2. Total number of plants in our solar
system 9.
3. Mercury is the nearest planet to the
sun.
4. Pluto is the farthest planet to the sun.
5. Saturn has rings around it.
6. Jupiter is the largest planet.
7. Spring
tides are caused when sun and moon are in line in relation to the earth.
8. The
outermost halo of the sun is Corona.
9. The
sun light takes 8.3 minutes to reach the earth.
10. 70%
of sun’s mass consists of Hydrogen.
11. Mars
has 2 Satellites.
12. Saturn
has 30 Satellites.
13. Skylab
was launched into space by USA in 1973.
14. Speed
of sound is 760 miles per hour.
15. First
country to launch any vehicle in space was USSR.
16. Neil
Armstrong was first man who walked on moon.
17. Jupiter
has largest numbers of satellites.
18. Venus
& Mercury has no satellite.
19. Light
year is the distance travelled by light in one year.
20. Red
Giants are stars which appear red because of their consuming a portion of their
hydrogen.
21. Lunar
eclipse takes place when earth comes in between the sun and the moon.
22. Lunar
eclipse occurs on a full moon.
23. Sun
spots are regions on sun’s photosphere visible as dark patches.
24. Asteroids
are very small planets revolving round the sun.
25. distance
of earth from sun 14,80,00,000 Km.
26. Outer
surface of the sun is called Photo sphere.
27. Temperature
of sun’s Photo Sphere is 6,000°C.
28. Rust
is a disease which affects wheat and it is caused by Fungi.
29. Other
name of Vitamin “ C “ is Ascorbic Acid.
30. Chadwick
discovered neutron.
31. Benzene
hexa chloride (B.H.C ) is used by farmers for killing harmful insects.
32. Alexander
Fleming discovered penicillin.
33. Mercury
in Thermo meters expands easily.
34. Cellulose
is a carbohydrate.
35. Lightening
flash and thunderbolt occur at the same time but light is seen first and sound is
heard later.
36. Diabetes
is a disease of metabolism.
37. Proper dose of
hormone (insulin ) keeps Diabetes under control. if not controlled, it results
in loss of weight.
38. Altimeter
is used for measuring approximate height above ground level.
39. Evaporation
of sweet on a hot day causes more cooling.
40. Johann
Gutenburg invented printing press.
41. Arthur
Compton discovered X-ray and Cosmic rays.
42. M
Curie & Piere Curie won noble prize twice.
43. Origin
of species by means of natural selection was the work of Darwin.
44. Diesel
engine was invented by Rudolph Diesel.
45. Gramo
Phone was invented by Emile Berliner.
46. Tele
scope was invented by Galileo.
47. Father
of Homeopathy is Hahnemann.
48. William
Harvey known as father of physiology discovered blood pressure.
49. Electroplating
is coating of objects by electro deposition of metal from solution of their
salts.
50. Heavy
water is used in nuclear reactors as moderator.
51. Hemo
cytometer is used to count R.B.C and W.B.C in blood.
52. Blood
typing is a method for determining the blood group of an individual.
53. Immunization
is the method in which the cure of disease is done by Vaccine.
54. Archimedes
worked on law of floatation of bodies & principle of lever.
55. Founder
of Physical Chemistry is Arrhenius.
56. Roger
Bacon invented magnifying glass.
57. John
Logie Baird invented T.V.
58. Insulin
was isolated by a Canadian scientist Banting.
59. Bell
invented Telephone.
60. Sodium
depletion occurs in excessive sweating and cannot be corrected by drinking
water alone, it may lead to Muscle cramps, loss of energy, fatigue and
faintness.
61. Iris
regulates and controls the entry of light into human eye.
62. Retina
in the eye acts as a lens in camera.
63. Heart
of normal adult weighs about 300 grams.
64. Heart
pumps blood 5 liter per minute.
65. Pathogenic
term may be applied to all diseases producing micro organism.
66. In
certain diseases antibiotics are administered, object is to inhibit the growth
of bacteria.
67. Sulfa
drugs are effective against diseases caused by bacteria.
68. A substance used
for destroying micro-organisms and rendering the material sterile is called An
disinfectant.
69. Bacillus
causes tuberculosis.
70. The
temperature above which a substance can exist only in its gaseous state and
cannot be liquefied regardless
of the magnitude of pressure exerted on it is called critical temperature.
71. Atoms of an
element having the same atomic number but different atomic weights are called
isotopes.
