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Q. What are polar molecules? Give an example.
i) A polar molecule is one in that the centre of gravity of the positive charges is separated from the centre of gravity of the negative charges by a finite distance.
ii) Instance: N2O, H2O, HCl, NH3.
iii) They have an eternal dipole moment.
When Temperature increases,intensity increases,but in some time intensity decreases,Why?
compotion of two simple harmonic motion at straight line
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How many planets are found till now? Nine.
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