Question

The $Cl-C-Cl$ angle in $1,1,2,2$ - tetra chloro ethene and tetra chloro methane respectively will be about:

• A. ${120}^0$ and ${109.5}^0$
• B. ${109.5}^0$ and ${90}^0$
• C. ${90}^0$ and ${109.5}^0$
• D. ${109.5}^0$ and ${120}^0$

Answer 1

The correct option is A ${120}^0$ and ${109.5}^0$

${109.5}^{\circ }$1,1,2,2-tetrachloro ethene is an alkene thus have trigonal planar structure with $s{p}^2$ $C$. Therefore all bonds will be at ${120}^{\circ }$ tetrachloromethane is an alkane which has $s{p}^3$ $C$ will exist as tetragonal geometry will all $Cl$ at the edge of the tetrahedron. Therefore the angle will be ${109.5}^o$

Hence, option $A$ is correct.