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 :

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

An element has a face-centred cubic (fcc) structure with a cell edge of $$a$$. The distance between the centres of two nearest tetrahedral voids in the lattice is :

In the following reaction; xA $$ \to $$ yB
$${\log _{10}}\left[ { - {{d\left[ A \right]} \over {dt}}} \right] = {\log _{10}}\left[ {{{d\left[ B \right]} \over {dt}}} \right] + 0.3010$$
'A' and 'B' respectively can be :