Haloform

A substance C_(5)H_(10)O does not reduce Fehling's solution, forms a phenylhdrazone, shows the haloform reaction, and can be converted into n-pentane by strong reduction. The structure formula of the original substance is:

Claisen Condensation Reaction using Examples, Intramolecular Claisen Reaction|| HalOForm Reactions (ChlorOForm, BromOForm, IodOForm)||IodOForm Test and Examples|| Alpha-Halogenation (acidic medium) and Examples

Compound having -overset(O)overset(||)C-CH_(3) group reacts rapidly with halogen in presence of a base to form haloform . The reaction is known as haloform. R-overset(O)overset(||)C-CH_(3)overset(X_(2)+overset(Ө)OH)rarrR-overset(O)overset(||)C-overset(Ө)O+CHX_(3) Mechanism : Which of the following is correct comparison of rate of haloform reaction with various haloform reaction with various halogens ?