Question

Hcl hbr hi hf decreasing reactivity towards alkene

Answer 1

Hf>hcl>hbr>hi is the anwer check it once im not fullly confident

Answer 2

Hey dear,

● Answer -
Decreasing order of reactivity towards alkenes is -
HI > HBr > HCl > HF

● Explanation -
- Alkenes on treatment with hydrogen halides gives alkyl halides.
- As we go down group from F to I, electronegativity decreases. This weakens the H-X bonds going down the group.
- Thus HI bond is more susceptible to break.
- Therefore, alkenes react with HI easily than HF.

When hydrohalic acids are arranged in decreasing order of reactivity with alkenes -
HI > HBr > HCl > HF

Hope this helps you...