EVERYDAY SCIENCE MCQ AS ONE LINER
🔶Glycerol is purified by ➡️ Vacuum distillation.
🔶steam distillation technique are used for the separation of ➡️sandalwood oil, aniline, nitrobenzene.
🔶chromatography technique are used for the separation of ➡️ plant pigments, Dye stuffs, isolation.
🔶crystallization technique are used for the separation of ➡️ Mixture of sugar and salt by using ethyl alcohol.
🔶the estimation of age ofvthe carbon bering materials are done by ➡️ Radiocarbon dating.
🔶Age of fossil may be found out by determining the ratio of two isotopes of carbon. The isotopes are ➡️ c12 & c14
🔶the estimation of age of the earth, minerals and rocks are done by ➡️ uranium dating.
🔶why sodium -24 is injected along with salt solution ➡️ the flow of blood.
🔶which radioisotopes used in treatment of thyroid diseases ➡️ Iodine -131
🔶which radioisotopes used for brain imaging ➡️ Iodine -123
🔶which radioisotopes used in treatment of cancer disease ➡️ cobalt -60
🔶which radioisotopes used in treatment of leukemia therapy disease ➡️ phosphorus -32
🔶which radioisotopes used in study the kinetics of photosynthesis ➡️ carbon -14
🔶the acid used in eye wash is ➡️ Boric acid.
🔶what is the main harmful drug found in tobacco ➡️ Nicotine.
🔶where the hydrochloric acid use ➡️ Gastric juices, dying, bathroom cleaner, tanning of leather and drugs etc.
🔶where the nitric acid use ➡️ Fertilizer, dynamite, medicines, drugs and explosive etc.
🔶where the formic acid use ➡️ Insecticides, as a preservation of green fruits and rubber etc.
🔶where the sulphuric acid use ➡️ Petroleum exploration, colours, alum, medicines, detergents, fertilizer and battery etc.
🔶where the oxalic acid use ➡️ Photography, colouration and printing of clothes, removing ink or rust spot from the cloth.
🔶the purest form of water is ➡️ Rain water.
🔶plaster of paris is made of➡️ Gypsum
🔶where the plaster of paris use ➡️ for making toys, for plaster fractured bones, making surfaces smooth etc.
🔶setting of plaster of paris involves ➡️ Hydration to form other hydrates.
🔶where the element required for solar energy conversion ➡️ silicon.
🔶Tungsten is mainly used for making filaments of electric bulbs because of its ➡️ High melting point.
🔶which metal isused in storage batteries ➡️ Lead
🔶the first metal used by man was ➡️ copper
🔶the metal that is present in photo films is ➡️ silver
🔶which element pollutes the air ➡️ Lead
🔶the wire of flash bulb is made of ➡️ magnesium
🔶chocolates can be bad for health because it content high percentage of which element ➡️ Nickel.
🔶potassium permanganate is used for purifying drinking water, because ➡️ it is an oxidising agent.
🔶Helium gas is filled in balloons because ➡️ it is lighter than air.
🔶the gases used in the respiratory activities of sailors (divers) are ➡️ Oxygen and Helium
🔶where the helium gas use ➡️ filling balloons, weather related information and tyres of the aircraft etc.
🔶where the neon gas use ➡️ neon bulbs and fluorescent bulbs etc.
🔶where the Argon gas use ➡️ Arc. Welding and to fill incandescent light bulbs.
🔶where the krypton gas use ➡️ Airport runway and approach light.
🔶where the Xenon gas use ➡️ high intensity, short exposure photographic, flash tubes etc.
🔶where the radon gas use ➡️ for the treatment of cancer (Radiotherapy ).
🔶which material is used to make electric heater coil ➡️ Nichrome.
🔶the material used for electric fuse is an alloy of tin and lead.this alloy should have ➡️ High specific resistance and low melting point.
🔶where the ferric oxide use ➡️ jeweler rough
🔶where the silver nitrate use ➡️ prepare to ink
🔶where the silver iodide use ➡️ Artificial rain
🔶cooking gas contains a mixture of ➡️ methane & ethylene.
🔶the main components of the liquefied petroleum gas (LPG)➡️ methane, propane, butane
🔶which gas is found in maximum quantity in LPG gas cylinder ➡️ Butane
🔶which is a strong is smelling agent added to LPG cylinder to help in the detection of gas leakage ➡️ Ethyl mercaptan or thioethanol
🔶LPG is stored at ➡️ High pressure.
🔶which is better domestic fuel ➡️ LPG
🔶LPG in a domestic gas cylinder is stored in ➡️ Liquid state
🔶which gas is used in the cigarette lighter ➡️ Butane
🔶which fuel causes minimum environmental pollution ➡️ Hydrogen.