72. The quantity
of heat that 1 gram of a substance absorbs or evolves during the change of its
state at a constant temperature from solid to liquid and from liquid to
saturated vapour is called latent heat.
73. Isomerism is
phenomenon in which 2 or more compounds are made up of the same number and kind
of atoms but different in their properties due to different arrangements of
atoms with their molecules.
74. Isomorphism is similarity
of crystalline form, indicating similar or analogous chemical composition.
75. Allotropy is existence of an element in
more then one form in the same physical state.
76. A
property of some substances of absorbing moisture from the air on exposure is
called desiccation.
77. The
substance which acts both as a base and as an acid under different
circumstances is called amphoteric.
78. A
mixture of concentrated nitric and hydrochloric acids in the ratio 1:3 is
called aqua regia.
79. The
phenomenon in which a chemical reaction is accelerated or retarded by the mere
presence of a substance which remains unchanged at the end of the reaction is
called catalysis.
80. A
substance which changes readily into vapour without heating is called volatile.
81. Chemical
union of two or more molecules of the same compound to form larger molecule is
called polymerization.
82. Oxidation
is addition of oxygen or removal of hydrogen.
83. Pyrolusite
is ore of manganese.
84. Sublimation
is conversion of a solid directly into vapour and its subsequent condensation
without melting.
85. The
atomic state of an element as a result of chemical reaction in which it is more
active than in ordinary molecular state is called nascent state.
86. In a
normal healthy body the number of red cells or erytho cytes is 50 lack/cubic
millimeter.
87. Average
life of a red blood cell is 115 days.
88. Red
blood cell originates in Bone Marrow.
89. Amount
of Haemoglobin present in blood is about 15 gm per 100 ml blood and this amount
is usually called 100% over 90% is considered normal.
90. Sodium
Benzoate is used as a preservative for food articles.
91. DNA is
a class of nucleic acids.
92. Luster
of diamond is due to total internal reflection.
93. Milk in
natural form has a certain amount of sugar . This is called lactose.
94. Glucose
is a source of ready energy.
95. Cyclotron
is an instrument for accelerating energies of charged particles of atom
96. Drinker’s
apparatus is used by doctors to measure the blood alcoholic content in the body
of an alcoholic person.
97. Fathomo
meter is used for determining depth of oceans.
98. Hydrophone
is used to measure sound under water.
99. Hydrometer
is used to measure relative humidity in atmosphere.
100. Megnato meter
is used to compare the magnetic field and movement.
101. Mariner’s
compass is made of magnetized iron needle.
102. Periscope
is used for viewing objects lying beyond the limits of eyes of observer and whose
direct vision is obstructed.
103. Pyrheliometer
is an instrument used for measuring solar radiations.
104. Potometer
is used for measuring the rate of respiration in animal and plants.
105 . Radar(Radio
detection and ranging) is a device for locating the position of aircraft flying
with in range of action.
106. Rain Gauge
is used for measuring rainfall.
107. Sextant
is used to determined angular distance between 2 objects.
108. Arterial
blood pressure is measured by sphygmo manometer.
109. Atomic
pile is a nuclear reactor where the nuclear fission is made.
110. Thresher
is atomic powered submarine.
111. Fire extinguisher
contains sodium carbonate or sodium bicarbonate & sulphuric acid.
112. Loudspeaker
converts electrical energy to sound energy.
113. Refrigerators
work on the principle of compression and expansion of liquids.
114. Tape
recorders used an electronic tape .
115. Dewar’s
flask is also called a thermos.
116. Atomic
weights of chemical compounds are determined through mass spectroscopy.
117. Dry ice
is solid carbon dioxide.
118. Cocci
causes pneumonia.
119. Virus
causes cold.
120. Bacillus
causes cholera.
121. Nectar
& fruit juices are food chief of a male mosquito.
122. Chief
food of a house fly is decaying organic material.
123. Chief
food of mosquito larva is micro organism found in water.
124. Rickets
directly affects bone tissue.
125. Pneumonia
affects respiratory system.
126. Rabies
affects nervous system.
127. Beri
beri affects nervous system.
128. As the
amount of clay in a soil increases its water retaining capacity increases.
129. As the
number of micro organisms in a soil increases the amount of humus in the same
oil increases.
130. “ O “
blood group is a universal donor.
131. Hemoglobin
is rich in iron and is a complex protein and has great affinity for oxygen.
132. Ptyalin
is a starch digesting enzyme.
