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

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

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