solutions

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 changes is irreversible change?

• Melting of ice cube

• Heating hydrated CuSO₄

• Frying an egg

• Thermal decomposing NH₄Cl

Which of these is NOT a reversible change?

• Water to Ice
• Juice to ice lolly
• Cookie Dough to Cookie
• Melting Chocolate

A temperature increase causes the particles ......

• to slow down

• move faster

• collide higher

• in the right order

Why is a reaction described as reversible?

• The products cannot be turned directly back into the reactants.

• You need to apply heat to make the reaction work.

• The products can be turned back into the reactants.

• The reactants cannot be turned into the products.

Which of these is NOT a reversible change?

• Water to Ice
• Juice to ice lolly
• 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

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

• Reversible

• Irreversible

Choose the TWO reversible changes:

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