Science Flashcards

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1
Q

Why a small pouch containing silica gel is often found in bottles of medicine in tablet or powder form?

A

[absorbs moisture]
Notes:
Silica gel granule is a network of inter-connecting microscopic pores, which attract and hold moisture by the phenomena known as absorption.

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2
Q

Wifi uses……………… in order to transmit data whereas Li-fi uses…………… in order to transmit data

A

radio waves, visible light

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3
Q

Liquid Crystals are used in

A

Pocket calculator
display devices

wristwatches

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4
Q

Branch of medicine concerned with the study of cancer is

A

Oncology

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5
Q

who invented smallpox vaccination

A

Edward Jenner

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6
Q

Who invented ballpoint

A

John J. Loud.

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7
Q

When was the Zika virus first isolated?

A

1947

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8
Q

Lysosomes, which are known as suicide bags, are produced by which organelle?

A

Golgi Body

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9
Q

Which is the only regenerative organ in the human body?

A

The liver is the only human internal organ capable of natural regeneration of lost tissue.

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10
Q

Entomology is the science that studies

A

Insects

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11
Q

What is the pH value of human blood?

A

7.40

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12
Q

Which gases are lighter than air?

A

Hydrogen, helium, neon, nitrogen, ammonia, methane and carbon monoxide.

Oxygen, fluorine, chlorine, hydrogen chloride, carbon dioxide, sulfur dioxide, and hydrogen sulfide are heavier than air

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13
Q

name the scientist who is known as the father of modern genetics

A

Gregor Mendel

Gregor Mendel, known as the “father of modern genetics,” was born in Austria in 1822. A monk, Mendel discovered the basic principles of heredity through experiments in his monastery’s garden.

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14
Q

which color of heat radiation represents the highest temperature

A

White

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15
Q

What does airbag, used for the safety of car drivers, contain?

A

sodium azide

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16
Q

Cloves, used as spice are derived from which of the following plant parts?

A

Flower buds

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17
Q

what is the full form of scanning technique called cat

A

Computed axial tomography (CAT)

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18
Q

who invented the computer mouse

A

Douglas Engelbart

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19
Q

The chief constituent of gobar gas is

A

Methane

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20
Q

a feature Bluetooth now common in mobile phones gets its name from a

A

tenth-century king Harald Bluetooth

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21
Q

the Leaning Tower of Pisa does not fall because

A

its center of gravity has been carefully kept within its base

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22
Q

Potential Energy is described by the expression

A

PE=mgh

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23
Q

After death, which is usually empty of blood

A

Arteries and veins

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24
Q

Metals that can be easily beaten into sheets is known as

A

Malleable

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25
Q

Munchausen refers to

A

A mental disorder in which affected person fakes or exaggerates illness to gain attention and treatment

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26
Q

Leukemia is a disease related to

A

Blood

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27
Q

Which is the largest gland in human body?

A

Liver

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28
Q

The largest living flightless bird

A

Ostrich

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29
Q

The blood aorta from

A

left ventricle

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30
Q

Desert plants would be characterized by

A

Sunken Stomata

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31
Q

Why sprouted gram considered more nutritious?

A

Germinating seeds produce enzymes which are a rich source of protein

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32
Q

The edible portion of which vegetables is not a stem?

A

Corn of Colocasia

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33
Q

You are standing in a lift. The force on the floor of the lift due to your weight will:

A) become zero when the lift moves up with an acceleration of 9.8 m/s2

B) become zero when the lift moves down with an acceleration of 9.8 m/s2

C) become zero when the lift moves with an acceleration of 9.8 m/s2 in any
direction

D) remain unchanged whatever be the value of the acceleration of the lift

A

become zero when the lift moves down with an acceleration of 9.8 m/s2

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34
Q

The body’s thermostat is in the

A

hypothalamus

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35
Q

Diphtheria is a disease affecting

A

throat

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36
Q

Air-conditioning was invented by

A

Willis Carrier

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37
Q

Who invented the motorcycle?

A

Gottlieb Daimler

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38
Q

itching due to insect bite is caused by

A

Formic acid

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39
Q

A galvanometer is an instrument to measure

A

electric current

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40
Q

nephrons are the part of human

A

excretory system

kidney,

the structure that actually produces urine in the process of removing waste and excess substances from the blood. There are about 1,000,000 nephrons in each human kidney.

