert Watson Watt

Q.  Who discovered Florescence?

A.  Sir George Stokes

Q.  Who was the inventor of stainless steel?

A.  Brearley

Q.  Who invented television?

A.  John baird

Q.  Who invented the stethoscope and when?

A.  In 1816, the French physician Rene Theoplhie Laennec (1781-1826) introduced a perforated wooden cylinder which concentrated the sounds of air flowing in and out of the lungs, and described the sound which it revealed. The modern form of stethoscope, with flexible tubes connecting the earpieces to a circular piece placed against the chest, was developed later in the nineteenth century.

Q.  How did arithmetical numbers come into existence? Where was ‘zero’ invented?

A.  The arithmetical numbers, which are universal today, were first invented system in India. This is known as Hindu numeral system. It simplified calculations by marking the values of a number depend on its position as well as the number itself. In the number 444, the single figure 4 represents 400, 40 and 4, and the whole number is the sum of these values. In contrast, the Romans used symbols whose values were the same irrespective of their positions.

Hindu numeral system included a zero. So, zero was first invented in India. Zero revolutionised arithmetical calculations and the numeral system. It was adopted by the Arabs and then reached Europe as early as in 10th century.

Q.  Who invented insulin?

A.  Insulin is a very useful drug for diabetes and was discovered by the Canadian physician and Nobel price winner , Dr.Federik Grant Banting in 1921.

Q.  Magnifying glass was invented by

A.  Roger Bacon

Q.  Polio vaccine was invented by

A.  Jonas Edward Salk

Q.  Who discovered the Blood groups

A.  Karl Landsteiner

Q.  Television was invented by

A.  John L. Baird

Q.  Wireless Telegraph was invented by

A.  Marconi

Q.  Incandescent lamp was invented by

A.  Edison

Q.  X-Ray was discovered by A.  Wilhelm Roentgen Q.  Chloroform was invented by A.  J.Y. Simpson Q.  Who invented the practical Locomotive A.  Richard Trevithick Q.  Who invented Microprocessor A.  Ted Hoff Q.  Who invented dynamite? A.  Alfred Nobel Q.  What creature's fossilized leg bone did John Horner discover red blood cells in, in 1993? A.  A tyrannosaurus rex's. Q.  What suntan lotion was developed by Dr. Ben Green in 1944 to protect pilots who bailed out over the Pacific? A.  Coppertone. Q.  What was Friedrich Serturner the first to extract from opium and use as a pain reliever? A.  Morphine. Q.  What computer company was named after a founder's memories of spending a summer in an Oregon orchard? A.  Apple. Q.  What weapon did German gunsmith August Kotter unload on the world in 1520? A.  The rifle. Q.  What type of machine did 19-year-old French genius Blaise Pascal invent to help his dad do taxes in 1642? A.  An adding machine. Q.  What Benjamin Holt invention was good news to farmers in 1900? A.  The tractor. Q.  What landmark invention did Ts'ai Lun invent from bark and hemp in the second century? A.  Paper. Q.  What did "Art Fry invent after scraps of paper to mark tunes in his hymnal kept falling out? A.  Post-it Notes. Q.  What did Leonardo invent to check humidity while he worked on the Last Supper fresco? A.  The hygrometer. Q.  What country was the first to register a patent on polyester? A.  Briton. Q.  What "foot doctor" held over 300 patents? A.  Dr. Scholl. Q.  What 1947 invention by Bell Telephone Laboratories spawned pocket-sized radios? A.  The transistor. Q.  What disease prompted polio vaccine inventor Dr. Jonas Salk to come out of retirement in 1987? A.  AIDS. Q.  What was the occupation of cotton candy machine inventor William James Morrison? A.  Dentist. Q.  What Italian astronomer invented the thermometer in 1592? A.  Galileo. Q.  What did George Nisser invent after observing high wire performers bouncing on safety nets? A.  The trampoline. Q.  What century saw the invention of the shoelace? A.  The eighteenth. Q.  What name did George Eastman invent in 1888 because it was easy to memorize, pronounce, and spell? A.  Kodak. Q.  What innovative inventor's Dymaaxion car could carry eleven passengers, exceed 120 mph and get 30 miles per gallon in 1934? A.  Buckminster Fuller's. Q.  What type of structure did R. Buckminster Fuller patent in 1954? A.  The geodesic dome. Q.  What century saw Alexander Cummings issued the first patent for a flush toilet? A.  The eighteenth. Q.  What portable device did James Spengler invent in 1907, using a soap box, pillow case, a fan and tape? A.  The vacuum cleaner. Q.  What landmark invention eased farming chores for Sumerians in 3500 B.C.? A.  The plow. Q.  What food product did Hyppolyte Merge-mouries invent in 1868 by treating oils with hydrogen? A.  Margarine. Q.  What British second lieutenant got the idea to fill a canister shell with musket balls and a charge of gunpowder? A.  Sir Henry Shrapnel. Q.  Who averaged one patent for every three weeks of his life? A.  Thomas Edison. Q.  What kitchen invention took the top prize at the 1893 Chicago World's Fair? A.  The dishwasher. Q.  What company gave the world the first electric toothbrush? A.  Interplak. Q.  What Edwin Budding invention began changing the face of English landscapes in the 1820s? A.  The lawn mower. Q.  What invention for keeping cold air out of buildings in winter was patented by Theophilus Van Kannel in 1888? A.  The revolving door.