🔶Natural gas, petroleum, and coal are ➡️ Fossil fuels.
🔶which is obtained by carbonization of vegetable matter ➡️ coal.
🔶which is used as a filler in rubber tyres ➡️ Carbon black
🔶petroleum is a dark oily liquid also called as ➡️ rock oil, mineral oil, crude oil or black gold.
🔶petroleum consists of a mixture of ➡️ Hydrocarbons
🔶by which we can measure the quality of petrol ➡️ Octane number.
🔶who determines the petroleum price in the world ➡️ OPEC
🔶by which we can measure the quality of diesel ➡️ Cetane number
🔶in firework, the red flame is produced because of ➡️ strontium
🔶in firework, the yellow flame is produced because of ➡️ sodium
🔶in firework, the blue flame is produced because of ➡️ copper
🔶in firework, the green flame is produced because of ➡️ Barium
🔶in firework, the orange flame is produced because of ➡️ calcium
🔶the most common fire extinguisher is ➡️ water
🔶the gas used to extinguish fire isv➡️ carbon dioxide
🔶which type of fire extinguisher is used for petroleum fire➡️ powder type.
🔶the tip of the match stick contains ➡️ mixture of antimony trisulphide & potassium colorate.
🔶the side of match box contains ➡️ mixture of powdered glass and red phosphorus.
🔶which gas is inside an electrical bulb ➡️ Nitrogen
🔶which exide of nitrogen is used in chloroform solution ➡️ Nitrogen pent oxide
🔶which gas is 1.5 times heavier than water ➡️ carbon dioxide.
🔶which gas is essential for photosynthesis process ➡️ carbon dioxide
🔶what are the major pollutants of cigarette smoke ➡️ carbon monoxide & benzene
🔶which compound caused tragedy of Bhopal in 1984➡️ Methyl isocyanate
🔶which water that does not form lather with soap easily is called ➡️ Hard water
🔶Temporary hardness of water is due to the presence of ➡️ sulphates of calcium and magnesium.
🔶permanent hardness of water may be removed by addition of ➡️ sodium carbonate or calgon or zeolite.
🔶Major gaseous pollutant of thermal power station is ➡️ SO2
🔶the depletion of ozone layer is due to ➡️ chlorofluorocarbons
🔶Taj mahal is greatly affected due to ➡️ Acid rain
🔶where is the smog is likely to occur ➡️ Near the industrial areas.
🔶the water pollution in the rivers are measured by ➡️ Amount of dissolved oxygen.
🔶the first organic compounds synthesized in the laboratory is ➡️ urea.
🔶the most abundantly found organic compound in the nature is ➡️ Cellulose
🔶the alcohol is used in the preparation of dynamite is ➡️ Glycerene.
🔶Detergents also called ➡️ soapless soap
🔶the advantage of detergents over soaps is ➡️ Detergents give lather even with hard water
🔶the chief source for the production of nitrogenous fertilizers is ➡️ Ammonia
🔶Raw materials used for the manufacturer of glass are ➡️ sand, soda, limestone
🔶where the flint glass use ➡️ optical instruments (like lens of camera, prisms, microscope, telescope etc.)
🔶where the crown glass use ➡️ Optical instruments.
🔶where the jena glass use ➡️ Bottles for keeping acids and alkalies in laboratory.
🔶where the crook's glass use ➡️ Eye lenses used in different eye defects and spectacles as it absorbs uv rays.
🔶which type of glass used in making bulletproof material ➡️ Glass laminates
🔶which type of glass is used for making glass reinforced plastic ➡️ Fibre glass
🔶cement os usually a mixture of ➡️ calcium silicate & calcium aluminate
🔶 cement is formed by strongly heating a mixture of ➡️ Limestone & clay.
🔶Non stick cooking utensil are coated with ➡️ Teflon.
🔶the name of plastic polymer from which combs, toys, bowls etc. Can be made is ➡️ polystyrene.
🔶which polymeric materials is used for making bulletproof jackets ➡️ Kevlar
🔶which synthesis fiber is known as artificial silk ➡️ Rayon.
🔶the first synthetic fiber made by man was ➡️ Nylon
🔶in vulcanization, natural rubber is heated with ➡️ sulphur
🔶the substance that is added to make natural rubber strong and more bouncy is ➡️ sulphur
🔶if the rubber vulcanized with 5% sulphur, it is used for ➡️ making tyres
🔶if the rubber vulcanized with 30% sulphur, it is used for ➡️ making battery cases
🔶Rubber is coagulated from latex by adding ➡️ Acetic acid
🔶why analgesic medicines is used ➡️ to reduce
Pain.
