Question

Heating of $MgC{l_2}.6{H_2}O$ gives anhydrous $MgC{l_2}$ . If true enters 1, else enter 0.

Answer 1

$MgC{l_2}.6{H_2}O$on heating will give $MgC{l_2}$ and $6{H_2}O$ and it means that $MgC{l_2}$ is available in anhydrous form. $MgC{l_2}.6{H_2}O$ removes water.

Complete step wise step answer:
$MgC{l_2}.6{H_2}O$ undergoes partial hydrolysis on its own water molecules of crystallization when it is heated. $MgC{l_2}.6{H_2}O$ upon heating gives $MgC{l_2}.2{H_2}O$ and then $Mg\left( {OH} \right)Cl$ or $MgOCl{\text{ }} + {\text{ }}HCl$ which it is strongly heated gives MgO. When $MgC{l_2}$ is strongly heated, then it forms MgO.
On heating, $MgC{l_2}.6{H_2}O$ readily loses 4 molecules of water of crystallization to form $MgC{l_2}$. Upon heating, $MgC{l_2}.6{H_2}O$ went upon the processes of dehydration and hydrolysis simultaneously accompanied by the release of HCl between ${150^0}C$ and $500^\circ C$. The remaining two molecules of water are not removed but react chemically with $MgC{l_2}$ to form MgO. The thermal decomposition mechanisms and the intermediate morphology of $MgC{l_2}.6{H_2}O$ and $MgC{l_2}.{H_2}O$ were observed using integrated thermal analysis, X-ray diffraction, scanning electron microscope and chemical analysis.
This results showed that there was six steps in the thermal decomposition of $MgC{l_2}.6{H_2}O$: producing $MgC{l_2}.4{H_2}O$ at $69^\circ C$, $MgC{l_2}.2{H_2}O$ at $129^\circ C$, $MgC{l_2}.{H_2}O$ $\left( {1 \leqslant n \leqslant 2} \right)$ and $Mg(OH)Cl$ at $167^\circ C$ ,
the conversion of $MgC{l_2}.{H_2}O$ $\left( {1 \leqslant n \leqslant 2} \right)$ to $Mg(OH)Cl.3{H_2}O$ by continuous dehydration and hydrolysis at $203^\circ C$, the dehydration of $Mg(OH)Cl.3{H_2}O$ to $Mg(OH)Cl$ at $235^\circ C$ , and hence the direct conversion of $Mg(OH)Cl$ to the cylindrical particles of MgO at $415^\circ C$.
So, It's true that $MgC{l_2}.6{H_2}O$ on heating gives anhydrous $MgC{l_2}$ ,

so we enter 1.

Note: $MgC{l_2}.6{H_2}O$ went through the processes of dehydration and hydrolysis simultaneously accompanied by the release of HCl between ${150^0}C$ and $500^\circ C$. At a temperature higher than $500^\circ C$, $Mg\left( {OH} \right)Cl$ gradually releases part of HCl.