Carbon-oxygent bond in ethers can be cleaved b halogen acids, sulphuric acid, phosphorus pentachlodie, etc. The cleavage of C-O bond take place under drastic conditions with excess of hydrogen halides.
`R-O-R+2HX rarr 2RX +H_(2)O`
If hydrogen halide is not taken in excess then a molecule of alcohol and alkyl halide are formed.
`R-O-R+HI overset(373K) (rarr) R-OH+R-I`
The order of reactivity of hydrogen halides towards the given reaction depends on the bond strength of halogenated acids, weaker is the H-X bond, greter is its reactivity. In case of unsymmetrical ethers, the site of cleavage is such that the halide is formed from the alkyl group which is smaller in size. However, when one of the alkyl group is tertiary, the halide formed is the tertiary halide.
Indiate wheterh the following statements `//` reactions are true or false.
Hydrogen fluoride (HF) is not effective in ether cleavage.
(a) True (b) False

Answer

A