🔶Acetyl salicylic acid is commonly used as which medicine ➡️ pain killer
🔶examples of analgesics medicines are ➡️ Aspirin, paracetamol, morphine.
🔶why antipyretics medicines is used ➡️ to reduce body temperature during high fever.
🔶example of antipyretics medicines are ➡️ aspirin, paracetamol, phenacetin, analgin, novalgin.
🔶dettol is a mixture of➡️ chloroxylenol and a-terpineol
🔶the antiseptic compound present in dettol➡️ chloroxylenol
🔶the part of cinchona plant which yields quinine is ➡️ Bark
🔶an iron ball and a wooden ball of the same radius are released from the same height in a vacuum. The time taken by both of the these to reach the ground is ➡️ exactly equal.
🔶a bullet fired from a gun making an angle of 45° with the earth's surface follows a ➡️ parabola path.
🔶the gravitational force of attraction between the sun and earth is balanced by➡️ centripetal force.
🔶fat can be separated from milk in a cream separator because of ➡️ centrifugal force.
🔶the working principal of a washing machine is ➡️ centrifugal force.
🔶when a running car stop suddenly, the passengers tendbto lean forward because of ➡️ inertia of motion.
🔶Dusting of a blanket employs which scientific principal ➡️ moment of inertia.
🔶if a bus takes a sharp turn then passengers inside move outward due to ➡️ inertia
🔶a rocket and jet engine works on the principal of conservation of ➡️ Linear momentum
🔶when a man jumps a boat to the shore, the boat slightly moves away from the shore due to ➡️ conservation of linear momentum.
🔶when a bullet is fired fromva gun recoils or gives a sharp pull in backward direction due to ➡️conservation of linear momentum.
🔶why a cricket player draws his hand back while catching ➡️ Due to impulse
🔶why bogies of a train are provided with buffers ➡️ Due to impulse.
🔶why vehicles like car, buses and scooter are provided with shockers ➡️ Due to impulse
🔶when a cricketer lowers his hand while catching the ball, its saves him from injury ➡️due to impulse force.
🔶Ball bearings are used in cycles, scooters etc. To ➡️ Reduce the friction between the wheel and the axle.
🔶when a body falls from an aeroplane, increasing its ➡️ Kinetic energy.
🔶a flying aeroplane possesses of ➡️ both kinetic &potential energy.
🔶The dynamo is a device for converting ➡️ mechanical energy into electrical energy
🔶The electric motor is a device for converting ➡️ electrical energy into mechanical energy.
🔶the solar cell is a device for converting ➡️ solar energy into electrical energy.
🔶the microphone is a device for converting
➡️ sound energy into electrical energy.
🔶the loudspeaker is a device for converting ➡️ electrical energy into sound energy.
🔶the musical instrument is a device for converting ➡️ mechanical energy into sound energy.
🔶candle converts ➡️ chemical energy into light energy and thermal energy.
🔶the electric cell(Battery ) is a device for converting ➡️ chemical energy into electrical energy.
🔶coal converts ➡️ chemical energy into thermal energy
🔶Heat engine converts ➡️ heat energy into mechanical energy.
🔶the electrical bulb is a device for converting ➡️ electrical energy into light energy.
🔶in which process light energy is converted into chemical energy ➡️ photosynthesis.
🔶the value of the g at the center of the earth is ➡️ zero.
🔶when we go above the surface of the earth, the acceleration due to gravity goes on ➡️ decrease
🔶when we go below the surface of the earth, the acceleration due to gravity goes on ➡️ decrease
🔶the intensity of the earth's gravitational field is maximum at ➡️ the pole
🔶the intensity of the earth's gravitational field is minimum at ➡️ the equator.
🔶if we move from the equator to a pole, the value of g➡️ increase
🔶if we move from the pole to equator, the value of g➡️ decrease.
🔶the rate of rotation of earth decrease, then the value of g ➡️ increase.
🔶the rate of rotation of earth increase, then the value of g ➡️ decrease.
🔶when a stone piece is brought from the moon's surface to the earth then ➡️ its weight wiil change but its mass would remain constant.
🔶which is the world's first man made satellite ➡️ sputnik
🔶india's first artificial satellite Aryabhata was launched from ➡️ soviet union in 1975.
🔶the weight of an object in a satellite orbiting around the earth is ➡️ zero
🔶a man inside of an artificial satellite feels weightlessness because the force of attraction due to the earth is ➡️ Equal to the centripetal force.
🔶Geostationary satellite are used for ➡️ reflected tv signals and telecast tv programs from one part of the world to another.
