General Science For Competitive Exams

• Which metal has the highest melting point?

Ans: Tungsten

• Which is the most abundant element in the Moon?

Ans: Oxygen

• Molish test is used to detect the presence of _____.  

Ans: Carbohydrates

• Which is the most abundant type of coal?

Ans: Bituminous

• Which halogen is used as an antiseptic?

Ans: Iodine

• Plaster of Paris is prepared by heating _____.

Ans: Gypsum

• Which element has the largest number of isotopes?

Ans: Tin

• Silver objects turn dark on prolonged exposure to air due to the formation of _____. 

Ans: Silver sulphide

• Who discovered the radio carbon dating?

Ans: Willard Franck Libby

• Which sugar is found maximum in honey?

Ans: Fructose

• Which disease is also known as 'Bronchocele?

Ans: Goitre

• In human body, the structure to which appendix is attached?

Ans: Large intestine

• Which hormone regulates calcium & phosphate in human body?

Ans: Parathyroid hormone

• The presence of which salts in in water causes 'Blue baby syndrome'?

Ans: Nitrates

• Trichology is the study of _____. 

Ans: Hair

• Some substances change from a solid to a gas when heated, without becoming a liquid between. This is known as ______. 

Ans: Sublimation

• Which type of lens is prescribed for the correction of astigmatism?

Ans: Cylindrical

• Which is the smallest unit of an element that take part in a chemical reaction?

Ans: Electron

• What is the period of revolution of a geostationary satellite?

Ans: 24 hours

• Which type of mirror is used in the headlamp of cars?

Ans: Parabolic concave

• Eustachian tube connects which parts of the body?

Ans: Ear & throat

• Number of molecules contained in one mole of a gas is called _____.  

Ans: Avogadro number

• Which acid is usually present in the fizzy soft drinks?

Ans: Carbonic add

• Which property of a star is indicated by its colour?

Ans: Temperature

• Which metal is used in the storage batteries?

Ans: Lead

• Who invented the ultrasound scanning?

Ans: Ian Donald

• In the process of dialysis, used on kidney patients, the phenomenon involved is ____.

Ans: Osmosis

• Which is the longest key in a computer keyboard?

Ans: Space bar

• Which part of brain controls the heart beats?

Ans: Medulla Oblongata

• Which gas is used for the artificial ripening of fruits?

Ans: Ethylene

• Which organ of body purifies blood?

Ans: Kidney

• Which microorganisms cause the foot & mouth disease in animals?

Ans: Virus

• The radio active disintegration of uranium ultimately leads to ____. 

Ans: Lead

▪ Which gas is used in the welding industry?

Ans: Acetylene

• What is the use of a commutator?

Ans: To change the direction of electric current

• Which is known as the stress hormone' in plants?

Ans: Abscisic acid

• What are the examples for the day neutral plants?

Ans: Tomato & cotton

• Which plant hormone is found in the leaves & fruits?

Ans: Abscisic acid

▪ The biological nitrogen fixation occurs in roots of leguminous plants with a symbiotic association with _____ bacteria?

Ans: Rhizobium bacteria

▪ The plants that make their own food by the mechanism of photosynthesis is known in which name?

Ans: Autotrophs

▪ Few plants, specially fungi, cannot make their own food & depends on others. They are called as ______. 

Ans: Heterotrophs

▪ Which macro nutrient is essential for the enzyme activation, water balance, ion balance & stomatal opening in plants?

Ans: Potassium

• Malacophity is the pollination by ______ in plants?

Ans: Snails

• The pollination by ants in plants is known as ______. 

Ans: Myrmecophily

• Which part of flower develop as pericarp of fruit after fertilisation?

Ans: Ovary wall

• In which year was the Mission Indradhanush launched?

Ans: December-25, 2014

• Bunchy top disease in banana is caused by _____.

Ans: Virus

▪ Which disease is diagnosed through the Tourniquet test?

Ans: Dengue

• Which disease caused many deaths among labourers during the construction of the Panama Canal?

Ans: Yellow fever

▪ What is the optimum range of temperature for the proper work of enzymes?

Ans: 35-40 degree Celsius

• 2, 4-D, atrazine & glyphosate are examples of _____. 

Ans: Herbicides (weed killers)

• According to Botanical Survey of India, which state accounts for the highest number of flowering plants in the country?

Ans: Tamil Nadu

• The plants which flower only once in their lifetime are called ______.

Ans:  Monocarpic

• Ageing in human beings is caused by the disappearance of which gland?

Ans: Thymus gland

• The process involved in the passage of food in alimentary canal is _____.

