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Q. Laser was invented by
(A) Alessandro Volta
(B) William Sturgeon
(C) Hero of Alexandria
(D) Theodore Maiman

The answer is: (D) Theodore Maiman

Everyday Science MCQs

• Which of the following gas is responsible for fermentation?
• Energy stored in Dam water is:
• During the process of digestion of food the proteins are broken down in to ____________ in the presence of Proteolytic Enzymes.
• From the Sun, the Earth is the ________ planet in the solar system.
• Which light is more important for photosynthesis?
• Which of the following lens are useful in microscope?
• Which of the following gas is used in Refrigerator for cooling?
• The waves which are used by the TV remote control are:
• Oxygen is supplied from lungs to tissues and organs by
• What divides the Earth into the Northern and the Southern Hemispheres?
• Ozone protects the Earth from harmful _____ radiations from the Sun.
• The chemical formula of “Ozone” is
• Who won the Nobel prize in physics for the discovery of the “Law of photoelectric effect”?
• For a fixed mass of gas at constant temperature, if we decrease volume, the pressure
• The density of water is
• The Sun’s mass is mainly consist of hydrogen. The second main constituent is
• The SI unit of “pressure” is
• The densest substance on the Earth is
• A camera uses a _____ to form an image.
• CNG stands for
• Sound cannot travel through
• What is true about “Sound”?
• When white light passes through a prism, it splits into _____ colours.
• 1 nanometer = _____ meter.
• The instrument used for measuring very high temperature is
• Sound waves are _____ waves.
• The fluid part of blood is known as
• The speed of light is _____ kilometres per second.
• In a very low temperature which from the following will freeze at last?
• The nearest planet to the Earth is
• In general, Comets have _____ orbits.
• GPS is an abbreviation for
• At night, Plants intake _____ and release _____.
• Urine is produced in
• Blood is cleaned by
• The position of an element in the Periodic Table is determined by its _____ number.
• The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in _____ of sea water.
• The planet that is easily visible from the Earth is
• In the solar system, the Great Spot is on the planet
• The “Great Spot” on the planet Jupiter is a
• Ships use _____ to find the depth of the ocean beneath them.
• Molecules with identical molecular formulae but with different structural formulae are called
• The anode is the electrode connected to the _____ terminal of a battery.
• The unit used to measure humidity is
• Laser was invented by
• The vernier caliper is used to measure
• Atomic clock is used to measure ______ intervals of time.
• 1 tonne = _____ kg
• An instrument used to measure atmospheric pressure is
• An instrument used to measure gas pressure is
• Which electromagnetic wave has the longest wavelength?
• Which electromagnetic wave has the shortest wavelength?
• All electromagnetic waves have the same
• The reflection of sound is called
• An instrument used to measure electric current is called
• The SI unit of thermodynamic temperature is
• The shortest distance between crest to crest is called
• The speed of sound is fastest in
• The speed of sound is slowest in
• Radioactivity was discovered by
• Which of the following radiations has the greatest ionizing power?
• Which of the following radiations has the greatest penetrating power?
• Which of the following radiations has the greatest speed?
• The chemical name of chalk is
• The branch of science which study the interaction between matter and radiant energy is called
• The horizontal rows of the periodic table are called
• The vertical columns of the periodic table are called
• Which metallic element is liquid at room temperature?
• Which non-metallic element is liquid at room temperature?
• Battery charger converts electrical energy into _____ energy.
• A loudspeaker changes _____ energy into sound energy.
• The strongest part(s) of a magnet is/are
• Electromagnetic induction was discovered by
• Battery was invented by
• The most abundant form of matter in the universe is
• When gas is ionized, _____ is formed.
• The fact that universe is expanding was discovered by
• X-rays were discovered by
• The Nobel prize in physics for the discovery of the law of photoelectric effect was awarded to
• The symbol of gold is
• Plaster of Paris can be produced by heating
• Which of the following is NOT true about Helium gas?
• The lifespan of Red Blood Cells (RBC) is _____ days.
• The lifespan of White Blood Cells (WBC) is _____ day(s).
• Human body is about _____ water by weight.
• Which component of the body works as an energy storage device?
• Each day human body breathe in _____ liters of air.
• The most abundant element in the universe is
• The most abundant element in the Earth’s crust is
• The average adult has a blood volume of about _____ liters.
• The Sun is a/an
• The position of an element in the Periodic Table is determined by its _____ number.
• Oxidation is a chemical reaction involving the
• The planet that moves round the Sun at the highest speed is
• During winter in cold countries, the _____ is mixed to melt the ice on the icy roads.
• Deficiency of Vitamin-D results in
• About how much energy entering earth’s atmosphere is from the sun?
• What is the most abundant form of matter in the universe?
• Which of the following substance is NOT a conductor?