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Energy

Q. What cooking fuel is produced by heating wood without oxygen?
A. Charcoal.
Q. Which will yield the most BTUs of energy--a gallon of oil, a pound of coal or a gallon of gasoline?
A. A gallon of oil.

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Electronics

Q.  Why are fuse provided in electric installations?

A.  A safety fuse is made of a wire of metal having a very low melting point. When excess current flows in, the wire gets heated, melts and breaks the circuit. By breaking the circuit it saves electric equipment or installations from damage by excessive flow of current.

Q.  What is ESP?

A.  ESP means extra sensory perception, i.e., perception or communication outside of normal sensory activity, as telepathy and clairvoyance.

Q.  Who is the Father of electricity

A.  Michael Faraday

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Chemistry

Q.  Why does a liquid remain hot or cold for a long time inside a thermos flask? A.  The presence of air, a poor conductor of heat, between the double glass wall of a thermos flask, keeps the liquid hot or cold inside a flask for a long time. Q.  Why is it recommended to add salt to water while boiling dal? A.  By addition of salt, the boiled point of water gets raised which helps in cooking the dal sooner. Q.  Why do some liquid burn while others do not? A.  A liquid burns if its molecules can combine with oxygen in the air with the production of heat. Hence, oil burns but water does not. Q.  What chemical is represented by the symbol Sn? A.  Tin Q.  During digestion Proteins are broken into what? A.  Amino Acids Q.  Which alloy is used for making air-crafts? A.  Duralumin Q.  How harmful is caffeine? A.  Caffeine is a type of chemical, known as an alkaloid, which occurs in several kinds of plant. Biologists do not fully understand why plants such as coffee and tea make caffeine, but one theory is that it has evolved as a natural herbicide to help growing shrubs overcome competing plants. The effects of caffeine vary. Women retain caffeine in their body for much longer when they are pregnant, where as smokers eliminate caffeine twice as quickly as non-smokers. The most noticeable effect is to stimulate the nervous system; people whop are sensitive to caffeine will certainly sleepless if they drink ordinary coffee before going to bed. However, the body can become habituated to caffeine and many regular coffee drinkers can take a cup or two in the evening without their sleep being disturbed. Other physiological effects of caffeine include stimulating the production of urine and susceptible to irregular heart rhythms and palpitation find that these are triggered by caffeine. Caffeine dose not accumulate in the body, so its effects are short-lived. But it has been accused at one time or another of contributing to most of the serious health problems of the 20th century, including heart disease, cancer and birth defects. Q.  Presence of bicarbonates of Calcium and Magnesium in water leads to A.  Temporary hardness of water Q.  Stainless steel contains A.  Ans : Iron, Chromium and Nickel Q.  White phosphorus is stored under A.  Water Q.  Which gas comes in third position in volume in atmosphere after Nitrogen & Oxygen? A.  Argon Q.  Amalgam is an alloy in which one of the compound is A.  Mercury Q.  Atomic number is equal to A.  Number of protons Q.  