Decreasing order of boiling points in organic chemistry.
For the same alkyl group, the order of boiling points for various functional groups in organic chemistry is as follows:
RCOOH > RNO2 > RCN > RI > RCOCl > RCOOCH2 > ROH > RCHO > RBr > RSH > RNH2 = RCl > ROCH3 > RF > R-H
Here, R is n- butyl.