MCQ
In ionisation of hydrogen, the energy required is ............... $\mathrm{eV}$
- ✓$13.6$
- B$ > 13.6$
- C$ < 13.6$
- D$1.5$
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Consider the following statements about borax :
$a.$ Each boron atom has four $B-O$ bonds
$b.$ Each boron atom has three $B-O$ bonds
$c.$ Two boron atoms have four $B-O$ bonds while other two have three $B-O$ bonds
$d.$ Each boron atom has one $-OH$ groups
Select correct statement(s) :