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Hydrogen — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryHydrogen1 Mark
MCQ
Which of the following is incorrect statement?
  • A
    $s-$ block elements, except $\text{Be}$ and $\text{Mg},$ form ionic hydrides.
  • B
    $\text{BeH}_2,\text{MgH}_2,\text{CuH}_2,\text{Znh}_2,\text{CaH}_2$ and $\text{HgH}_2$ are intermediate hydrides.
  • C
    $p-$ block elements form covalent hydrides.
  • ✓
    $d$ and $f-$ block elements form ionic hydrides.
✓

Answer

Correct option: D.
$d$ and $f-$ block elements form ionic hydrides.
$d$ and $f-$ block elements form metallic hydrides. $p-$ block elements form covalent hydrides, $s-$ block elements except $\text{Be}$ and $\text{Mg}$ form ionic hydrides. Hydrides of $\text{Be, Mg, Cu, Zn, Ca}$ and $\text{Hg}$ are intermediate hydrides.

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