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 :

The electrons are more likely to be found :