Ans:  Peristalsis

• Which organs are affected by the disease malaria?

Ans: Spleen & liver

• The disorder of which organ is detected through the tread mill test?

Ans: Heart

• The Bowman's capsule is associated with which organ?

Ans: Kidneys

• Which diseases are prevented through Tripple vaccine?

Ans: Whooping cough, Tetanus & Diphtheria

• A person suffering from colour blindness cannot distinguish which colours?

Ans: Red & green

• Which is the chief nitrogenous waste in humans?

Ans: Uric acid

▪ Who is known as 'the father of cloning'?

Ans: Ian Wilmut

• Which hormone promotes blood circulation?

Ans: Adrenalin

• Which rays are used to detect the smuggling of precious metals?

Ans: X-rays

• Which metal is extracted through the Mond's process?

Ans: Nickel

• What is the wave length of visible light?

Ans: 3900 to 7600 Angstrom

• Which metal is used in the catalytic converters in cars to reduce the pollution from exhaust gases?

Ans: Platinum

• Liquefied natural gas or INC is natural gas is predominantly composed of _____.

Ans: Methane

• Which solution is used to conduct the glucose test?

Ans: Benedict solution

• When an iodine solution turns blue black, it indicates the presence of _____.

Ans: Starch

• What are the common examples for the mono atomic elements?

Ans: Inert gases (Helium, Argon, Neon)

• Bessemer process is associated with the production of ______.

Ans: Steel

• Which Indian born American physicist is known as the Father of Fiber Optics'?

Ans: Narinder Singh Kapany

• Which kind of cells in the human blood has the longest life span?

Ans: Erythrocyte

• Who was the first scientist to decode the language of bees?

Ans: Karl von Frisch

• Tamiflu is a frontline drug against which disease?

Ans: Bird Flu

• Which genetic disease is mostly associated with the Royal families?

Ans: Haemophilia

• Which is the example of roots that contain chlorophyll capable of photosynthesis?

Ans: Assimilatory roots

• Which plant hormone is useful in the formation of roots?

Ans: Cytokinins

• Spermology is the study of _____.

Ans: Seeds

• Which is the first phase of mitotic division?

Ans: Prophase

• Which period in the history of Earth is known as ‘the Age of Reptiles'?

Ans: Mezozoic Era

• Cactus is a modified form of _____.

Ans: Stem

• The total kinetic energy of molecules in a substance is known as _____. 

Ans: Heat

• Which is the only anthropoid ape found in India?

Ans: Hoolock Gibbon

• The property of some substances to absorb light of one wavelength and emit light of a longer wavelength is known as _____. 

Ans: Fluorescence

• What is the other name of hydrated aluminum oxide?

Ans: Bauxite

• Which is the largest lymphatic gland in human body?

Ans: Spleen

• Which disease is caused by Treponema palledium?

Ans: Syphillis

• Which organism can move according to the magnetic force of the Earth?

Ans: Snail

▪ Which plant tissues provides support to growing shoots & leaves of plant body?

Ans: Collenchyma

• Which pigment gives purple / blue color to flowers?

Ans: Anthocyanin

• Which plant tissues are mainly responsible for food storage & conduction of substances?

Ans: Parenchyma

• Periplaneta Americana is the scientific name of _____. 

Ans: Cockroach

▪ Which microorganism is also known as ‘slipper animal cube'?

Ans: Paramecium

▪ The hard parts of the plant body are made up of which tissues?

Ans: Sclerenchyma

• Who coined the word 'Gene’?

Ans: Johanson

• Which is the smallest unit of computer memory?

Ans: Bit

• Which is the sixth form of matter?

Ans: Fermionic condensate

▪ What is known as the King of Inventions'?

Ans: Steam engine

• Who was the first scientist to state that the Earth revolves round the Sun?

Ans: Copernicus

• What is added to petrol in cold countries to avoid freezing?

Ans: Ethylene Glycol

▪ The amount of matter is measured in _____.

Ans: Mole

• Which instrument is used in the submarines to view the surface of the water?

Ans: Periscope

• What converts mechanical energy into electrical energy?

Ans: Dynamo

• Which type of lens is used in cameras?

Ans: Convex lens

• Which type of glass is used for making lenses?

Ans: Flint glass

• Which was the first organic compound prepared in laboratory?

Ans: Urea

• The nuclear radiation first affects which organ of the human body?

Ans: Brain

• Which metal is used to make the covering of nuclear reactors?

Ans: Lead

• What is known as 'artificial silk'?

Ans: Rayon

• Which gas is commercially produced through Bosch Process?

Ans: Hydrogen

• Which element has the largest atom?

Ans: Caesium.