The major product of the following addition reaction is :
H₃C–CH=CH₂ $$\buildrel {C{l_2}/{H_2}O} \over \longrightarrow $$

An ideal gas is allowed to expand form 1 L to 10 L against a constant external pressure of I bar. The work done in kJ is :

But-2-ene on reaction with alkaline KMnO₄ at elevated temperature followed by acidification will give :

The mole fraction of a solvent in aqueous solution of a solute is 0.8. The molality (in mol kg^–1 ) of the aqueous solution is :