🔶which satellite helps to telecast tv network all over india ➡️ INSAT - IB
🔶polar satellite are used for ➡️ weather forecasting.
🔶in how many hours does polar satellite complete its one revolution around the earth ➡️ 84 minutes.
🔶in how many hours does Geostationary satellite complete its one revolution around the earth ➡️ 24 hours.
🔶when satellite launched which velocity needed ➡️ Escape velocity.
🔶if lift is stationary or moving upward and downward with uniform speed ➡️ the weight of a body is equal to its true weight.
🔶A apparent weights of a person sitting in a lift is more than its real weight when the lift moves ➡️ Accelerating upward.
🔶A apparent weights of a person sitting in a lift is less than its real weight when the lift moves ➡️ Accelerating downward.
🔶a person weights zero in a lift, which is ➡️ the cord of the lift broken.
🔶which instrument is used for the measurement of atmospheric pressure ➡️ Barometer.
🔶the sudden fall of the reading barometer indicates that the weather is ➡️ storm
🔶the slow fall of the reading barometer indicates that the weather is ➡️ Rain
🔶the slow rise of the reading barometer indicates that the weather is ➡️ clear.
🔶in summer, sometimes the bicycle tube bursts inside the tube because ➡️ the pressure of the air increases.
🔶the fountain pen of a passenger leaks in aeroplane at height because ➡️ low atmospheric pressure.
🔶in high mountainous region bleeding through nose because ➡️ the pressure of the blood in the capillaries is higher than the outside air pressure.
🔶the inside pressure of a soap bubble is ➡️ more than the atmospheric pressure.
🔶the operating principal of a hydraulic press, hydraulic lift and hydraulic brake is ➡️ pascal's law.
🔶when some detergent is added to water, the surface tension ➡️ decrease
🔶Raindrops are spherical due to ➡️ surface tension
🔶Floatation of needle on water due to ➡️ surface tension
🔶Dancing of camphor on water due to ➡️ surface tension
🔶oil spreads over the surface of water because ➡️ oil has less surface tension than water.
🔶The absorption of ink by blotting paper involves ➡️ capillarity action phenomenon.
🔶the rise of kerosene oil in wicks of lamps is due to which property of liquids ➡️ capillary action.
🔶melted wax in a candle rises up to wick by ➡️ capillary action.
🔶the root hairs of plants draw water from the soil through ➡️ capillary action.
🔶Action of towel in soaking up water from the body is due to➡️ capillary action of cotton in the towel.
🔶it is easier to swim in a sea water than in ordinary water because ➡️ Density of sea water is higher than that of ordinary water.
🔶a ship rises as it entres the sea from a river because the ➡️ Density of sea water is higher than of ordinary water.
🔶when cream is separated from milk the density of milk ➡️ increases
🔶Ice floats on water surface because ➡️ Density of ice is lesser than the density of water.
🔶a piece of ice is dropped in a glass of water, after melting of ice the level of water is ➡️ does not change.
🔶when a liquid flow through a pipe, its speed is maximum near ➡️ axis of pipe.
🔶when a liquid flow through a pipe, its speed is minimum near ➡️ walls of pipe.
🔶An ordinary pendulum clock runs faster in winter but slower in summer, because ➡️ the length of pendulum increase in summer but the length of pendulum decreases in winter.
🔶The time period of a simple pendulum at the center of earth is ➡️ infinite
🔶At moon the time period of simple pendulum increases because ➡️ Gravity at moon is very less.
🔶sound wave is an example of ➡️ Longitudinal mechanical waves.
🔶the sound having a frequency of 20 Hertz to 20000 Hertz are known as ➡️ Audible or sound waves.
🔶the velocity of less than 20 Hertz is known as➡️ Infrasonic waves.
🔶 the infrasonic waves produced by ➡️ Earthquake, volcanic, eruption, ocean waves, elephants and whales.
🔶 the vvelocity of more than 20000 Hertz is known as➡️ ultrasonic waves.
🔶the ultrasonic waves are used for ➡️ sending signal, measuring the depth of sea, cleaning clothes & in ultrasonography.
🔶Bats can fly in the dark, because ➡️ They are guided by ultrasonic waves produced by them.
🔶at what temperature both celsius and fahrenheit scales equal ➡️ -40°
🔶Mercury is commonly used as a thermometric fluid rather than water because ➡️ Mercury has greater visibility than water.
🔶Temperature of the sun is measured with ➡️ Pyrometer.
🔶which of the substance has greatest specific heat ➡️ water
🔶which of the substance has lowest specific heat ➡️ Mercury.
🔶Clear nights are colder than cloudy nights because of ➡️ radiation
🔶Heat from the sun reaches the earth by ➡️ Radiation.
