The number of $P-H$ bond$(s)$ in $H_3PO_2, H_3PO_3$ and $H_3PO_4$,respectively,is

  • A
    $2, 0, 1$
  • B
    $1, 1, 1$
  • C
    $2, 0, 0$
  • D
    $2, 1, 0$

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Anhydrous $AlCl_3$ cannot be obtained from which of the following reactions?

Pick the correct statement.
$I$. Borax is a white crystalline solid containing $\left[B_4 O_5(OH)_4\right]^{2-}$ units.
$II$. The aqueous solution of borax is acidic in nature.
$III$. Cobalt gives a blue color in the borax bead test.

The number of terminal and bridging hydrogens in $B_2H_6$ are respectively

Which is not true about borax?

The incorrect statement regarding $X$ in the given reaction is:
$BF_3 + LiAlH_4 \xrightarrow{\text{Ether}} X + LiF + AlF_3$

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