The ionisation energy question asked for why Strontium has a lower ionisation energy than Magnesium, you should get the marks.
For the conditions questions I just said high temp, high pressures and H3PO4 catalyst, I'm sure they won't penalise if you mess up the specifics on the conditions.
The pent-1-ene question really messed me up, I just drew the C3H7 group above and below for E and Z isomerism, I definitely got it wrong I think.