Choose the correct statements from the following. (i) Beryllium is not readily attacked by acids...

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Choose the correct statements from the following.
(i) Beryllium is not readily attacked by acids because of the presence of
\( \mathrm{P} \) an oxide film on the surface of the metal.

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(ii) Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of \( \mathrm{Be}^{2+} \) overcomes the lattice enthalpy factor.
(iii) Beryllium exhibits coordination number more than four.
(iv) Beryllium oxide is purely acidic in nature.
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