Final answer:
The approximate chlorine-carbon-chlorine bond angle in C₂Cl₄ is approximately 109.5°.
Step-by-step explanation:
The approximate chlorine-carbon-chlorine bond angle in C₂Cl₄ is approximately 109.5°. This is because the carbon atoms in C₂Cl₄ have a tetrahedral molecular geometry, where the chlorine atoms are located at the four corners of a tetrahedron.
In a tetrahedral geometry, the bond angles between the four bonding pairs of electrons are about 109.5°.
Therefore, the chlorine-carbon-chlorine bond angle is approximately 109.5°.