Which is the anti-knocking compound used in petrol in order to enhance the capacity of petrol engine? A.  Tetra Ethyl Lead Q.  "Aqua Regia" is a mixture of A.  Hydrochloric acid and Nitric acid Q.  The chief chemical component of pearl is A.  Calcium carbonate Q.  Global warming is due to increased production of all the following, except A.  Carbon dioxide Q.  Which acid is present in lemon A.  Citric acid Q.  Brass is an alloy of copper and A.  Zinc Q.  The hardest natural substance known in the world is A.  Diamond Q.  Permanent hardness of water may be removed by the addition of A.  Sodium carbonate Q.  Which is Vinegar? A.  Acetic acid Q.  Which of the following gas is used in cigarette lighters? A.  Butane Q.  Baking Soda is also known as A.  Sodium bicarbonate Q.  Bond order of a molecule can be at the maximum of A.  3 Q.  Neutral molecules in which one of the carbon atoms has six valence electrons are called A.  Carbenes Q.  Which of the following is non-radioactive? A.  Deuterium Q.  Which of the following is a thermo setting plastic? A.  PVC Q.  By which process, Octane number of petroleum can be increased? A.  Atomization Q.  Atoms of the same element having the same atomic numbers but different atomic weights are called A.  Isotopes Q.  What is the main constituent of soap? A.  Sodium hydroxide Q.  Name a fertilizer that contain maximum amount of Nitrogen A.  Urea Q.  Which compound is called oil of wintergreen? A.  Methyl Salicylate Q.  What is alum? A.  Potassium Aluminium Silicate Q.  A minute amount of radio isotope is called A.  Tracer Q.  Name an alloy of copper, antimony and tin A.  Babbitt metal Q.  Which is the most commonly used bleaching agent? A.  Chlorine Q.  What is the main component of egg shell? A.  Calcium carbonate Q.  Which type of fire extinguisher is used for extinguishing petroleum fire? A.  Powder type Q.  The purest form of carbon is A.  Diamond Q.  A substance which can react chemically as either an acid or a base is known as A.  Amphoteric Q.  Give an example for a Tribasic acid A.  Phosphoric acid Q.  38. What is "White Vitriol"? A.  Zinc Sulfate Q.  Which among the following element is stored under water? A.  White Phosphorous Q.  Cyanide Process is widely used to extract A.  Gold Q.  What is commonly known as "Blue vitriole"? A.  Copper sulfate Q.  Fluorspar is the ore of A.  Calcium Q.  The gas used in refrigerators and ice plants is A.  Ammonia Q.  Carbon monoxide is readily absorbed by A.  Nickel Q.  Synthetic ethanol is produced by reacting ethane (in the presence of phosphoric acid) with A.  Hydrogen Q.  What is called in the bond between two amino acids in protein A.  Peptide bond Q.  Which metal remains in liquid form at normal temperature? A.  Mercury Q.  Common salt (Sodium Chloride) when kept open absorbs moisture from air. This is due to the presence of A.  Magnesium Chloride Q.  The movement or growth of an organism or part of an organism in response to a chemical stimulus A.  Chemotropism Q.  Chemistry in ancient times was called A.  Alchemy Q.  Name a food material which contains phosphorus A.  Onion Q.  Usually, base changes the colour of litmus from A.  Red to Blue Q.  Who discovered penicillin A.  Alexander Fleming Q.  What radioactive element is extracted from carnotite and pitchblende? A.  Uranium. Q.  What color does litmus turn when dipped into acid? A.  Pink. Q.  What is arginine? A.  An amino acid obtained by animals from their diet

