Chemical changes Grade 7 quiz (rust, raections etc)

What is the Reddish - Brown Substance we can see on Iron

• Copper Sulphate

• Iron

• Rust

• Baking Soda

The brown pigment called _________ is produced on a fruit or vegetable. Which is due to some ________ reaction

Which of the following is the chemical word equation for the reaction between Vinegar and Baking soda?

• Vinegar+Baking Soda+Calcium Carbonate------> Water

• Vinegar+Baking Soda------> Water + Carbondioxide + Sodium acetate

• Vinegar+Baking Soda--------------> Calcuim Carbonate

Write the chemical word equation for Rusting of Iron

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Write the chemical word equation for reaction between Copper Sulphate and Iron

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How can we prove that the gas that is released after the reaction between Vinegar and Baking Soda is Carbon Dioxide? Write the chemical word equation

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