Trade Union Act came into force in:

What causes the permanent hardness of water?

Who invented the mercury thermometer?

Which substance is used to enhance x-ray and CT images?

Which one is the largest Island of Japan?

What is the zoological name for the common housefly?

Which principle allows chalk to write on a blackboard?

Match the following.

When red blood cells are placed in the three types of solution below, what will happen to the cell?

What element is primarily used in a Proton Fusion Engine?

Who discovered Penicillin?

What is the pH level of distilled water?