The order of reactivity of the following alcohols

`underset(III)(CH_(3)-CH_(2)-overset(CH_(3))overset(|)(CH)-OH)` , `underset(IV)(OH-CH_(2)-overset(CH_(3))overset(|)(CH)-CH_(3))`
towards hydrogen halide is

Give the common names of the following alcohols : CH_(3)CH_(2)overset(CH_(3))overset(|)(CH)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(2)OH

CH_(3)CHOHCH_(2)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-OH

CH_(3)-underset(CH_(3))underset(|)(CH)-CH=CH-CH_(2)-overset(O)overset(||)(C)-OH

CH_(3)-CH_(2)-CH_(2)overset(OH)overset(|)CH_(2) and CH_(3)-underset(CH_(3))underset(|)overset(OH)overset(|)(OH)-CH_(3)

The relative stability of the compounds underset(I)(CH_(3)-overset(CH_(3))overset(|)(C)=overset(CH_(3))overset(|)(C)-CH_(3)) underset(I)(CH_(3)-overset(CH_(3))overset(|)(C)=CH-CH_(3)) underset(IV)(CH_(2)=CH_(2)) is in the order-

The IUPAC name of CH_(3)-underset(CH_3)underset(|)overset(OH)overset(|)"C"-CH_(2)-overset(OH)overset(|)"CH"-CH_(3) is

The IUPAC name for CH_(3) - underset(OH)underset(|)(CH) - CH_(2) - underset(OH)underset(|)overset(CH_(3))overset(|)(C) - CH_(3) is:

The IUPAC name for CH_(3) - underset(OH)underset(|)(CH) - CH_(2) - underset(OH)underset(|)overset(CH_(3))overset(|)(C) - CH_(3) is: