Butadiene exhibits a higher value of lambda max for pi to pi* transition than that of ethylene.

This is because butadiene has a longer conjugated system of double bonds compared to ethylene. The longer the conjugated system, the lower the energy required for the pi to pi* transition, resulting in a higher value of lambda max. Additionally, the presence of multiple double bonds in butadiene allows for more electron delocalization, further lowering the energy required for the transition.

True