Here are few tips to score good marks in practicals:
i. Maintain well practical record books.
ii. Give good demonstration and explanations.
iii. Should work according to time management.
iv. Should have good subject knowledge to answer while viva.
v. Lay emphasis on the underlying principles for each practical.
vi. Tabulate all results precisely with appropriate units.
vii. Report all negative results in the salt analysis.
viii. Write appropriate valencies for cations and anions.
ix. Make no errors while recording the readings.