Dalda is prepared from oils by

Which of the following is the most stable alkene?

The reaction of $CH_3-CH=C(CH_3)-CH=CH_2$ with $(1) \ O_3$ followed by $(2) \ H_2O, Zn$ gives which products?

Write a test to detect the presence of a double bond in a molecule.

Identify the correct stability order of the following alkenes:
$I) (CH_3)_2C=C(CH_3)_2$
$II) (CH_3)_2C=CH_2$
$III) (CH_3)_2C=CHCH_3$

Two isomeric alkenes $A$ and $B$ have the molecular formula $C_5H_9Cl$. Upon hydrogenation,$A$ gives an achiral compound,while $B$ gives a chiral compound. Identify $A$ and $B$ respectively.