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Consider the Compounds, Bcl3 and Ccl4. How Will They Behave with Water? Justify. - CBSE (Science) Class 11 - Chemistry

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Question

Consider the compounds, BCland CCl4. How will they behave with water? Justify.

Solution 1

Being a Lewis acid, BClreadily undergoes hydrolysis. Boric acid is formed as a result.

`BCl_3 + 3H_2O -> 3HCl + B(OH)_3`

CCl4 completely resists hydrolysis. Carbon does not have any vacant orbital. Hence, it cannot accept electrons from water to form an intermediate. When CCl4 and water are mixed, they form separate layers.

`CCl_4  + H_2O` -> No reaction

Solution 2

In BCl3, there is only six electrons in the valence shell of B atom. Thus, the octet is incomplete and it can accept a pair of electrons from water and hence BCl3 undergoes hydrolysis. Whereas, in CCl4, C atom has 8 electrons and its octet is complete. That’s why it has no tendency to react with water

CCl4 + H20 —————> No reaction

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 NCERT Solution for Chemistry Textbook for Class 11 (2018 to Current)
Chapter 11: The p-Block Elements
Q: 4 | Page no. 323
Solution Consider the Compounds, Bcl3 and Ccl4. How Will They Behave with Water? Justify. Concept: Important Trends and Anomalous Behaviour of Carbon.
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