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41
Q

the speed of light in vacuum baby expressed in Mach numbers

A

Mach 9,00,0000

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42
Q

Aspirin is a common name for

A

acetylsalicylic acid (ASA)

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43
Q

AT a particular speed a bus starts vibrating violently due to the phenomenon of

A

Phenomenon is resonance:

When the frequency of the engine becomes equal to the body of the vehicle, some parts of the vehicle start vibrating violently. Due to resonance rattling sound is heard.

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44
Q

metal that is most abundant in the earth is

A

Aluminum

Aluminum is the most abundant metal in the Earth’s crust, and the third most abundant element therein, after oxygen and silicon.

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45
Q

A passing motorcycle causes distortion or disturbance with the reception of the signal in radio and T.V. The cause of this is :

A

The spark plug fitted in the engine produces electromagnetic signal due to sparking and this causes a disturbance in the signal.

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46
Q

the first metal used by man was

A

Copper

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47
Q

human saliva contains enzymes necessary for The breakdown of

A

starches

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48
Q

water-retaining plants adapted to arid climates are known as

A

xerophytes/ succulents

Plants adapted to living in dry environments such as succulents are termed xerophytes. However, not all xerophytes are succulents, since there are other ways of adapting to a shortage of water, e.g., by developing small leaves which may roll up or having leathery rather than succulent leaves.

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49
Q

which branch of science deals with the study of fruits

A

Pomology

50
Q

which branch of science study with flowers

A

Anthology

51
Q

a colour blind person cannot differentiate between which colors

A

red, green or blue

52
Q

rickets is caused by the deficiency of

A

deficiency of vitamin D, calcium, or phosphate.

Rickets leads to softening and weakening of the bones and is seen most commonly in children 6-24 months of age.

53
Q

the term gene was coined by

A

Wilhelm Johannsen

Danish botanist Wilhelm Johannsen coined the word “gene” (“gen” in Danish and German) in 1909 to describe these fundamental physical and functional units of heredity. William Bateson in 1905 coined the term genetics from the word gene

54
Q

for respiration deep sea divers use a mixture of

A

Hydrox, a gas mixture of hydrogen and oxygen, is used as a breathing gas in very deep diving.

55
Q

orology is

A

the study of mountains, esp. the study of how mountains are formed

56
Q

deficiency of protein causes

A

Kwashiorkor

57
Q

Xerophthalmia is a disease caused due to the deficiency of

A

vitamin A

58
Q

which instrument is used to determine the depth of sea

A

A fathometer is used to measure Ocean depth.

59
Q

the hygrometer is used to measure

A

humidity

60
Q

A tachometer is used to

A

measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analog dial, but digital displays are increasingly common.

61
Q

At which temperature the Celsius scale and the Fahrenheit scale show equal reading

A

-40 degrees

62
Q

How does the sky appear to an astronaut in the space?

A

black space.

63
Q

diopter is the unit of power of

A

A dioptre (British spelling) or diopter (American spelling) is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in meters.

64
Q

which instrument is used to measure radioactivity

A

Geiger counter

A Geiger counter is an instrument used for detecting and measuring ionizing radiation. Also known as a Geiger–Muller counter (or Geiger–Müller counter), it is widely used in applications such as radiation dosimetry, radiological protection, experimental physics, and the nuclear industry.

65
Q

star nearest to Earth is

A

Proxima Centauri

66
Q

Halley’s Comet appears once in

A

75-76 years

67
Q

Brass is an alloy of copper and?

A

Zinc

68
Q

which gas is known as laughing gas

A

Nitrous oxide

69
Q

heavy water is used in

A

nuclear reactors,

70
Q

iron is coated with zinc to prevent rusting this process is called

A

Galvanization

71
Q

deficiency of iron in the human body causes

A

Anemia

72
Q

which vitamin is found in lemon

A

vitamin C

73
Q

the foal is the baby of which animal

A

Horse

74
Q

which type of blood vessels have valves to prevent backflow

A

Veins

are blood vessels that carry blood toward the heart. This blood is no longer under much pressure, so many veins have valves that prevent the backflow of blood. Veins generally carry deoxygenated blood

75
Q

nowadays the world time is the atomic clock. It works on energy changes in

A

Cesium Atoms

76
Q

which is the fourth state of matter

A

Plasma

77
Q

penicillin is a biotic or antibiotic

A

Anti-biotic

78
Q

Search Results
Featured snippet from the web
The best sources of vitamin A are:

A

Eggs

79
Q

study of animal behavior is called

A

Ethology

80
Q

which planets do not have natural satellites

A

Mercury and Venus

81
Q

Beaufort scale measures

A

measuring wind

82
Q

what does the expression hunger signs of Crop mean

A

lack of Nitrogen, Phosphorus and potassium

83
Q

who proposed the theory that the universe is expanding

A

Edwin Hubble

84
Q

Who first proposed the Big Bang theory?

