Science Flashcards
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.
2
Q
Wifi uses……………… in order to transmit data whereas Li-fi uses…………… in order to transmit data
A
radio waves, visible light
3
Q
Liquid Crystals are used in
A
Pocket calculator
display devices
wristwatches
4
Q
Branch of medicine concerned with the study of cancer is
A
Oncology
5
Q
who invented smallpox vaccination
A
Edward Jenner
6
Q
Who invented ballpoint
A
John J. Loud.
7
Q
When was the Zika virus first isolated?
A
1947
8
Q
Lysosomes, which are known as suicide bags, are produced by which organelle?
A
Golgi Body
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.
10
Q
Entomology is the science that studies
A
Insects
11
Q
What is the pH value of human blood?
A
7.40
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
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.
14
Q
which color of heat radiation represents the highest temperature
A
White
15
Q
What does airbag, used for the safety of car drivers, contain?
A
sodium azide
16
Q
Cloves, used as spice are derived from which of the following plant parts?
A
Flower buds
17
Q
what is the full form of scanning technique called cat
A
Computed axial tomography (CAT)
18
Q
who invented the computer mouse
A
Douglas Engelbart
19
Q
The chief constituent of gobar gas is
A
Methane
20
Q
a feature Bluetooth now common in mobile phones gets its name from a
A
tenth-century king Harald Bluetooth
21
Q
the Leaning Tower of Pisa does not fall because
A
its center of gravity has been carefully kept within its base
22
Q
Potential Energy is described by the expression
A
PE=mgh
23
Q
After death, which is usually empty of blood
A
Arteries and veins
24
Q
Metals that can be easily beaten into sheets is known as
A
Malleable
25
Munchausen refers to
A mental disorder in which affected person fakes or exaggerates illness to gain attention and treatment
26
Leukemia is a disease related to
Blood
27
Which is the largest gland in human body?
Liver
28
The largest living flightless bird
Ostrich
29
The blood aorta from
left ventricle
30
Desert plants would be characterized by
Sunken Stomata
31
Why sprouted gram considered more nutritious?
Germinating seeds produce enzymes which are a rich source of protein
32
The edible portion of which vegetables is not a stem?
Corn of Colocasia
33
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
become zero when the lift moves down with an acceleration of 9.8 m/s2
34
The body's thermostat is in the
hypothalamus
35
Diphtheria is a disease affecting
throat
36
Air-conditioning was invented by
Willis Carrier
37
Who invented the motorcycle?
Gottlieb Daimler
38
itching due to insect bite is caused by
Formic acid
39
A galvanometer is an instrument to measure
electric current
40
nephrons are the part of human
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.
41
the speed of light in vacuum baby expressed in Mach numbers
Mach 9,00,0000
42
Aspirin is a common name for
acetylsalicylic acid (ASA)
43
AT a particular speed a bus starts vibrating violently due to the phenomenon of
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.
44
metal that is most abundant in the earth is
Aluminum
Aluminum is the most abundant metal in the Earth's crust, and the third most abundant element therein, after oxygen and silicon.
45
A passing motorcycle causes distortion or disturbance with the reception of the signal in radio and T.V. The cause of this is :
The spark plug fitted in the engine produces electromagnetic signal due to sparking and this causes a disturbance in the signal.
46
the first metal used by man was
Copper
47
human saliva contains enzymes necessary for The breakdown of
starches
48
water-retaining plants adapted to arid climates are known as
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.
49
which branch of science deals with the study of fruits
Pomology
50
which branch of science study with flowers
Anthology
51
a colour blind person cannot differentiate between which colors
red, green or blue
52
rickets is caused by the deficiency of
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
the term gene was coined by
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
for respiration deep sea divers use a mixture of
Hydrox, a gas mixture of hydrogen and oxygen, is used as a breathing gas in very deep diving.
55
orology is
the study of mountains, esp. the study of how mountains are formed
56
deficiency of protein causes
Kwashiorkor
57
Xerophthalmia is a disease caused due to the deficiency of
vitamin A
58
which instrument is used to determine the depth of sea
A fathometer is used to measure Ocean depth.
