AP EAMCET202022 Sep 2020Evening ShiftChemistrys Block ElementsActual
Choose the correct statement from the following. (i) Beryllium is not readly attacked by acids because of the presence of an oxide film on the surface of the metal. (ii) BeO is an amphoteric oxide. (iii) Beryllium exhibits coordination number more than four. (iv) Beryllium oxide is purely acidic in nature.
Options
- A(i)
- B(ii)
- C(iii)
- D(iv)
Correct answer
A. (i)
Step-by-step solution
Be is not readily attacked by acids due to formation of oxide layer. The surface of beryllium metal is covered with a thin layer of oxide that helps protect the metal from attack by air. It does not oxidise in air even at 600^ C . 2 Be + O ₂ 2 BeO Hence, statement (a) is correct.