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🔶Glycerol is purified by ➡️ Vacuum distillation.
🔶steam distillation technique are used for the separation of ➡️sandalwood oil, aniline, nitrobenzene.
🔶chromatography technique are used for the separation of ➡️ plant pigments, Dye stuffs, isolation.
🔶crystallization technique are used for the separation of ➡️ Mixture of sugar and salt by using ethyl alcohol.
🔶the estimation of age ofvthe carbon bering materials are done by ➡️ Radiocarbon dating.
🔶Age of fossil may be found out by determining the ratio of two isotopes of carbon. The isotopes are ➡️ c12 & c14
🔶the estimation of age of the earth, minerals and rocks are done by ➡️ uranium dating.
🔶why sodium -24 is injected along with salt solution ➡️ the flow of blood.
🔶which radioisotopes used in treatment of thyroid diseases ➡️ Iodine -131
🔶which radioisotopes used for brain imaging ➡️ Iodine -123
🔶which radioisotopes used in treatment of cancer disease ➡️ cobalt -60
🔶which radioisotopes used in treatment of leukemia therapy disease ➡️ phosphorus -32
🔶which radioisotopes used in study the kinetics of photosynthesis ➡️ carbon -14
🔶the acid used in eye wash is ➡️ Boric acid.
🔶what is the main harmful drug found in tobacco ➡️ Nicotine.
🔶where the hydrochloric acid use ➡️ Gastric juices, dying, bathroom cleaner, tanning of leather and drugs etc.
🔶where the nitric acid use ➡️ Fertilizer, dynamite, medicines, drugs and explosive etc.
🔶where the formic acid use ➡️ Insecticides, as a preservation of green fruits and rubber etc.
🔶where the sulphuric acid use ➡️ Petroleum exploration, colours, alum, medicines, detergents, fertilizer and battery etc.
🔶where the oxalic acid use ➡️ Photography, colouration and printing of clothes, removing ink or rust spot from the cloth.
🔶the purest form of water is ➡️ Rain water.
🔶plaster of paris is made of➡️ Gypsum
🔶where the plaster of paris use ➡️ for making toys, for plaster fractured bones, making surfaces smooth etc.
🔶setting of plaster of paris involves ➡️ Hydration to form other hydrates.
🔶where the element required for solar energy conversion ➡️ silicon.
🔶Tungsten is mainly used for making filaments of electric bulbs because of its ➡️ High melting point.
🔶which metal isused in storage batteries ➡️ Lead
🔶the first metal used by man was ➡️ copper
🔶the metal that is present in photo films is ➡️ silver
🔶which element pollutes the air ➡️ Lead
🔶the wire of flash bulb is made of ➡️ magnesium
🔶chocolates can be bad for health because it content high percentage of which element ➡️ Nickel.
🔶potassium permanganate is used for purifying drinking water, because ➡️ it is an oxidising agent.
🔶Helium gas is filled in balloons because ➡️ it is lighter than air.
🔶the gases used in the respiratory activities of sailors (divers) are ➡️ Oxygen and Helium
🔶where the helium gas use ➡️ filling balloons, weather related information and tyres of the aircraft etc.
🔶where the neon gas use ➡️ neon bulbs and fluorescent bulbs etc.
🔶where the Argon gas use ➡️ Arc. Welding and to fill incandescent light bulbs.
🔶where the krypton gas use ➡️ Airport runway and approach light.
🔶where the Xenon gas use ➡️ high intensity, short exposure photographic, flash tubes etc.
🔶where the radon gas use ➡️ for the treatment of cancer (Radiotherapy ).
🔶which material is used to make electric heater coil ➡️ Nichrome.
🔶the material used for electric fuse is an alloy of tin and lead.this alloy should have ➡️ High specific resistance and low melting point.
🔶where the ferric oxide use ➡️ jeweler rough
🔶where the silver nitrate use ➡️ prepare to ink
🔶where the silver iodide use ➡️ Artificial rain
🔶cooking gas contains a mixture of ➡️ methane & ethylene.
🔶the main components of the liquefied petroleum gas (LPG)➡️ methane, propane, butane
🔶which gas is found in maximum quantity in LPG gas cylinder ➡️ Butane
🔶which is a strong is smelling agent added to LPG cylinder to help in the detection of gas leakage ➡️ Ethyl mercaptan or thioethanol
🔶LPG is stored at ➡️ High pressure.
🔶which is better domestic fuel ➡️ LPG
🔶LPG in a domestic gas cylinder is stored in ➡️ Liquid state
🔶which gas is used in the cigarette lighter ➡️ Butane
🔶which fuel causes minimum environmental pollution ➡️ Hydrogen.
🔶Natural gas, petroleum, and coal are ➡️ Fossil fuels.
🔶which is obtained by carbonization of vegetable matter ➡️ coal.
🔶which is used as a filler in rubber tyres ➡️ Carbon black
🔶petroleum is a dark oily liquid also called as ➡️ rock oil, mineral oil, crude oil or black gold.
🔶petroleum consists of a mixture of ➡️ Hydrocarbons
🔶by which we can measure the quality of petrol ➡️ Octane number.
🔶who determines the petroleum price in the world ➡️ OPEC
🔶by which we can measure the quality of diesel ➡️ Cetane number
🔶in firework, the red flame is produced because of ➡️ strontium
🔶in firework, the yellow flame is produced because of ➡️ sodium
🔶in firework, the blue flame is produced because of ➡️ copper
🔶in firework, the green flame is produced because of ➡️ Barium
🔶in firework, the orange flame is produced because of ➡️ calcium
🔶the most common fire extinguisher is ➡️ water
🔶the gas used to extinguish fire isv➡️ carbon dioxide
🔶which type of fire extinguisher is used for petroleum fire➡️ powder type.
🔶the tip of the match stick contains ➡️ mixture of antimony trisulphide & potassium colorate.
🔶the side of match box contains ➡️ mixture of powdered glass and red phosphorus.
🔶which gas is inside an electrical bulb ➡️ Nitrogen
🔶which exide of nitrogen is used in chloroform solution ➡️ Nitrogen pent oxide
🔶which gas is 1.5 times heavier than water ➡️ carbon dioxide.
🔶which gas is essential for photosynthesis process ➡️ carbon dioxide
🔶what are the major pollutants of cigarette smoke ➡️ carbon monoxide & benzene
🔶which compound caused tragedy of Bhopal in 1984➡️ Methyl isocyanate
🔶which water that does not form lather with soap easily is called ➡️ Hard water
🔶Temporary hardness of water is due to the presence of ➡️ sulphates of calcium and magnesium.
🔶permanent hardness of water may be removed by addition of ➡️ sodium carbonate or calgon or zeolite.
🔶Major gaseous pollutant of thermal power station is ➡️ SO2
🔶the depletion of ozone layer is due to ➡️ chlorofluorocarbons
🔶Taj mahal is greatly affected due to ➡️ Acid rain
🔶where is the smog is likely to occur ➡️ Near the industrial areas.
🔶the water pollution in the rivers are measured by ➡️ Amount of dissolved oxygen.
🔶the first organic compounds synthesized in the laboratory is ➡️ urea.
🔶the most abundantly found organic compound in the nature is ➡️ Cellulose
🔶the alcohol is used in the preparation of dynamite is ➡️ Glycerene.
🔶Detergents also called ➡️ soapless soap
🔶the advantage of detergents over soaps is ➡️ Detergents give lather even with hard water
🔶the chief source for the production of nitrogenous fertilizers is ➡️ Ammonia
🔶Raw materials used for the manufacturer of glass are ➡️ sand, soda, limestone
🔶where the flint glass use ➡️ optical instruments (like lens of camera, prisms, microscope, telescope etc.)
🔶where the crown glass use ➡️ Optical instruments.
🔶where the jena glass use ➡️ Bottles for keeping acids and alkalies in laboratory.
🔶where the crook's glass use ➡️ Eye lenses used in different eye defects and spectacles as it absorbs uv rays.
🔶which type of glass used in making bulletproof material ➡️ Glass laminates
🔶which type of glass is used for making glass reinforced plastic ➡️ Fibre glass
🔶cement os usually a mixture of ➡️ calcium silicate & calcium aluminate
🔶 cement is formed by strongly heating a mixture of ➡️ Limestone & clay.
🔶Non stick cooking utensil are coated with ➡️ Teflon.
🔶the name of plastic polymer from which combs, toys, bowls etc. Can be made is ➡️ polystyrene.
🔶which polymeric materials is used for making bulletproof jackets ➡️ Kevlar
🔶which synthesis fiber is known as artificial silk ➡️ Rayon.
🔶the first synthetic fiber made by man was ➡️ Nylon
🔶in vulcanization, natural rubber is heated with ➡️ sulphur
🔶the substance that is added to make natural rubber strong and more bouncy is ➡️ sulphur
🔶if the rubber vulcanized with 5% sulphur, it is used for ➡️ making tyres
🔶if the rubber vulcanized with 30% sulphur, it is used for ➡️ making battery cases
🔶Rubber is coagulated from latex by adding ➡️ Acetic acid
🔶why analgesic medicines is used ➡️ to reduce
Pain.
