4. An impurity in a solid will: O Raise its melting point Lower its melting point O Have no effect on its melting point Broaden its range O Lower Melting point and broaden range

Q: 1400 Mo [D] H. [C] Pressure (in mm Hg) 1000 [A] 800 600 400 [B] E. 200 - 20 60 100 140 180 260…

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Q: 9)Who measures melting points?

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Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.