Give reasons for the following:

(A) CCl₄ is immiscible in water, whereas SiCl₄ is easily hydrolysed.

(B) Carbon has a strong tendency for catenation compared to silicon.

<p>This is a Short Answers Type Questions as classified in NCERT Exemplar</p><p><strong> (A)</strong> sarbon in CCl₄ does not have a vacant d-orbital to accommodate the electrons from OH of water molecules. Also CCl₄ is nonpolar covalent compounds whereas H₂O is polar. So, no strong interaction occurs between them. Hence CCl₄ is miscible in water.</p><p>&nbsp;</p><p>Whereas in SiCl₄, silicon has bigger size than carbon and have d-orbitals for accommodation of electrons donated by OH of water in the process of hydroxylation. This leads to a strong interaction and silicon acid Is formed as a product. SiCl₄ is completely miscible in water.</p><p>&nbsp;</p><p><strong> (B) </strong>As we move from carbon to silicon, the size increases and electronegativity decreases. This results in the decrease in M-M bond energy. Hence the catenation property decreases.</p><p>&nbsp;</p><p>Bond energy is the amount of energy required to fragment the atoms combined in a molecule are born into separate atoms. Carbon has maximum bond energy as compared to silicon. Therefore, shows maximum catenation property.</p>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment