MCQ
A liquid boils when its vapour pressure is equal to
- Aatmospheric pressure
- Bdouble of atmospheric pressure
- C6.0 cm of Hg column
- D1000 pa or more
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$A.$ The force acting on a planet is inversely proportional to square of distance from sun.
$B.$ Force acting on planet is inversely proportional to product of the masses of the planet and the sun
$C.$ The centripetal force acting on the planet is directed away from the sun.
$D.$ The square of time period of revolution of planet around sun is directly proportional to cube of semi-major axis of elliptical orbit.
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