Materials and Chemical reaction

When water is heated, it turns into a gas water vapor. Is this a chemical reaction? Why?

• Yes, because changes in states are chemical reaction.

• Yes, because a new substance is formed.

• No, becauce changes in states is physical change

• No, because when water heated it stays as water.

Which of the following changes causes chemical reaction?

• Changes in shape

• Changes in size

• Changes in states

• Changes in properties

What are the products of METAL + ACID chemical reaction?

• Salt and water

• Salt and Hydrogen gas

• Salt and Carbon dioxide

• Water and Hydrogen gas

What is the process in which monomers are joined together in a chemical reaction called?

• Polymer

• Monomer

• Polymerization

• Ceramics

It will formed when 2 or more substances undergo chemical reaction.

• Reactants

• Products

• Compound

• Chemical formula

Which of the following chemical formula is NOT an ACID?

• H₂SO₄ 

• HCl

• HNO₃

• CuSO₄

____________ are substances give out hydrogen ions and has a pH level of less than 7 called?

• Acid

• Base

• Alkali

• Chemical reaction

What are the starting substances in a chemical reaction called?

• Reactants

• Products

• Reaction

• Chemical

What are the substances that something can be dissolve in water called?

• Solid

• Liquid

• Gas

• Aquaeous

What is the indication of arrow in a chemical equation?

• To separate reactants and products

• To separate the Products

• To separate the reactants

• To separate the substances