🔶Acetyl salicylic acid is commonly used as which medicine ➡️ pain killer
🔶examples of analgesics medicines are ➡️ Aspirin, paracetamol, morphine.
🔶why antipyretics medicines is used ➡️ to reduce body temperature during high fever.
🔶example of antipyretics medicines are ➡️ aspirin, paracetamol, phenacetin, analgin, novalgin.
🔶dettol is a mixture of➡️ chloroxylenol and a-terpineol
🔶the antiseptic compound present in dettol➡️ chloroxylenol
🔶the part of cinchona plant which yields quinine is ➡️ Bark
🔶an iron ball and a wooden ball of the same radius are released from the same height in a vacuum. The time taken by both of the these to reach the ground is ➡️ exactly equal.
🔶a bullet fired from a gun making an angle of 45° with the earth's surface follows a ➡️ parabola path.
🔶the gravitational force of attraction between the sun and earth is balanced by➡️ centripetal force.
🔶fat can be separated from milk in a cream separator because of ➡️ centrifugal force.
🔶the working principal of a washing machine is ➡️ centrifugal force.
🔶when a running car stop suddenly, the passengers tendbto lean forward because of ➡️ inertia of motion.
🔶Dusting of a blanket employs which scientific principal ➡️ moment of inertia.
🔶if a bus takes a sharp turn then passengers inside move outward due to ➡️ inertia
🔶a rocket and jet engine works on the principal of conservation of ➡️ Linear momentum
🔶when a man jumps a boat to the shore, the boat slightly moves away from the shore due to ➡️ conservation of linear momentum.
🔶when a bullet is fired fromva gun recoils or gives a sharp pull in backward direction due to ➡️conservation of linear momentum.
🔶why a cricket player draws his hand back while catching ➡️ Due to impulse
🔶why bogies of a train are provided with buffers ➡️ Due to impulse.
🔶why vehicles like car, buses and scooter are provided with shockers ➡️ Due to impulse
🔶when a cricketer lowers his hand while catching the ball, its saves him from injury ➡️due to impulse force.
🔶Ball bearings are used in cycles, scooters etc. To ➡️ Reduce the friction between the wheel and the axle.
🔶when a body falls from an aeroplane, increasing its ➡️ Kinetic energy.
🔶a flying aeroplane possesses of ➡️ both kinetic &potential energy.
🔶The dynamo is a device for converting ➡️ mechanical energy into electrical energy
🔶The electric motor is a device for converting ➡️ electrical energy into mechanical energy.
🔶the solar cell is a device for converting ➡️ solar energy into electrical energy.
🔶the microphone is a device for converting
➡️ sound energy into electrical energy.
🔶the loudspeaker is a device for converting ➡️ electrical energy into sound energy.
🔶the musical instrument is a device for converting ➡️ mechanical energy into sound energy.
🔶candle converts ➡️ chemical energy into light energy and thermal energy.
🔶the electric cell(Battery ) is a device for converting ➡️ chemical energy into electrical energy.
🔶coal converts ➡️ chemical energy into thermal energy
🔶Heat engine converts ➡️ heat energy into mechanical energy.
🔶the electrical bulb is a device for converting ➡️ electrical energy into light energy.
🔶in which process light energy is converted into chemical energy ➡️ photosynthesis.
🔶the value of the g at the center of the earth is ➡️ zero.
🔶when we go above the surface of the earth, the acceleration due to gravity goes on ➡️ decrease
🔶when we go below the surface of the earth, the acceleration due to gravity goes on ➡️ decrease
🔶the intensity of the earth's gravitational field is maximum at ➡️ the pole
🔶the intensity of the earth's gravitational field is minimum at ➡️ the equator.
🔶if we move from the equator to a pole, the value of g➡️ increase
🔶if we move from the pole to equator, the value of g➡️ decrease.
🔶the rate of rotation of earth decrease, then the value of g ➡️ increase.
🔶the rate of rotation of earth increase, then the value of g ➡️ decrease.
🔶when a stone piece is brought from the moon's surface to the earth then ➡️ its weight wiil change but its mass would remain constant.
🔶which is the world's first man made satellite ➡️ sputnik
🔶india's first artificial satellite Aryabhata was launched from ➡️ soviet union in 1975.
🔶the weight of an object in a satellite orbiting around the earth is ➡️ zero
🔶a man inside of an artificial satellite feels weightlessness because the force of attraction due to the earth is ➡️ Equal to the centripetal force.
🔶Geostationary satellite are used for ➡️ reflected tv signals and telecast tv programs from one part of the world to another.
