The covalency and oxidation state respectively of boron in $[BF_4]^-$ are
- A$4$ and $3$
- B$4$ and $4$
- C$3$ and $4$
- D$3$ and $5$
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$Na_2B_4O_7 \cdot 10H_2O \xrightarrow{\text{Heat}} X + NaBO_2 + H_2O$,$X + Cr_2O_3 \xrightarrow{\text{Heat}} \underset{(\text{Green coloured})}{Y}$. $X$ and $Y$ are
Which of the following properties does not support the anomalous behavior of $Boron$?
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View SolutionWhich of the following compounds exhibits acidic nature?
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View SolutionMatch the following compounds in List-$I$ with their uses in List-$II$:
List-$I$ (Compounds) List-$II$ (Uses) $A$. Boron-$10$ $I$. Antiseptic $B$. Borax $II$. Bullet proof vest $C$. Boron-fibre $III$. Neutron absorber $D$. Orthoboric acid $IV$. Heat resistance glasses
| List-$I$ (Compounds) | List-$II$ (Uses) |
| $A$. Boron-$10$ | $I$. Antiseptic |
| $B$. Borax | $II$. Bullet proof vest |
| $C$. Boron-fibre | $III$. Neutron absorber |
| $D$. Orthoboric acid | $IV$. Heat resistance glasses |
Which base among the following reacts with diborane to cleave it unsymmetrically?
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