Set-3 Flashcards
When a person enters a dark room from bright light he is not able to see clearly for a little while because the?
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A. Eye is unable to adjust itself immediately
B. Retina becomes insensitive momentarily
C. Iris is unable to dilate the pupil immediately
D. Distance between the lens and retina take time to adjust
C. Iris is unable to dilate the pupil immediately
What is the average adult pulse rate?
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A. 140-150
B. 115-125
C. 72-80
D. 60
C. 72-80
The beautiful color patterns exhibited by a peacock in its tail feathers are due to ?
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A. Selective absorption of light
B. Selective re ection of light
C. Sinterference of light
D. Natural colour pattern of feathers
A. Selective absorption of light
A lake starts freezing because of the cold atmosphere. It will first freeze
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A. At the bottom
B. ln the middle pan
C. At the top surface
D. Uniformly throughout the water body
C. At the top surface
The sun appears red at sunrise and sunset while it appears white at noon, because
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A. Of refraction
B. It is cooler at sunrise and at sunset
C. Of diffraction leading to red end of the spectrum reaching the earth.
D. Of Scattering of light due to dust particles and air molecules.
D. Of Scattering of light due to dust particles and air molecules.
An astronaut inside a spacecraft is in a state of weightlessness. This implies that?
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A. The mass of the astronaut is reduced to zero
B. Gravity inside the spacecraft ceases to act
C. The astronaut is outside the influence of the earth’s gravitational force
D. The astronaut and the spacecraft are both in a free-failing state
D. The astronaut and the spacecraft are both in a free-failing state
An astronaut in a spacecraft is in a state of weightlessness because both the astronaut and the spacecraft are in a state of free fall. This means that the only force acting on them is gravity, and they are both accelerating at the same rate. As a result, the astronaut does not feel the force of gravity, and they experience a feeling of weightlessness.
An iceberg is floating in sea. How much of its mass will remain above the surface of water?
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A. One tenth
B. One fifth
C. One fourth
D. One third
A. One tenth
Most of the ozone in the atmosphere is concentrated in the _____________?
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A. Mesosphere
B. Troposphere
C. Stratosphere
D. ionosphere
C. Stratosphere
The cow’s milk contains how much amount of water in terms of percentage?
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A. 60%
B. 65%
C. 72%
D. 80%
D. 80%
T.V. transmission cannot cover a very large area because
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A. the strength of T.V. waves is very limited
B. picture cannot be transmitted clearly after a specific distance
C. the shape of the earth is spherical
D. the air is not a good conductor of light and sound/waves
C. the shape of the earth is spherical
The Green House Effect is caused by an excess of ?
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A. Carbon dioxide
B. Carbon monoxide
C. Carbon tetrachloride
D. None of the above
A. Carbon dioxide
Bats can also fly in dark because they are capable of taking the help of _________?
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A. Ultraviolet Waves
B. Ultrasonic Waves
C. Electromagnetic Waves
D. Special Retina
B. Ultrasonic Waves
What is ‘Stealth Technology‘?
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A. A device which when attached to an aircraft makes it invisible on the radar
B. A coating which reduces the visibility of an aircraft on radar
C. A Technology by which it is possible for the aircraft’s to spy in the enemy air-space
D. A technology by using which paratroopers can be dropped stealthily behind the enemy columns.
B. A coating which reduces the visibility of an aircraft on radar
The primary function of the feathers in birds is to _________?
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A. Provide insulation for preserving body heat
B. Provide striking surface to the wings for flying
C. Make the body surface waterproof
D. impart coloration for species as well as sex recognition
B. Provide striking surface to the wings for flying
The rear view mirror of a motor vehicle is ________?
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A. Concave
B. Plane
C. Convex
D. Biconcave
C. Convex
Lead ball falls through water more slowly than through air because __________?
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A. The value of ‘g’ is less in water
B. Density of air is less than that of water
C. Of the viscous force in water
D. Of The surface tension of water
C. Of the viscous force in water
A Fahrenheit thermometer indicates a temperature of ‘ 14°F. its corresponding reading on the Celsius scale will be _________?
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A. – 2O°C
B. – 10°C
C. + 10°C
D. + 20°C
B. – 10°C
Which one of the following sets of color combinations is added in color vision in TV’?
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A. Red, green and blue
B. Orange, back and violet
C. White. red and yellow
D. Yellow, green and blue
A. Red, green and blue
A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to __________?
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A. Remain unaffected
B. Fall away from the train
C. Fall towards the train
D. Fall away from or towards the train depending upon the speed
C. Fall towards the train
Water is a highly effective coolant for a car engine because _________?
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A. Water is good conductor of heat
B. Water has very high specific heat capacity
C. Water boils at a comparatively high temperature
D. Evaporation of water produces lot of cooling
B. Water has very high specific heat capacity
Scalding with steam is more severe than scalding by boiling water because_______?
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A. Steam can penetrate the skin
B. Steam is at a higher temperature
C. Steam contains more energy than boiling water
D. Steam is at a higher pressure
C. Steam contains more energy than boiling water
In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as____________?
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A. Electroplating
B. Annealing
C. Galvanization
D. Vulcanization
C. Galvanization
The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?
