Question

what are the most important topics of hydrocarbons chapter class 11 chemistry?​

Answer 1

all the named reactions are important

Answer 2

CLASSIFICATION OF HYDROCARBONS

�Cycloalkenes��Cycloalkynes C�C bond

Forms of carboxylic acid

Physical Properties:-

(1)�Nature:- Non-Polar due to covalent nature of C�C bond and C�H bond. C� C bond enrgy = 83 kj/mole and C�H bond energy = 99 kj/mole. C1�C4 = gases, C5�C17 = colourless odourless liq uid and > C17 = Solid.

(2) Solubility :- Like dissolve like Viz, Polar compounds dissolve in polar solvent and Non-Polar compound dissolve in non polar solvent.

(3) Boiling point :- Low boiling point due to non polar in nature The molecules are held together only by weak Van der Waalls� forces.

Since we known that the�magnitude�of�Van�der Waalls��forces�is�directly proportional to�the molecular size.�Therefore, the boiling point�increases with increase the molecular size i.e. with increase in number of carbon atoms.

Noted :- the boiling points of the branched chain Alkanes are less than the straight chain isomers.

This is due to the fact that branching of the chain makes the molecule more compact and thereby decreases the surface aria and consequently, the magnitudes of Van der Waalls� forces also decrease.