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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
MCQ
Which is not correct in case of $\ce{Be}$ and $\ce{Al}\ ?$
  • A
    Both are rendered passive by conc. $\ce{HNO_3}$.
  • B
    Carbides of both give methane on hydrolysis.
  • ✓
    Both give hydroxides which are basic.
  • D
    Both give covalent chlorides.
✓

Answer

Correct option: C.
Both give hydroxides which are basic.
Both form amphoteric hydroxide/oxide not either basic or acidic.
Because as Aluminium is in $3^{rd}$ group it can either accept electron or donate hence they form oxides which are amphoteric.
The reason why beryllium forms is aluminium and beryllium has diagonal relationship.
Hence both will have common properties.

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