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Biology

Q.  Which genes on activation cause Cancer?

A.  Oncogenes

Q.  The bacteria that causes “Anthrax “disease, lives in the form of spores(able to cause infection):

A.  For 30—40 years.

Q.  Inability to sleep is termed as

A.  Insomnia

Q.  Normal respiratory rate in adults is

A.  16-20/min

Q.  One gram of carbohydrate yields

A.  4 calories

Q.  The nerve which carries messages from the brain and spinal cord muscles and glands

A.  Motor nerve

Q.  In Which month of Age, Eruption of teeth starts?

A.  6

Q.  Total number of bones in human body

A.  206

Q.  The following are the contents of ORS, except

A.  Calcium Carbonate

Q.  Protein requirement for a pregnant woman per day

A.  55gm

Q.  Radio active cobalt and radium are used for the treatment of which diseases?

A.  Cancer

Q.  How many times a healthy person can donate blood in a year?

A.  Three or Four

Q.  The cells that are responsible for the production of antibodies are

A.  White blood cells

Q.  Which is the immunity get by the body after the first attack of disease

A.  Acquired immunity

Q.  Which is an example for the disease caused by bacteria

A.  Typhoid

Q.  Typhoid is transmitted through

A.  Water and food

Q.  The disease that spread through sexual contact is

A.  AIDS

Q.  Drinking of alcohol will severely affects the

A.  Liver

Q.  Average weight of a new born baby

A.  3kg

Q.  How many drops in One ml?

A.  15

Q.  How much ml in one teaspoon?

A.  5ml

Q.  Drugs used to relieve pain

A.  Analgesics

Q.  Incubation period of measles

A.  7-14 days

Q.  Mode of transmission of typhoid fever

A.  Oro facial

Q.  Route of transmission of Hepatitis-B

A.  Potential (parental)

Q.  Name the oral Polio vaccine

A.  Sabin

Q.  Heart attack is caused mainly due to

A.  Cholesterol

Q.  Another name of Vitamin C

A.  Ascorbic Acid

Q.  The heart is covered by a membrane called

A.  Pericardium

Q.  Bird Flu, is a type of

A.  Influenza

Q.  The causative agent of Tetanus is

A.  Clostridium tetani

Q.  Gonorrhea is a sexual disease caused by a bacterium called

A.  Neisseria gonorrhea

Q.  Bordetella pertussis is a bacterium caused

A.  Whooping cough (Pertussis)

Q.  Diphtheria in man is caused by

A.  Corynebacterium diphtheria

Q.  German measles is caused by

A.  Rubella virus

Q.  Common cold is caused by the infection of

A.  Rhinovirus

Q.  Influenza is caused by a virus called

A.  Myxovirus

Q.  The organism which cause cholera is

A.  Vibrio cholera (Bacterium)

Q.  A disease which is always present at a low level in a given population or region is called

A.  Endemic

Q.  An epidemic (disease) which spreads across whole continents is called

A.  Pandemic

Q.  The time during which a person is capable of passing the disease on to another person

A.  Infective period

Q.  The excess of carbohydrate is converted into Glycogen by

A.  Liver

Q.  Anemic patient is deficient of which element

A.  Iron

Q.  Malaria affects

A.  Spleen

Q.  Toxoid serum is used in the treatment of

A.  Diphtheria

Q.  The blood group which contain no antibodies is

A.  AB

Q.  Oxygenation is the main function of which organ

A.  Lungs

Q.  What is known as the "Juvenile hormone"?

A.  Thymosin

Q.  Which vitamin is also called "Retinol"?

A.  Vitamin A

Q.  The transportation of oxygen to the cells in the body is performed by

A.  Hemoglobin

Q.  The gastric juice in the stomach contains

A.  Hydrochloric acid

Q.  Bone is used as a fertilizer because it contains

A.  Phosphorous

Q.  Name the product obtained by the destructive distillation of wood

A.  Charcoal

Q.  What organ of a buffalo did Plains Indians use to make yellow paint?

A.  The gallbladder.

Q.  What sticky sweetener was traditionally used as an antiseptic ointment for cuts and burns?

A.  Honey.

Q.  What can mutagens cause?

A.  Mutations.

Q.  The most effective pesticide for general use against most garden pests is?

A.  Malathion

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