🔶which satellite helps to telecast tv network all over india ➡️ INSAT - IB
🔶polar satellite are used for ➡️ weather forecasting.
🔶in how many hours does polar satellite complete its one revolution around the earth ➡️ 84 minutes.
🔶in how many hours does Geostationary satellite complete its one revolution around the earth ➡️ 24 hours.
🔶when satellite launched which velocity needed ➡️ Escape velocity.
🔶if lift is stationary or moving upward and downward with uniform speed ➡️ the weight of a body is equal to its true weight.
🔶A apparent weights of a person sitting in a lift is more than its real weight when the lift moves ➡️ Accelerating upward.
🔶A apparent weights of a person sitting in a lift is less than its real weight when the lift moves ➡️ Accelerating downward.
🔶a person weights zero in a lift, which is ➡️ the cord of the lift broken.
🔶which instrument is used for the measurement of atmospheric pressure ➡️ Barometer.
🔶the sudden fall of the reading barometer indicates that the weather is ➡️ storm
🔶the slow fall of the reading barometer indicates that the weather is ➡️ Rain
🔶the slow rise of the reading barometer indicates that the weather is ➡️ clear.
🔶in summer, sometimes the bicycle tube bursts inside the tube because ➡️ the pressure of the air increases.
🔶the fountain pen of a passenger leaks in aeroplane at height because ➡️ low atmospheric pressure.
🔶in high mountainous region bleeding through nose because ➡️ the pressure of the blood in the capillaries is higher than the outside air pressure.
🔶the inside pressure of a soap bubble is ➡️ more than the atmospheric pressure.
🔶the operating principal of a hydraulic press, hydraulic lift and hydraulic brake is ➡️ pascal's law.
🔶when some detergent is added to water, the surface tension ➡️ decrease
🔶Raindrops are spherical due to ➡️ surface tension
🔶Floatation of needle on water due to ➡️ surface tension
🔶Dancing of camphor on water due to ➡️ surface tension
🔶oil spreads over the surface of water because ➡️ oil has less surface tension than water.
🔶The absorption of ink by blotting paper involves ➡️ capillarity action phenomenon.
🔶the rise of kerosene oil in wicks of lamps is due to which property of liquids ➡️ capillary action.
🔶melted wax in a candle rises up to wick by ➡️ capillary action.
🔶the root hairs of plants draw water from the soil through ➡️ capillary action.
🔶Action of towel in soaking up water from the body is due to➡️ capillary action of cotton in the towel.
🔶it is easier to swim in a sea water than in ordinary water because ➡️ Density of sea water is higher than that of ordinary water.
🔶a ship rises as it entres the sea from a river because the ➡️ Density of sea water is higher than of ordinary water.
🔶when cream is separated from milk the density of milk ➡️ increases
🔶Ice floats on water surface because ➡️ Density of ice is lesser than the density of water.
🔶a piece of ice is dropped in a glass of water, after melting of ice the level of water is ➡️ does not change.
🔶when a liquid flow through a pipe, its speed is maximum near ➡️ axis of pipe.
🔶when a liquid flow through a pipe, its speed is minimum near ➡️ walls of pipe.
🔶An ordinary pendulum clock runs faster in winter but slower in summer, because ➡️ the length of pendulum increase in summer but the length of pendulum decreases in winter.
🔶The time period of a simple pendulum at the center of earth is ➡️ infinite
🔶At moon the time period of simple pendulum increases because ➡️ Gravity at moon is very less.
🔶sound wave is an example of ➡️ Longitudinal mechanical waves.
🔶the sound having a frequency of 20 Hertz to 20000 Hertz are known as ➡️ Audible or sound waves.
🔶the velocity of less than 20 Hertz is known as➡️ Infrasonic waves.
🔶 the infrasonic waves produced by ➡️ Earthquake, volcanic, eruption, ocean waves, elephants and whales.
🔶 the vvelocity of more than 20000 Hertz is known as➡️ ultrasonic waves.
🔶the ultrasonic waves are used for ➡️ sending signal, measuring the depth of sea, cleaning clothes & in ultrasonography.
🔶Bats can fly in the dark, because ➡️ They are guided by ultrasonic waves produced by them.
🔶at what temperature both celsius and fahrenheit scales equal ➡️ -40°
🔶Mercury is commonly used as a thermometric fluid rather than water because ➡️ Mercury has greater visibility than water.
🔶Temperature of the sun is measured with ➡️ Pyrometer.
🔶which of the substance has greatest specific heat ➡️ water
🔶which of the substance has lowest specific heat ➡️ Mercury.
🔶Clear nights are colder than cloudy nights because of ➡️ radiation
🔶Heat from the sun reaches the earth by ➡️ Radiation.
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