An effervescence produced by adding dilute hydrochloric acid to solid. This is due to the presence of anion (negative ion)
Chloride
Iodide
Carbonate
Sulphate
The colour of barium ion in flame test is
lilac
green
yellow
apple green
Substances that will kill bacteria and so they fight diseases caused by bacteria are called
Tranquillisers
Anti-cancer agents
Sedatives
Antibiotic
Gases that are denser than air are collected by
Downward delivery
Upward delivery
Collection over water
Collection in a gas syringe
Any substance, natural or synthetic that changes the way in which our body works
Stimulant
Catalyst
Alkanes
Drug
The unsaturated compound can be tested using
Bromine water
Iodine water
Chlorine water
HCl