Consider following flow diagram :- Compound X and Y are respectively.

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p-Block Elements - I

hard

Consider the following flow diagram :-

Compound $X$ and $Y$ are respectively.

$Na_2B_4O_7.10H_2O, B_2O_3$

$NaBO_2, Na_2B_4O_7.10H_2O$

$NaBO_2, CaCO_3$

$Na_2B_4O_7.10H_2O, CaCO_3$

Solution

$\mathop {2CaO.3{B_2}{O_3}}\limits_{Colemanite} + 2N{a_2}C{O_3} \to $ $2CaCO_3^ – + N{a_2}{B_4}{O_7} + 2NaB{O_2}$ $\xrightarrow{\begin{subarray}{l}
Filtered \\
– CaC{O_3}\,(as\,residue)
\end{subarray} }\underbrace {N{a_2}{B_4}{O_7} + NaB{O_2}}_{in\,solution}$ $\xleftarrow[\begin{subarray}{l}
and\,allowed\,to\, \\
crystallise\,out \\
and\,filtered
\end{subarray} ]{{Concentrated}}\mathop {N{a_2}{B_4}{O_7}.10{H_2}O}\limits_{as\,residue} $ $\mathop { + NaB{O_2}}\limits_{in\,filtrate} \xrightarrow{\begin{subarray}{l}
C{O_2}\,passed\,and \\
crystallise\,out\,again
\end{subarray} }N{a_2}{B_4}{O_7}.10{H_2}O \downarrow $

$[4NaB{O_2} + C{O_2} \to N{a_2}{B_4}{O_7} + N{a_2}C{O_3}]$

Standard 11

Chemistry

Describe the shapes of $BF $$_{3}$ and $BH _{4}^{-}$. Assign the hybridisation of boron in these species.

medium

Aluminium chloride exists as a dimer, $Al_2Cl_6,$ in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives:

medium

Consider the following reaction

$(a)\, B_2H_6 + 6H_2O \to$
$(b)\, B_2H_6 + 6CH_3OH \to$
$(c)\, B_2H_6 + 3Cl_2 \to$
$(d)\, BR_3 + 3CH_3COOH \to$

Identify incorrect statement about product $(s)$

medium

In some of the reactions thallium resembles aluminium, whereas in others it resembles with group $1$ metals. Support this statement by giving some evidences.

easy

Give reasons:

$(i)$ Conc. $HNO _{3}$ can be transported in aluminium container.

$(ii)$ $A$ mixture of dilute $NaOH$ and aluminium pieces is used to open drain.

$(iii)$ Graphite is used as lubricant.

$(iv)$ Diamond is used as an abrasive.

$(v)$ Aluminium alloys are used to make aircraft body.

$(vi)$ Aluminium utensils should not be kept in water overnight.

$(vii)$ Aluminium wire is used to make transmission cables.

medium

Consider the following flow diagram :- Compound $X$ and $Y$ are respectively.

Solution

Similar Questions

Describe the shapes of $BF $$_{3}$ and $BH _{4}^{-}$. Assign the hybridisation of boron in these species.

Aluminium chloride exists as a dimer, $Al_2Cl_6,$ in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives:

Consider the following reaction $(a)\, B_2H_6 + 6H_2O \to$ $(b)\, B_2H_6 + 6CH_3OH \to$ $(c)\, B_2H_6 + 3Cl_2 \to$ $(d)\, BR_3 + 3CH_3COOH \to$ Identify incorrect statement about product $(s)$

In some of the reactions thallium resembles aluminium, whereas in others it resembles with group $1$ metals. Support this statement by giving some evidences.

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Consider the following flow diagram :-

Compound $X$ and $Y$ are respectively.

Consider the following reaction

$(a)\, B_2H_6 + 6H_2O \to$
$(b)\, B_2H_6 + 6CH_3OH \to$
$(c)\, B_2H_6 + 3Cl_2 \to$
$(d)\, BR_3 + 3CH_3COOH \to$

Identify incorrect statement about product $(s)$