What are the reasons behind each laboratory safety rule?

Here are the reasons for each laboratory rule:

a) Do not use chemicals excessively: To minimize waste and reduce potential hazards from large quantities.

b) Do not wash your hand with any unknown liquid: To prevent skin irritation, burns, or absorption of toxic substances.

c) Close all taps before leaving the laboratory: To prevent water wastage and avoid flooding.

d) Spilled liquids must be cleaned immediately from the floor: To prevent slips, falls, and contamination.

e) Do not walk barefooted in the laboratory: To protect feet from broken glass, chemical spills, or falling objects.

f) Do not drink any unknown liquid in the laboratory: To prevent accidental poisoning from toxic or corrosive substances.

g) Do not smell any unknown gas with the nose very close to the gas: To avoid inhaling toxic or irritating fumes directly.

h) Do not add water to concentrated acids when diluting the acids: To prevent a violent exothermic reaction that can cause splashing and burns.

i) Do not work with a broken test tube: To prevent cuts and ensure the integrity of the experiment.
j) Step down the mains voltage (240V) before use in experiments with small light bulbs in the circuit: To prevent electric shock and avoid burning out the light bulbs.
k) Do not smoke in the laboratory: To prevent fires or explosions and avoid contamination of experiments.
l) When using Bunsen burner strike the match first before turning the gas on and not vice versa: To prevent gas buildup which could lead to an explosion or flashback.
m) Do not eat in the laboratory: To prevent ingestion of chemicals and contamination of food.
n) Always prepare poisonous gases in fume chamber: To contain and vent toxic gases safely, protecting the user and others from inhalation.