General Science MCQs

Important general science mcqs provides comprehensive knowledge of sciences, our universe and things related to our day to day life. General science is an essential part of all classes and competitive exams. Keeping the exams in mind, these general science mcqs are solely prepared to improve aspirant knowledge in general science disciplines in everyday life.

General Science MCQs

The most abundant element present in the human body is oxygen, comprising approximately 65.0% of body mass.

The second most common element in the human body is Carbon.

The most abundant elements present in universe is Hydrogen.

The most abundant element present in the Earth’s crust is oxygen (46.1%).

The second most abundant element in the Earth’s crust is Silicon.

The most abundant elements in sea water are Sodium and Chlorine.

The temperature of liquid nitrogen is -196°C (− 320 °F).

If a large number of people are enclosed in a room, then Oxygen decreases and carbon dioxide increases.

For Practise: Everyday Science Quizzes

Colour of sky without Sun would be black.

As the temperature of ice rises, the ice melts and its density Increases. 

Growing children require comparatively more Proteins.

Total volume of blood in a normal human being is 5-6 liters.

Common ‘table salt‘ is sodium chloride (NaC1).

Balloons are filled with helium and hydrogen.

In a normal resting person the rate of heartbeat is 72. 9.

Soft drinks typically contain water, sweetener and carbon dioxide.

Soft drinks contain significant quantities of Caffeine. 

Acetic acid is used for seasoning of food.

Rain water is considered the purest form of water.

Carbohydrates are the ready source of energy for the athletes.

Glycogen is an example of carbohydrate. 

The lifespan of a red blood cell is 120 days. 

Fats have maximum calories.

Monsoon is caused by Seasonal reversal of winds.

Violent winds and rain are called clones.

It is difficult to cook on mountains because of Low atmospheric pressure.

The humidity in the air tells us about the ratio of Water vapors in the air.

Ammonia gas is lighter than air.

Gas used in refrigerator to cool water is ammonia.

Copper was metal first discovered by man.

The gas used in advertising lights is Neon. 

Phosphorous is used in match sticks.

The body temperature of a normal man is 98.6°F (37°C. 4.). 

Carbon dioxide inhaled in air is approximately 0.4%. 

The speed of sound in dry air at 20 °C is 343 meters per second. (1,235 km/h).

The chemical name of washing soda is Sodium Carbonate.

 Hardness of water can be removed by adding sodium carbonate. 

 Violet color has the shortest wave length.

A mammal, which can fly is bat. 

The density of water is greatest at 4°C.

Density of ice is less than liquid water.

The ozone layer is present about 15-30km in atmosphere above earth.

The ozone layer protects the earth from Ultraviolet rays sent by the sun.

The first layer of atmosphere is known as troposphere.

There is a hole in the Ozone Layer at South Pole.

Wood is the main raw material for the manufacture of Paper.

The energy generation in stars is due to Fusion of light nuclei.

Fuel used in rocket includes kerosene, alcohol, hydrazine and its derivatives, and liquid hydrogen.

Most metals conducts heat and electricity.

 The main function of ribosome’s is protein synthesis. 

The main function of the kidneys is to remove waste products from the body.

 Ultra filtering units of kidney are known as Nephrons.

In human body Gall Bladder is part of the Digestive system.

Skin is the largest organ of human body.

Veins carry blood from the human body to the heart.

Substances used to bring relief in pain are called Analgesics.

White blood cells protect our body against disease.

The major use of sulfuric acid is in the production of fertilizers.

In the human body, the appendix attached to the large intestine.

Temperature in human beings is controlled by Hypothalamus gland.

Growing children require comparatively more Proteins.

Amino acids are a product of the digestion of Proteins.

 Enzymes are organic catalysts made up of proteins. 

Hydrochloric acid is necessary for easy digestion of Proteins.

The device which converts the chemical energy into electrical energy is battery. 

The production of genetically identical offspring is called as cloning.

 Boiling of an egg is a change which is chemical in nature.