59
the hygrometer is used to measure
humidity
60
A tachometer is used to
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
At which temperature the Celsius scale and the Fahrenheit scale show equal reading
-40 degrees
62
How does the sky appear to an astronaut in the space?
black space.
63
diopter is the unit of power of
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
which instrument is used to measure radioactivity
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
star nearest to Earth is
Proxima Centauri
66
Halley's Comet appears once in
75-76 years
67
Brass is an alloy of copper and?
Zinc
68
which gas is known as laughing gas
Nitrous oxide
69
heavy water is used in
nuclear reactors,
70
iron is coated with zinc to prevent rusting this process is called
Galvanization
71
deficiency of iron in the human body causes
Anemia
72
which vitamin is found in lemon
vitamin C
73
the foal is the baby of which animal
Horse
74
which type of blood vessels have valves to prevent backflow
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
nowadays the world time is the atomic clock. It works on energy changes in
Cesium Atoms
76
which is the fourth state of matter
Plasma
77
penicillin is a biotic or antibiotic
Anti-biotic
78
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The best sources of vitamin A are:
Eggs
79
study of animal behavior is called
Ethology
80
which planets do not have natural satellites
Mercury and Venus
81
Beaufort scale measures
measuring wind
82
what does the expression hunger signs of Crop mean
lack of Nitrogen, Phosphorus and potassium
83
who proposed the theory that the universe is expanding
Edwin Hubble
84
Who first proposed the Big Bang theory?
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
there are asteroids between
the orbits of Mars and Jupiter
86
what is RH in blood
Antigen
87
diamond is an allotropic form of
Carbon
88
Antipyretics are the drugs used against
Fever
89
colors produced on the TV screen are
red, green, and blue
and the different colors we see are due to different combinations and intensities of these three primary colors.
90
who propounded the cell theory
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
Who put forward a theory of evolution, called mutation theory. ?
Hugo De Vries
92
who started the Binomial Nomenclature
Carl von Linne (Carl Linnaeus)
93
who propounded the theory of Inheritance of acquired characters
Lamarck
If an organism changes during life in order to adapt to its environment, those changes are passed on to its offspring.
94
bauxite is used in which industry
Aluminum Industry
95
A person climbing a hill bends forward in order to
increase stability
96
who was the first to discover the element oxygen
Carl Wilhelm Scheele
97
Which planet is closest in size to Earth?
Venus
98
Athlete's foot refers to
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
the scientist who synthesized an organic compound (urea) for the first time in the laboratory was
Friedrich Wöhler
100
some drugs are administered in the form of capsule the capsule is made from
starch and cellulose)
101
a significantly higher level of Urea in the blood is an indication of
heart failure.
102
the reason why we do not feel the enormous atmospheric pressure on our body because
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
organisms living inside frozen lake survive because
Underneath the frozen upper layer, the water remains in its liquid form and does not freeze
104
ELISA test is conducted to detect
HIV
105
Amniocentesis is the method for
Determining the sex of the child
106
the laws of planetary motion were discovered by
Johannes Kepler
107
the first TB vaccine was discovered by
French bacteriologists Albert Calmette and Camille Guérin,
108
the microscope was invented by
Zacharias Janssen
109
the hydrogen bomb is based on the principle of
Nuclear Fusion.
110
human body each bone meets with others except
Hyoid Bone
111
myology is the study of
Myology is the study of the muscular system, including the study of the structure, function, and diseases of muscle.
112
hemoglobin is
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
which is the first Muslim woman to travel the International Space station and fourth space tourist
Anousheh Ansari
114
as soon as the water starts boiling its temperature
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
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 __________
quality of sound
116
who is considered as the father of homeopathy
Christian Friedrich Samuel Hahnemann
117
contour bunding is used to
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
Brass gets discolored in air because of the presence of
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
the gas usually filled in electric bulb
the mixture of argon and nitrogen
120
tip of matchstick contains
red phosphorus.
