Everyday Science
201. A lake starts freezing because of the cold atmosphere. It will first freeze
a. at the bottom
b. in the middle pan
c. at the top surface
d. uniformly throughout the water body
202. The Sun appears red at sunrise and sunset while it appears white at noon, because
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
203. An astronaut inside a spacecraft is in a state of weightlessness. This implies that?
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
204. An iceberg is floating in sea. How much of its mass will remain above the surface of water?
a. One tenth
b. One fifth
c. One fourth
d. One third
205. Most of the ozone in the atmosphere is concentrated in the _______?
a. Mesosphere
b. Troposphere
c. Stratosphere
d. Ionosphere
206. The cow's milk contains how much amount of water in terms of percentage?
a. 60%
b. 65%
c. 72%
d. 80%
207. T.V. transmission cannot cover a very large area because
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
208. The green house effect is caused by an excess of?
a. Carbon dioxide
b. Carbon monoxide
c. Carbon tetrachloride
d. None of the above
209. Bats can also fly in dark because they are capable of taking the help of _______?
a. Ultraviolet waves
b. Ultrasonic waves
c. Electromagnetic waves
d. Special Retina
210. What is 'Stealth Technology'?
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
211. The primary function of the feather in birds is to ________?
a. Provide insulation for preserving body heat
b. Provide striking surface to the wings for flying
c. Make the body surface waterproof
d. Impact coloration for species as well as sex recognition
212. The rear view mirror of a motor vehicle is ________?
a. Concave
b. Plane
c. Convex
d. Biconcave
213. Lead ball falls through water more slowly than through air because ________?
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
214. A Fahrenheit thermometer indicates a temperature of 14 degree Fahrenheit. Its corresponding reading on the Celsius scale will be ________?
a. -20 degree C
b. -10 degree C
c. +10 degree C
d. +20 degree C
215. Which one of the following sets of color combinations is added in color vision in TV?
a. Red, Green and Blue
b. Orange, Black and Violet
c. White, Red and Yellow
d. Yellow, Green and Blue
216. A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to _______?
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
217. Water is a highly effective coolant for a car engine because ________?
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
218. Scalding with steam is more severe than scalding by boiling water because ________?
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
219. In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as__________?
a. Electroplating
b. Annealing
c. Galvanization
d. Vulcanization
220. The cracking sound heard when dry hair is combed with a hard rubber comb is due to ________?
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
221. Detergents dissolved in water help in cleaning clothes by ________?
a. Increasing the temperature of water
b. Reacting chemically with dirt
c. Reducing the surface tension of water
d. Dissolving dirt
222. The absorption of ink by blotting paper involves ________?
a. Viscosity of ink
b. Capillary action phenomenon
c. Diffusion of ink through the blotting
d. Siphon action
223. Materials for rain-proof coats and tents owe their water proof properties to _________?
a. Surface tension
b. Viscosity
c. Specific gravity
d. Elasticity
224. A satellite moving round the earth with a uniform speed has _______?
a. An accelerated motion
b. No acceleration at all
c. Uniform acceleration
d. Uneven acceleration
225. For being able to see three-dimensional pictures we have to use _______?
a. A binocular
b. A camera
c. An epidiascope
d. A stereoscope
226. Water has maximum density at _________?
a. 0 degree Centigrade
b. 4 degree Centigrade
c. 4 degree Kalvin
d. 4.8 degree Centigrade
227. The theory of Expanding Universe was first propounded by _________?
a. Einstein
b. Newton
c. Galleon
d. Hubble
228. An instrument to detect the purity of milk is ________?
a. Lactometer
b. Hygrometer
c. Manometer
d. Sonometer
229. Coulomb is the scientific unit to measure?
a. Velocity
b. Temperature
c. Mass
d. None of these
230. Who proposed this concept "All motion is relative"?
a. Albert Einstein
b. John Kepler
c. Galileo Galilei
d. None
231. The field of specialization of famous Muslim scientist Abu Usman Al-Jahiz was?
a. Botany
b. Zoology
c. Astronomy
d. None
232. Albatross is ________?
a. A sea bird
b. A beetle
c. A fruit
d. None
233. The sunlight can reach a depth of ________ meters in the ocean.
a. 80
b. 200
c. 120
d. None
234. The biggest planet in our solar system is _______?
a. Venus
b. Pluto
c. Jupiter
d. None
235. The biggest species of the cat family is ________?
a. Tiger
b. Lion
c. Leopard
d. None
236. Which group of animals has heterogametic females?
a. Domestic fowl
b. Earthworm
c. Rabbit
d. None
237. The dominant phase of life cycle in these organism is haploid?
a. Mosses
b. Bacteria
c. Protozoa
d. None
238. The atmosphere of moon consists of __________?
a. 90% Hydrogen and 10% Nitrogen
b. 80% Nitrogen and 20% Hydrogen
c. 60% Nitrogen and 40% Inert gases
d. None
239. The chemical name of quartz is:
a. Silicon Dioxide
b. Stannous Oxide
c. Aluminum Oxide
d. None
240. Which month of calendar year can lack a new moon?
a. December
b. February
c. May
d. None
241. Deuterium differs from Hydrogen in having:
a. Different atomic number but same atomic weight
b. Different atomic number and different atomic weight
c. Same atomic number and different atomic weight
d. None
242. One of the following is a water soluble vitamin?
a. Vitamin A
b. Vitamin D
c. Vitamin K
d. None
243. Equator passes through one of these countries _________?
a. Saudi Arabia
b. Italy
c. Japan
d. None
244. Anti Diuretic hormone is secreted by one of the following glands?
a. Pituitary
b. Pancreas
c. Thyroid
d. None
245. Basha Dam is to be constructed on _________?
a. River Sutlej
b. River Jhelum
c. River Chenab
d. None
246. UV light falls in the category of ________?
a. Ionizing Radiations
b. Non Ionizing Radiation
c. Visible light
d. None
247. The earth's ________ is divided into 15 major plates of various sizes.
a. Mesosphere
b. Stratosphere
c. Lithosphere
d. None
248. One of these scientists formulated basic laws of Geometry?
a. Pythagoras
b. Archimedes
c. Aristotle
d. None
249. Phosphorus is an essential component of one of the following biological molecules:
a. Amino acids
b. Nucleic acids
c. Carbohydrates
d. None
250. He was the first scientist to prove that Planets move around the Sun?
a. Archimedes
b. Galileo Galilei
c. John Kepler
d. None
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