 The protein content of edible portion of egg is 13.3%.

Glucose is virtually the sole fuel for the human brain.

 Filtration is a method for separating an insoluble solid from a liquid.

The density of water is roughly 1 gram per millilitre.

Water is a universal solvent for Biochemical reactions.

Forensic science is the application of science to criminal and civil laws.

 The lifespan of Red Blood Cells is 120 days.

 Sensory neurons carry message to brain and spinal cord.

 RNA is principally involved in the synthesis of proteins.

 Accumulation of salts in kidneys results in kidney stone.

A lunar eclipse occurs when the Moon moves into the Earth’s shadow.

Day and night change due to Earth’s rotation on its axis.

 The acid used in a car battery is Sulphuric acid. 

 Storage batteries commonly contain Lead. 

 The gases which are used by divers as an artificial atmosphere are Helium and Ox gen. 

 In human eye, the light sensitive layer made of specializes nerve cells, rods and cones is called as retina.

The conversion of large insoluble food substances into soluble ones by the action of enzymes is called digestion. 

Greenhouse gases include carbon dioxide, water vapor, nitrous oxide, methane, , ozone and some artificial chemicals such as chlorofluorocarbons (CFCs).

Ability of the air to absorb long heat waves from the earth after allowing the short waves from sun to pass through it, is known as Green House Effect.

There are only three primary colors in a white light which are red, blue and green. 

The energy possessed by water in a dam is gravitational potential energy. 

Silver is best conductor of electricity.

Caustic soda is extensively used for making soap and detergents.

Monomers of proteins are called Amino Acids.

Mitochondria are often called the power houses of the cell.

Meat provides the largest number of Kcal of energy.

  The compound used in anti-malarial drug is Chloroquine.

 Graphite is used in pencils.

The element required for solar energy conversion is Silicon.

The electrical device which transforms voltage is transformer.

 Rayon is known as artificial silk.

 The human cell contains 46 chromosomes.

According to classifications, the living organisms are divided into 5 kingdom system. 

An ordinary mobile phone communicates by using Radio waves.

 Dolphins are the most highly intelligent mammals.

 Troposphere is layer of atmosphere which lies close to earth.

Hydrogen is used in making ghee. 

Cornea is part of human eye which can be donated.

The central nervous system is made up of the brain, spinal cord and nerves.

The cerebrum controls reading, thinking, learning, speech, emotions and planned muscle movements like walking

In the human skull, the facial skeleton consists of fourteen bones in the face.

DNA stands for deoxyribonucleic acid.

DNA is contained in 46 chromosomes found in 23 pairs in the nucleus of nearly every cell of the human body.

Sensitive layer of the eye is Retina. 

  Proteins are made up of hundreds or thousands of smaller units called amino acids. 

Biological death of a patient means death of tissues of the Brain. 

 Substances which bring down the body temperature are known as Antipyretics.

General Science MCQs on Solar Systems

Sun is made of 91.0% hydrogen and 8.9% helium.

By mass, the Sun is about 70.6% hydrogen and 27.4% helium.

The time light takes from Sun to reach Earth is 8 minutes and 20 seconds.

Light from Sun travels a distance of 150 Million Km before it reaches Earth.

The age of the solar system is 4.5 billion years. 

Sun is an ordinary star, at the the center of the Solar System.

The diameter of the sun is 1.3927 million km.

The solar system has 8 Planets. (Pluto is no more a planet).

Mercury is the smallest planet in our solar system.

Mercury is the fastest planet of the solar system.

The biggest planet in solar system is Jupiter. 

Outermost planet of the solar system is Neptune.

The planet nearest to the Sun is Mercury.

The number of natural satellite orbiting around the planet Mars is 2.

Venus is known as the “Morning Star”.

Mercury metal is 13 times heavier than water.

The planet of the solar system which has maximum number of Moons is Saturn.(Saturn has overtaken Jupiter as the planet with the most moons, according to US researchers.)

