What are homogeneous mixtures? Explain with examples.

What are heterogeneous mixtures? Give two examples.

Define compound. Give three examples of compounds.

Which will boil at a higher temperature tap water or sea water?

What will happen to melting point of ice if some common salt is added to it?

What is the difference between a pure substance and a mixture ? Give one example in each case.

Name two solid, two liquid and two gaseous elements at room temperature.

What are the three types in which all the elements are classified ? Name two elements belonging to each group.

Classify the following into metals, non-metals, and metalloids

mercury, diamond, carbon, silicon, copper, helium, magnesium, sodium, boron, germanium.