Chemistry

Ethylidene chloride is   

1, 1 Dichloro ethane.

During nitration of aniline, meta product is also formed, it is because of due to presence of anilinium ion. In anilium $-\stackrel{+}{N}{H}_3$  group is meta directing group.

Kindly consider the following Image 

Molybdenum oxide is used to convert alkane to aldehyde i.e. propane to propanal

(A) and (C) are staggered conformation. In (A) dihedral angle is 60° and in (C) dihedral angle is 180°.

Dihedral angle is angle between two specified groups.

In (C) it has maximum angle.

Ortho product has intramolecular H- bonding & para product has intermolecular H- bonding. Thus it can be separated by steam distillation due to difference in B.

Leaching of Al₂O₃ with alkali;

$\begin{array}{l}A{l}_2{O}_3\left(s\right)+2NaOH\left(aq\right)+3H_{2}O\left(l\right)\to 2Na\left[Al{\left(OH\right)}_4\right]\left(aq\right)\\ X\end{array}$

$\begin{array}{l}2Na\left[Al{\left(OH\right)}_4\right]\left(aq\right)+2C{O}_2\left(g\right)\to A{l}_2{O}_3.x{H}_{2}O\left(s\right)+2NaHC{O}_3\left(aq\right)\\ XYZ\end{array}$

Kindly go through the solution 

First reaction is EAS which will be given by that phenol derivative whose p-position is free for EAS reaction.