Only one planet in the solar system has any atmosphere which is Earth. 

It only takes 23 hours, 56 minutes and 4.0916 seconds for the Earth to turn once its axis.

Venus is known as the veiled planet.

North Star is known as the ‘Constant Star’.

There are two moons of Mars.

A Solar Flare is a sudden flash of increased brightness on the surface of the Sun.

The Andromeda galaxy is the closest big galaxy to our Milky Way galaxy.

 A unit of length equal to the average distance between the earth and sun is called Astronomical unit.   

Solar eclipse occurs when the moon is between the sun and the earth.

The sun generates energy from a process called nuclear fusion.

A light-year is the distance a beam of light travels in a single Earth year. (6 trillion miles (9.7 trillion kilometers)

Read More About: Solar System

General Science MCQs on Plants

At 40° C or above temperature the rate of photosynthesis stops altogether.

It is dangerous to sleep under trees at night because plants give out Carbon dioxide.

Herbivore feed on plants and their products.

An omnivore is an animal that has the ability to eat and survive on both plant and animal matter.

Cellulose is the main chemical substance in the plant cell wall.

All plants and animals need nitrogen to make amino acids, proteins and DNA.

  Green plants in the sea are useful for the respiration of fish because they give out oxygen.

Plant Tropisms control plant responses to environmental stimuli.

The three elements needed for healthy growth of plants are N, P and K.

Plants growing on other plants are called as Epiphytes.

Blue and red types of light are strongly absorbed by plants.

The process of photosynthesis in plants takes place in Leaf.

General Science MCQs on Field of Sciences

Polymath means a person of wide knowledge or learning. 

The study of how the human body works is Physiology.

Ornithology is the study of Birds.

Acoustics is the science of Sound.

Study of life in outer space is known as Exobiology. 

Pedagogy is the science of Teaching.

The study of how plants and animals interact with one another and with the non-living environment is called as Ecology.

Scientific study and measurement of behaviour is called Psychology. 

Etymology refers to the study of Words.

Biology is the study of all living things. 

Branch of biology ‘paleontology‘ deals with study of Fossils.

The science which deals with heredity is known as Genetics.

Study of fingerprints is called Dactylography.

The branch of zoology, which deals with the study of insects, is called Entomology.

The science which deals with study of manners and customs of peoples is Ethnology.

Read more About: Branches of Science

General Science MCQs on Chemical Elements and Alloys

Diamond is an allotropic form of the element Carbon. 

Stainless steel is mainly an alloy of Chromium and Nickel. 

Bauxite is one of Aluminum Ores.

 Marble is metamorphic rock.

Hematite is a common iron ore with a formula of Fe₂O₃.

Bronze is an alloy of Copper and Tin.

The hardest substance known is Diamond. 

Diamond is the purest naturally occurring crystalline form of Carbon.

The alloy of copper and zinc is known as brass. 

Liquids which evaporate quickly are known as volatile.

Glass is a super cooled liquid

The metal known as quick silver is mercury. 

Cobalt is a hard, grey metal which is ferromagnetic.

Zinc oxide is called philosopher’s wool.

Chromium is used in making of alloys.

Diamond is composed of a single element, namely Carbon.

Metalloid chemical element has properties of a metal and non-metals.

  The constituent elements of Bronze are tin and copper.

Uranium-235 is used in the fission process.

The most abundant natural Iron oxide are hematite and magnetite.

General Science MCQs on Discovery and Inventions

Edward Jenner discovered ‘vaccine’ in 1796.

The scientist who discovered penicillin is Alexander Fleming.

The scientist who discovered hydrogen Henry Cavendish. 

Telephone was invented by Alexander Graham Bell and Antonio Meucci

 X-rays were discovered in 1895 by Wilhelm Conrad Roentgen.

Insulin was discovered by Dr. F.G. Banting.

Centigrade scale was devised by Celsius.

Galileo discovered the satellites of Jupiter.

