51. Velocity of sound is high at 30 degree centigrade in moist air.
52. The distance between Earth and sun would be minimum on
January 3.
53. ‘Uranus’ and ‘Venus’ have sunrise in West
54. In Tiruvananthapuram
sunrays never fall perpendicularly.
55. Sun is seen in Arctic and , Antarctic even at mid night.
56. Dol drums belt will be at equatorial plane of earth.
57. Calcium carbonate is
the substance transforming into pearls
58. ’Periscope’ is used
to view objects at greater heights.
59)If we use a red flower from a blue glass, it would appear as Black.
60) If we add impurity to solvent the boiling point increases.
61) When we separate butter from milk the density of milk
decreases.
62) The air bubble inside the water acts as a Convex lens.
63) “Toricelli” has invented Barometer.
64) The heat of steam inside pressure cooker depends on
volume of pressure cooker.
65) If temperature of water is raised from 0oC to
10oC the density of water first rises up to 4oC and then
decreases.
66) Common salt gets wet in Rainy season due to presence
of impurities such as Magnesium chloride.
67) Element "Tin" has highest number of stable isotopes. It has 10 stable isotopes.
68) lightining conductors are made of copper.
69) Ignition process in diesel engines is due to compression.
70) The hydraulic breaks in automobile vehicles works on pascal principle
71)Spring balance works on Hookes law.
72) Efficiency of electric engine is high.
73) silicon is most abundant metal in ores.
74) Gobar gas consists of mainly methane.
75) Bromine is the metal existing in liquid form at room
temperature.
76) Red Phosphorous is used in matchsticks manufacturing.
77) Dry ice can be used as good refrigerant
78) Metal used in storage battery is lead
79) Sodium is stored in Kerosene
80) Methane is called as Marsh gas
81) Graphite is used as Lubricant.
82) Silicon carbide is known as Carborondom.
83) Teflon material is pasted on non stick wares.
84) In allotropic forms of Carbon, Diamond is hardest and
Graphite is soft.
85) Lead is the metal responsible for pollution of air in
cities.
86) Sulphar is added to original rubber in process of
Vulcanization.
87) Cellulose is the chemical name of Rayon.
88) Powder method is used for viping off fire due to petrol.
89) Parsec is the biggest unit of distance.
90)Density of water is 13.6 times the density of mercury.
91)Hydrometer works on Archimedes principle.
92)It is easy to swim in sea than lake because density of
sea water is high according to
Archimedes principle.
93) Embedding shock absorbers to vehicles depends on conservation of
momentum principle.
94)Due to viscocity of air clouds float in air.
95)To clean oily utensils we use hot water because it
reduces the viscocity of water and this
can clean utensils easily.
96) When wind flows , a paper on table lifts due to
Beernouli’s principle.
97)As temp increases viscocity of liquids decreases and
that of gases increases.
98)when we sleep on land we exerts less pressure on land.
99)when we are running we exerts greater pressure on land.
100)One gets blood from nose at higher mountain ranges
because pressure at higher altitudes is less than that of sea level.
No comments:
Post a Comment