Identify which of the processes below are non-spontaneous and state if the non-spontaneous processes are impossible.
i. water falling from waterfalls
ii. riding a skateboard uphill
iii. boiling of water
iv. turning graphite into diamond

• A. iv only, yes
• B. ii and iv, no
• C. i only, no
• D. ii,iii and iv, no

Answer: (D)