1 mol each of the following compounds is dissolved in 1 L of solution. Which will have the largest `Delta T_(h)` value ?

Options

A. HF
B. HCl
C. HBr
D. Hl

Answer

D

Explanation

Bond siddociation energy increases in the order.
`HI lt HBr lt HCl lt HF`
HF is most stable halogen acid and HI is the least. Higher the bond dissociation energy, lower is the degree of ionisation.
As we know `Delta T_(b)=ik_(b)m`.
Hence `Delta T_(h)` value is largest in HI. All colligative properties depend on number of particles.