Spark of Science 6 Unit 2 revision

What color does litmus paper turn in an acidic solution?

• Red

• Yellow

• Green

• Blue

What color does litmus paper turn in a basic solution?

• Red

• Green

• Yellow

• Blue

What is the chemical symbol for Hydrogen?

• H

• He

• O

• N

What is the chemical symbol for Oxygen?

• Ox

• O2

• O

• O3

What are the elements of the water compound ?

• Hydrogen, Oxygen

• Hydrogen, Chlorine

• Carbon, Hydrogen, Oxygen

• Oxygen and chlorine

What is the chemical formula for water?

• O2H

• HO2

• H2O2

• H2O

What elements make up table salt?

• Iron and sulfur

• Calcium and magnesium

• Sodium and chlorine

• Sodium and potassium

What is the chemical formula for carbon dioxide?

• CO2

• CO

• CO3

• C2O

What is the type of matter made of a combination of elements?

• Element

• Compound

• Indicator

• Acid

Which of the following is an example of base?

• Lemon Juice

• Vinegar

• Baking soda

• Tomato juice