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A. The hair barging against the charged comb
B. Small electric sparks
C. The rubbing of the comb with the hair
D. None of the above
B. Small electric sparks
Detergents dissolved in water help in cleaning clothes by_________?
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A. Increasing the temperature of water
B. Reacting chemically with dirt
C. Reducing the surface tension of water
D. Dissolving dirt
C. Reducing the surface tension of water
The absorption of ink by blotting paper involves__________?
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A. Viscosity of ink
B. Capillary action phenomenon
C. Diffusion of ink through the blotting
D. Siphon action
B. Capillary action phenomenon
Materials for rain-proof coats and tents owe their water proof properties to________?
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A. Surface tension
B. Viscosity
C. Specific gravity
D. Elasticity
A. Surface tension
A satellite moving round the earth with a uniform speed has____________?
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A. An accelerated motion
B. No acceleration at all
C. Uniform acceleration
D. Uneven acceleration
C. Uniform acceleration
For being able to see three-dimensional pictures we have to use_________?
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A. A binocular
B. A camera
C. An epidiascope
D. A stereoscope
D. A stereoscope
A stereoscope is a device that allows us to see three-dimensional images. It does this by presenting two slightly different images to each eye. Our brains then combine these images to create the illusion of depth.
Binoculars are used to see objects that are far away, but they do not create the illusion of depth. A camera is used to take pictures, but it does not allow us to see three-dimensional images. An epidiascope is a device that projects images onto a screen, but it does not create the illusion of depth.
Water has maximum density at____________?
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A. 0°C
B. 4°C
C. 4° K
D. 4.8°C
B. 4°C
The theory of Expanding Universe was first propounded by____________?
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A. Einstein
B. Newton
C. Gahleo
D. Hubble
D. Hubble
Edwin Hubble was an American astronomer who made the first observations that showed that the universe is expanding. In 1929, he published a paper that showed that the light from distant galaxies was shifted to the red end of the spectrum. This shift, called redshift, is caused by the expansion of the universe. Hubble’s discovery showed that the universe is not static, as had been thought previously, but is instead expanding.
Hubble’s discovery has had a profound impact on our understanding of the universe. It has led to the development of the Big Bang theory, which is the current prevailing model for the evolution of the universe. The Big Bang theory states that the universe began with a very hot, dense state and has been expanding and cooling ever since. Hubble’s discovery is one of the most important observations in the history of astronomy.
An instrument to detect the purity of milk is____________?
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A. Lactometer
B. Hygrometer
C. Manometer
D. Sonometer
A. Lactometer
Coulomb is the scientific unit to measure?
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A. Velocity
B. Temperature
C. Mass
D. None OF These
D. None OF These
The correct answer is D. None of these.
A coulomb is the International System of Units (SI) unit of electric charge. It is the charge (symbol: Q or q) transported by a constant current of one ampere in one second. It is named after Charles-Augustin de Coulomb. One coulomb is equal to the charge of approximately 6.241509×1018 protons.
Velocity is measured in meters per second. Temperature is measured in degrees Celsius, Fahrenheit, or Kelvin. Mass is measured in kilograms.
Who proposed this concept “All motion is relative”?
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A. Albert Einstein
B. John Kepler
C. Galileo Galilie
D. None
A. Albert Einstein
The field of specialization of famous Muslim scientist Abu Usman Aljahiz was?
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A. Botany
B. Zoology
C. Astronomy
D. None
B. Zoology
Albatros is__________?
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A. A sea bird
B. A beetle
C. A fruit
D. None
A. A sea bird
If you describe something or someone as an albatross around your neck, you mean that they cause you great problems from which you cannot escape, or they prevent you from doing what you want to do.
The sunlight can reach a depth of___________meters in the ocean
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A. 80
B. 200
C. 120
D. None
B. 200
The biggest planet in our solar system is___________?
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A. Venus
B. Pluto
C. Jupiter
D. None
C. Jupiter
The biggest species of the cat family is___________?
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A. Tiger
B. Lion
C. Leopard
D. None
A. Tiger
Which group of animals has heterogametic females?
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A. Domestic fowl
B. Earthworm
C. Rabbit
D. None
B. Earthworm
The dominant phase of life cycle in these organism is haploid?
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A. Mosses
B. Bacteria
C. Protozoa
D. None
A. Mosses
Mosses are a type of plant that have a haploid dominant life cycle. This means that the majority of the moss plant is haploid, with only the zygote being diploid. The haploid phase of the moss life cycle begins with the germination of a spore. The spore develops into a gametophyte, which is the haploid plant. The gametophyte produces gametes, which are haploid sex cells. The gametes fuse to form a zygote, which is the only diploid cell in the moss life cycle. The zygote develops into a sporophyte, which is the diploid plant. The sporophyte produces spores, which are haploid cells. The spores are released and germinate, starting the life cycle over again.
Bacteria are prokaryotes, which means that they do not have a nucleus or other membrane-bound organelles. Bacteria have a haploid life cycle, but they do not have a dominant phase. Protozoa are eukaryotes, which means that they have a nucleus and other membrane-bound organelles. Protozoa have a haploid life cycle, but they do not have a dominant phase.