A

Georges Lemaître

A Belgian priest named Georges Lemaître first suggested the big bang theory in the 1920s, when he theorized that the universe began from a single primordial atom.

85
Q

there are asteroids between

A

the orbits of Mars and Jupiter

86
Q

what is RH in blood

A

Antigen

87
Q

diamond is an allotropic form of

A

Carbon

88
Q

Antipyretics are the drugs used against

A

Fever

89
Q

colors produced on the TV screen are

A

red, green, and blue

and the different colors we see are due to different combinations and intensities of these three primary colors.

90
Q

who propounded the cell theory

A

Matthias Schleiden and Theodor Schwann.

Cell theory was eventually formulated in 1839. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory.

91
Q

Who put forward a theory of evolution, called mutation theory. ?

A

Hugo De Vries

92
Q

who started the Binomial Nomenclature

A

Carl von Linne (Carl Linnaeus)

93
Q

who propounded the theory of Inheritance of acquired characters

A

Lamarck

If an organism changes during life in order to adapt to its environment, those changes are passed on to its offspring.

94
Q

bauxite is used in which industry

A

Aluminum Industry

95
Q

A person climbing a hill bends forward in order to

A

increase stability

96
Q

who was the first to discover the element oxygen

A

Carl Wilhelm Scheele

97
Q

Which planet is closest in size to Earth?

A

Venus

98
Q

Athlete’s foot refers to

A

The athlete’s foot — also called tinea pedis — is a contagious fungal infection that affects the skin on the feet. It can also spread to the toenails and the hands. The fungal infection is called athlete’s foot because it’s commonly seen in athletes.

99
Q

the scientist who synthesized an organic compound (urea) for the first time in the laboratory was

A

Friedrich Wöhler

100
Q

some drugs are administered in the form of capsule the capsule is made from

A

starch and cellulose)

101
Q

a significantly higher level of Urea in the blood is an indication of

A

heart failure.

102
Q

the reason why we do not feel the enormous atmospheric pressure on our body because

A

our body is full of air also .

The pressure inside lungs,blood vessels and several organs have the same pressure from inside as the atmospheric pressure is applied on our body from outside.

103
Q

organisms living inside frozen lake survive because

A

Underneath the frozen upper layer, the water remains in its liquid form and does not freeze

104
Q

ELISA test is conducted to detect

A

HIV

105
Q

Amniocentesis is the method for

A

Determining the sex of the child

106
Q

the laws of planetary motion were discovered by

A

Johannes Kepler

107
Q

the first TB vaccine was discovered by

A

French bacteriologists Albert Calmette and Camille Guérin,

108
Q

the microscope was invented by

A

Zacharias Janssen

109
Q

the hydrogen bomb is based on the principle of

A

Nuclear Fusion.

110
Q

human body each bone meets with others except

A

Hyoid Bone

111
Q

myology is the study of

A

Myology is the study of the muscular system, including the study of the structure, function, and diseases of muscle.

112
Q

hemoglobin is

A

Protein

a protein molecule in red blood cells that carries oxygen from the lungs to the body’s tissues and returns carbon dioxide from the tissues back to the lungs. Hemoglobin is made up of four protein molecules (globulin chains) that are connected together

113
Q

which is the first Muslim woman to travel the International Space station and fourth space tourist

A

Anousheh Ansari

114
Q

as soon as the water starts boiling its temperature

A

becomes constant.

As soon as the temperature reaches to the boiling point of the water at a particular pressure (please note that the boiling point of the fluid is also a function of pressure), the heat which is being supplied starts to get used up in weakening of the intermolecular forces and so the temperature of the water becomes constant.

115
Q

When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in __________

A

quality of sound

116
Q

who is considered as the father of homeopathy

A

Christian Friedrich Samuel Hahnemann

117
Q

contour bunding is used to

A

to prevent erosion in hilly areas

Contour bunding is a proven sustainable land management practice for mountainous areas, marginal, sloping, and hilly land where the soil productivity is very low.

118
Q

Brass gets discolored in air because of the presence of

A

Hydrogen sulfide.

Reason:- It is because the presence of a mixture of hydrogen and sulfide and brass is a type of thing that has a color very light and the mixture is non-temperature (the hot and cold type of temperature) so it gets discolored.

119
Q

the gas usually filled in electric bulb

A

the mixture of argon and nitrogen

120
Q

tip of matchstick contains

A

red phosphorus.