MCQs
1)The planet of the solar system which has maximum number of moons
Ans. Jupiter
2) Sun is a
Ans. Star
3)Age of solar system
Ans. 4.5 billion years
4)Unit of length equal to average distance between the Earth and Sun is
Ans.Astronomical unit
5) An eclipse of the sun occurs when
Ans.The moon is between the sun and the earth
6)The ozone layer protects earth from
Ans. Ultraviolet rays
7)The layer of atmosphere in which ozone lies is called
Ans. Stratosphere
8)Rocks formed by the alteration f pre-existing rocks by heat and pressure
Ans. Metamorphic rocks
9)most abundant natural iron oxides
Ans. Hematite and megnetite
10) The two most abundant elements in sea water
Ans. Sodium and chlorine
11)An electric current can produce
Ans. All of the above(heating, chemical, magnetic effect)
12)The unit of home electricity consumption is
Ans.Kilowatt hour
13) The magnet always points in the same direction, if allowed to move freely because
Ans. Earth is a huge magnet
14) Sound is reflected from floor, ceiling or wall, it mixes with the original sound and changes complexion, it is called
Ans. Reverberation
15) The speed of sound in dry air is about
Ans. 330 meters per second
16) Speed of light in vacuum is
Ans. 300 million meters per second
17) The time the sun light takes to reach earth is
Ans. 8 minutes
18) Light from the sun travels a distance before it reaches earth
Ans. 150 million kilometres
19) Most suitable thermometer for measuring boiling point of water
Ans. Bimetallic thermometer
20) The density of water is greatest at
Ans. 4 degrees celsius
21) Which of the following statements is true
Ans. Conduction currents occur only in liquids
22) Ice can be changed to water by
Ans. Changing the motion of water molecules
23) The building blocks of elements are called
Ans. Atoms
24) Boiling of an egg is a
Ans. Physical change
25) The temperature of liquid nitrogen is
Ans. -196 degrees celsius
26) Which one of the following is an alkali
Ans. Slaked lime
27) If an alkali is slowly added to acidic solution, the pH of the acidic solution will
Ans. Increase
28) The usual raw material for ceramics found beneath the top soil is
Ans. plaster of Paris(not sure)
29) Polyamides are synthetic polymers commonly known as
Ans. Nylon
30) Telephone was invented in 1876 in america by
Ans. Galileo
31) Information can be sent over long distance in the form of
Ans. Any combination of the above three
32) Information can be stored in
Ans. All of these four
33) Computers can
Ans. Add, subtract, sort and classify information
34) IBM stands for
Ans. International Business Machine
35) Chemicals used to kill weeds are called
Ans. Herbicides
36) The cytoplasm consist of several types of structures called
Ans. Organelles
37) Structure of DNA was elaborated by watson and crick in
Ans. 1953
38) In DNA molecule, the rule of base pairing
Ans.Adenine bounds with thymine and cytosine with guanine
39) Man belongs to the family
Ans. Hominidae
40) Deficiency of vitamin C causes
ans. Scurvy
41) Specific gravity of milk is measured by
Ans.Lactometer
42) One of the fundamental characteristic of living organisms is
Ans.Metabolism
43) Plants growing on other plants are
Ans. Saprophytes
44) As per eating habit, squirrels are
Ans Herbivorous
45) Water loss from leaves through stomata
is called
Ans. Transpiration
46) Study of plants and animals interact with one another is
Ans. Ecology
47) Number of bones in human body
Ans. 206
48) Nervous system consist of
Ans.Brain, spinal cord and nerves
49) In human eye light sensitive area is
Ans. Retina
50)Erythrocytes are also called
Ans. Red blood cells.