How many different types of $OBO$ angles are there in sodium peroxoborate ?
$2$
$3$
$5$
$1$
In Goldschmidt aluminothermic process, thermite contains
Which of the following structure is similar to graphite ?
$N{a_2}{B_4}{O_7}.10{H_2}O\xrightarrow{{Heat}}X + NaB{O_2} + {H_2}O,X + C{r_2}{O_3}\xrightarrow{{Heat}}\mathop Y\limits_{\left( {Green\,coloured} \right)} $ $X$ and $Y$ are
Which of the following is most acidic
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