The number of $2-$ centre $-2-$ electron and $3-$ centre $-2-$ electron bonds in $B_2H_6$, respectively, are
$2$ and $1$
$4$ and $2$
$2$ and $2$
$2$ and $4$
Which of the following is known as inorganic benzene
During water-gas shift reaction
The liquefied metal which expands on solidification is
$A{l_2}{O_3}$ formation involves evolution of a large quantity of heat, which makes its use in
The correct statement$(s)$ for orthoboric acid is/are
$(A)$ It behaves as a weak acid in water due to self ionization.
$(B)$ Acidity of its aqueous solution increases upon addition of ethylene glycol.
$(C)$ It has a three dimensional structure due to hydrogen bonding.
$(D)$ It is weak electrolyte in water.
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