133. Milk
relatively has the highest fat content.
134. Bile
does not contain enzymes.
135. Formic
acid is used in dyeing, tanning and electroplating.
136. Alum is
used in dyeing and tanning.
137. Acrylonitrile
is used in the manufacture of plastic, rubber and artificial textile fibers.
138. Acetone
is used in the manufacture of rayon, plastics and chloroform.
139. Terylene
is synthetic textile fibers obtained by the polymerization of adipic acid and
hexamethylene diamine.
140. Diaspore,
Felspar, Alurite, Zibcite and Bauxite are ores of Aluminium.
141. Kainite
is metal are of potassium.
142. Dolomite
is ore of Magnesium.
143. Selenium
is not a metal.
144. Erbium
is a metal.
145. Mercury,
Calcium and Bismuth are metals.
146. Tellurium
and carbon are Non metals.
147. Nicotine
is used for delousing poultry and as plant insecticide.
148. Indigo
which has formerly obtained from the leaves of Indigofera is now synthetically
prepared from anthranillic acid.
149. Curaine
is used as paralyzing agent.
150. Because
of lesser value of “ g “ a tennis ball bounces more on hills then on plains.
151. At high
altitude, pressure is less and therefore boiling point of water is decreased.
152. Among
carbon, Rubber, Glass, and paper, the most elastic is glass.
153. Blotting
paper absorbs ink because of capillary action.
154. The
phases of the moon are partially result of revolution of the moon about the
earth.
155. Molasses
are a by product of sugar industry.
156. Photo
synthesis does not increase the amount of CO₂ in the air.
157. For softening water possessing temporary
hardness , Boiling ,Filtration and distillation
processes are used.
158. Adrenal,Pituitary and thyroid are ductless
glands.
159. Lachrymal is not ductless gland.
160. Encephalitis is a viral disease.
161. Natural bath sponge is known as Euspongia.
162. Round worm, the common intestinal parasite
in man is Ascaris.
163. Tape worm of man is generally Taenia.
164. Liver fluke biologically called Fasciola is
found in liver of sheep.
165. Earth worm is bisexual.
166. Eyes of insects are special . This is
because their eyes are compound.
167. Silk is obtained from the cocon of silk
worm.
168. Chemical nature of silk is protein.
169. Head Louse transmits typhoid.
170. Tse-tse fly transmits sleeping sickness.
171. Enzyme found in saliva is ptylin.
172. Fat of milk is readily digested by gastric
juices.
173. Toxic components absorbed through food are
mainly detoxified by liver.
174. Colon is mainly responsible for water
absorption from the undigested residue.
175. Vitamin concerned with vision is Vitamin A.
176. Vitamin B1 is available in yeast.
177. Thiamine deficiency causes beri-beri.
178. Scurry arising due to deficiency of Vitamin
C is related to gastro intestinal disorder.
179. Mineral necessary for nervous system is
sodium.
180. Vitamin necessary for calcium metabolism in
body is Vitamin D
181. Rate of heart beat per minute is 70.
182. Ampere is unit of flow of electric current.
183. Unit of electric power is watt.
184. Unit of Electromotive force is Volt.
185. Clinical thermometer usually measure in
Fahrenheit scale.
186. Tube light emits radiation even after it is
dis connected, it is due to fluorescence.
187. Dilution
of milk is measured by Lacto meter.
188. Shortsightedness
is corrected by Concave Lenses.
189. Eye
defects due to the weakening of muscles in old age are corrected by bifocal
arrangements.
190. Supersonics
or Ultrasonic are sound waves of frequency above the audible limits.
191. Transformer
is a device used for changing voltage of AC.
192. Rectifier
is used for changing AC to DC.
193. Actinometer
is an instrument for measuring direct heating power of the sun.
194. Ammeter
is used for measuring current strength.
195. Binocular
is used to see the distant object magnified.
196. Cardiograph
is an instrument for measuring movements of the heart.
197. Entomology
is science that studies insects.
198. Trachoma
is a disease of eyes.
199. Jaundice,
influenza, and mumps are caused by Viruses.
200. Sunlight,
water and CO₂ are needed for
Photosynthesis.
201. Physiology
is the study of functions of the human body.
202. Excessive
intake of polished rice causes deficiency of Vitamin B
203. White
blood cells are larger in size but fewer in number than the Red Blood Cells.
204. video
cassette recorder (VCR)
205. DVD :Digital
Video Disc
206. CD :
Compact Disk