Eratosthenes was the first to measure earth’s radius.

Oxygen was discovered by Joseph Priestley.

Cell was first discovered by Robert Hooke.

The scientist who discovered sulfuric acid is Jabir bin Hayan. 

Carbon dioxide was discovered by Joseph Black. 

Read more about: Scientific Discoveries and Inventions

General Science MCQs on Measuring Instrument

 The instrument for measuring the speed of wind is Anemometer. 

The temperature of a human body is measured by an instrument known as thermometer.

Sphygmomanometer measures Blood pressure.

Richter scale is used to measure the intensity of Earthquakes.

Hygrometer is used for measuring the humidity in air.

An ammeter is a measuring device used to measure the electric current in a circuit.

Relative density of milk is measured by an instrument known as lactometer.

Hydrometer is used to measure Specific gravity of a liquid.

The device used to measure radioactivity is GM counter. 

  Unit Henry is the measurement of Inductance. 

 Watt is the unit to measure Electricity.

 The instrument which measures very high temperature is Pyrometer. 

  Unit Celsius (Centigrade) is the measurement of Temperature.

The rate at which a current changes direction is called its Frequency (Unit is hertz).

The SI unit of force is Newton.

The unit of total water content of the soil is known as Holard.

 Unit of storage capacity of a hard disk is Megabyte. 

The ampere (A) is a basic SI unit of electric current.

The SI unit of charge is Coulomb. 

Curie is a unit of radioactivity.

The amount of ozone in the atmosphere is expressed in Dobson Units.

General Science MCQs on Human Health and Disease

Infectious diseases can be passed from person to person through body secretions, insects or other means.

Malaria is a disease which affects the Liver. 

Dialysis is used in the case of a patient suffering from Kidney problems.

Schizophrenia is a chronic brain disorder.

Polio is caused by a virus.

Smallpox diseases is caused by virus.

Diabetes is caused due to malfunctioning of Pancreas.

 Deficiency of Iodine causes Goiter diseases. 

Lock Jaw, difficulty in opening the mouth, is a symptom of Tetanus

Rabies is caused by a Virus and it affects the nervous system. 

Calcium is involved in blood clotting.

Addison’s disease is caused by damage to the adrenal glands.

Chicken pox is caused by Virus.

“Anaemia” is caused due to deficiency of Iron.

Hepatitis means inflammation of the liver.

 In jaundice disease skin colour becomes Yellowish. 

The disease diphtheria affects the Throat in the human body.

Deficiency of Iodine causes Goitre diseases.

Biopsy test helps in diagnosis of cancer.

AIDS is caused by HIV (Human Immunodeficiency Virus). 

Blood glucose is raised by all hormones except insulin.

Diabetes mellitus is a metabolic disease that causes high blood sugar.

Asthma disease causes difficulty in breathing.

Influenza is caused by virus.

 BaciIle Calmette-Guerin (BCG) is a vaccine for tuberculosis (TB) disease.

The blood glucose level is reduced by insulin.

Hepatitis C causes damage to the liver mainly in the form of inflammation.

One of the infectious diseases conveyed from one person to another through air is Tuberculosis

Autopsy is connected with Post mortem

The device with which variation of blood flow can be heard is called stethoscope.

Joseph Lister discovered antiseptic surgery.

General Science Questions

The art of breeding Silkworm and production of Silk is called Sericulture. 

In fusion reactions, two light atomic nuclei fuse together to form a heavier nucleus and release a large amount of energy.

 If water contracts on freezing, Ice would become denser.

Hot liquid rock beneath the earth’s surface is called magma.

Sea divers use a mixture of gases for breathing during diving. The mixture is called Hydreliox.

The nuclear reaction taking place on the surface of sun is fusion reaction. 

Ammonium nitrate is used in agriculture as a high-nitrogen fertilizer.

Protein digestion is carried out by an enzyme called pepsin in the stomach chamber.

Duodenum is part of the Digestive System in the human body.

