Answer:
it should be the second one since London dispersion causes interaction between molecules.
hope I helped.
Answer:
No. No new substance is formed during Physical change.
Had to look for the options and here is my answer.
When we say that a redox reaction is spontaneous, this would mean that there is a formation of positive voltage <span>across the electrodes of a voltaic cell. Therefore, the system that this kind of reaction produces electrical energy is in a GALVANIC CELL. Hope this helps.</span>
The answer is A warm air rises cool air sinks
