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By which process is the grain seperated from the chaff?
Why do migratory birds fly to far away places ?
Where does fertilization takes place ?
What is force ?
Both (1) and (2)
None of these
What is the protruding voice box in boys called?
Both a & b
Where is the Ranthambore National Park located?
What is the jelly like substance between the nucleus & the cell membrane called?
What does the friction depends upon?
Nature of surface
Nature of object
What is the beam of light striking the reflecting surface called ?
Why is plastic used in industry and homes?
All of the three
Which metal is found in liquid state at room temperature ?
Which instrument is used to measure atmospheric pressure?
None of the above
What is the frictional force exerted by fluids called?
If a tuning fork has frequency of 100 Hz, what will be its periodic time?
What happens when two charged balloons are brought closer to each other ?
Which is the purest form of carbon ?
What does burning of coal and diesel release?