Chemistry Questionnaire

Which one of these is an example of metals?

• Phosphorus

• Gold

• Bromine

• Chlorine

Pure substance formed by chemical combination of two or more elements in a fixed ratio by mass.

Which method is used to separate miscible liquids?

The rate of sedimentation is decreased by loading.

• True

• False

Can element be broken down into simpler substance?

• True

• False

Which of the following are not considered as mixtures?

• Colloids

• Suspensions

• Compounds

• Solutions

Which of the following methods is used to separate distilled water from salt solution?

• Evaporation

• Distillation

• Crystallisation

This special device is used to separate two immiscible liquids. Name the device

Which of the following are immiscible liquids?

• juice and water

• honey and water

• hair-oil and water

• milk and tea

Which Swedish chemist was the first to use letter symbols for elements like the ones we use today?