Gastrin is not a digestive enzyme in the human system.

 Spleen is not an endocrine gland.

 Insulin is secreted in Pancreas.

Heart patients should avoid taking excess of Fats.

 Yeast is added to raise the dough while making bread.

The substance that gives away electrons is oxidized.

The number of bones in the human body is approximately 206.

Heat from the sun is received by the earth through Radiation. 

 All forms of energy that we use are ultimately transformed into Heat energy.

Erythrocyte red blood cell, usually disc-shaped and without a nucleus. 

The rupturing of red blood cells is called Hemolysis. 

The desert mammal which does not drink water is Kangaroo Rat.

Laughing gas has chemical composition of Nitrogen + oxygen.

 The main ore of mercury is cinnabar.

A hormone secreted by pancreas is insulin.

The usual raw materials for ceramics are clay minerals.

 Polyamides are synthetic polymers commonly known as Nylon. 

 Information can be sent over long distances in the form of radio waves through air.

An electric current can produce chemical, heating and magnetic effect.

There are two shielding gases commonly used for arc welding, and these are argon and helium.

 Examples of thermoplastic materials are polyethylene, polypropylene, polyvinyl chloride, and polystyrene.

Cancer can be treated by surgery, chemotherapy, radiation therapy, hormonal therapy, targeted therapy and synthetic lethality.

The stratum (layer) of atmosphere in which ozone layer lies is called as Stratosphere.

 Metamorphic rocks are formed by the alteration of pre-existing rocks by Treat heat or pressure.

 In physics, elasticity is the ability of a body to resist a distorting influence and to return to its original size and shape when that influence or force is removed.

The efficiency of a machine is always less than 100 percent

 In physics, energy is a property of matter.

Heavenly objects, which resemble stars and emit radio waves, are called quasars. 

Botanically, a fruit is a ripened ovary.

 Granite is a form of intrusive igneous rock.

The mixture which can dissolve platinum is Aqua Regia. 

 Electric current is caused by the flow of electrons. 

 Energy is used in science to describe how much potential a physical system has to change.  

Magnetism is the force exerted by magnets when they attract or repel each other.

Echo is a reflection of sound that arrives at the listener with a delay after the direct sound.

The building blocks of elements are called Atoms.

 Gravity is one major force that creates tides.

Water loss from leaves through stomata is called as transpiration. 

Dengue virus is transmitted by female mosquitoes mainly of the species Aedes aegypti. 

 The separation of visible light into its different colors is known as dispersion.

Phosphoric acid is a colorless, odorless crystalline liquid.

Anemia is a condition in which you lack enough healthy red blood cells to carry adequate oxygen to your body’s tissues.

Insoluble fiber helps speed up the transit of food in the digestive tract and helps prevent constipation.

The number of the spinal nerves in the man is 31 pairs.

The waves used in Sonar are ultrasonic waves.

 Isotopes are atoms of the same element with different number of Neutrons. 

 Velocity is a Vector quantity.

Telepathy is Communication by means other than sensory perceptions.

  Constellation is Patterns or groups of stars in the sky.

 Prolactin hormone is responsible for production of milk in human body.

 Cholesterol level is analyzed in Blood sample.

 Optical Fiber System is a Telecommunication System.

The speed of sound is less than the speed of light.

Recording of brain waves from outer surface of head is called E.E.G.

Sedimentary rocks are Porous.

Television signals are converted into light signals by Photo diode.

The age of a tree can be known from its Number of rings on its trunk.

 Light consists of seven colours of a rainbow.

 Persons with AB+ blood group are considered to be universal recipient.

Deficiency of chloride causes the impaired growth in Infants.

 The major part of natural gas, petroleum and coal consists of Methane. 

 Bio gas is the common name of Natural gas. 

Urine of a diabetes patient contains more than average quality of Sugar. 

 Water is a good solvent of ionic salts because it has a high dipole moment.

 The clouds float in the atmosphere because of their low Density.