List two observations which you make when you add a pinch of soodium hydrogen carbonate to acetic acid in a test tube. Write the chemical equation for the reaction that occurs.

Write two observations that you will make when an iron nail is kept in an aqueous solution of copper sulphate. Write the chemical equations for this reactions.

What do you observe when you drop a piece of sodium into ethanol? Name the gas evolved. How do you test this gas? Write the chemical equation for the reaction.

What is observed when 2 mL of dilute hydrochloric acid is added to 1 g of sodium carbonate taken in a clean and dry test tube? Write chemical equation for the reaction involved.

What is observed when 2 mL of dilute hydrochloric acid is added to 1 g of sodium carbonate taken in a clean and dry test tube? Write chemical equation for the reaction involved.

A gas is liberated immeiately with a brisk effervescence, when you add acetic acid to sodium hydrogen carbonate power in a test tube. Name the gas and describe the test that confirms the identify of the gas.

A gas is liberated immeiately with a brisk effervescence, when you add acetic acid to sodium hydrogen carbonate power in a test tube. Name the gas and describe the test that confirms the identify of the gas.

(a) List two observations that are noticed when an iron nail is put inside copper sulphate solution. Write chemical equation for the reaction that occurs. (b) Explain two ways by which rancidity of food materials can be checked.