Question

2. Identify the odd term out and explain.
a. Gold, silver, copper, brass
b. Hydrogen, hydrogen peroxide, carbon
dioxide, water vapour.
c. Milk, lemon juice, carbon, steel.
d. Water, mercury, bromine, petrol.
e. Sugar, salt, baking soda, blue vitriol.
f. Hydrogen, sodium, potassium, carbon.​

Answer 1

1. brass
2. hydrogen peroxide
3. steel
4. water
5. carbon