melting point, Chemistry

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how can the melting point be used to determine the purity of organic compounds

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de-Broglie equation is: (1) n γ= 2d sin θ                                (2) E= hv               (3) E= mc 2                           (4) γ= h/ mv Ans: γ= h/ mv

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i) Electrophillic substitution in case of aromatic amines takes place more readily than benzene. ii) Nitro compounds have higher boiling points than hydrocarbons having almost s

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The Bohr orbit radius for the hydrogen atom (n=1)   is approximately  0.530 Å . The radius for the first excited state (n=2)  orbit is: (1) 0.13Å

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