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A metal surface is exposed to solar radiations:
(1) The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations
(2) The emitted electrons have energy less than maximum value of energy depending upon intensity of incident radiation
(3) The emitted electrons have energy equal to energy of photos of incident light
(4) The emitted electrons have zero energy
Ans: The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations
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COMPOUNDS A AND B CONTAIN COPPER AND SULPHUR.EACH CONTAINS 20% AND 33.33% EACH BY MASS OF SULPHUR RESPECTIVELY.FIND THE RATIO OF THE ELEMENTS USING THE THIRD LAW OF CHEMICAL COMBIN
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This of the following occurs when two hydrogen atoms bond with each others: (1) Potential energy is lowered (2) Kinetic energy is lowered (3) Electronic motion ceases
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