introduction reversible reactions

An _______ change cannot be undone because the change is permanent and generally creates a new substance.

• reversible

• irreversible

Which of these is not a reversible change

• Water to ice

• Juice to icelolly

• cookie dough to cookie

• Melting chocolate

What kind of change occurs if matter changes in amount, size, or shape?

• substance change

• physical change

• chemical change

• elemental change

What type of reactions can able to change products back to the their original form?

• reversible reactions

• irreversible reactions

• combustion reactions

• combination reactions

Which of the following combination is correct?

• reversible ⇌

  irreversible →

• reversible ←

  irreversible →

• reversible ⇌

  irreversible ←

• irreversible ⇌

  reversible →

Which of these is NOT a reversible change?

• 
• 
• 
• 

burning wood is ........... change

• Reversible

• Irreversible

Choose the TWO reversible changes:

• 
• 
• 
• 

Of the changes below, which is NOT an irreversible change:

• rusting

• cooking

• melting

• burning

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving