Colemanite is
- A$Ca[B_3O_4(OH)_2] \cdot 2H_2O$
- B$Ca_2B_6O_{11} \cdot 5H_2O$
- C$Ca(OH)_2$
- D$Na_2B_4O_7 \cdot 2H_2O$
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Similar Questions
Which reactions can be used to prepare diborane?
$I.$ $3NaBH_4 + 4BF_3 \xrightarrow{\text{ether}} 2B_2H_6 + 3NaBF_4$
$II.$ $2NaBH_4 + I_2 \to B_2H_6 + 2NaI + H_2$
$III.$ $2BF_3 + 6NaH \xrightarrow{450 \ K} B_2H_6 + 6NaF$
$I.$ $3NaBH_4 + 4BF_3 \xrightarrow{\text{ether}} 2B_2H_6 + 3NaBF_4$
$II.$ $2NaBH_4 + I_2 \to B_2H_6 + 2NaI + H_2$
$III.$ $2BF_3 + 6NaH \xrightarrow{450 \ K} B_2H_6 + 6NaF$
Medium
View SolutionIdentify the incorrect statement about the group $13$ elements.
Aluminum dissolves in mineral acids and aqueous alkalis and thus shows amphoteric character. $A$ piece of aluminum foil is treated with dilute hydrochloric acid or dilute sodium hydroxide solution in a test tube and on bringing a burning match stick near the mouth of the test tube,a pop sound indicates the evolution of hydrogen gas. The same activity when performed with concentrated nitric acid,the reaction does not proceed. Explain the reason.
Medium
View SolutionDraw the structure of diborene $(B_2H_4)$.
Easy
View SolutionWhat is the formula of meta-boric acid?
Easy
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