Copper and Nitric Acid Reactions

The video demonstrates the reaction of a penny with concentrated Nitric acid, forming green Cu(NO3)2 and brown NO2 gas. The reaction generates heat, and the excess Nitric acid is neutralized using baking soda. Safety measures are in place to handle the NO2 gas.

What is the initial product formed when a penny is added to concentrated Nitric acid?

• Cu(NO3)2

• NO2

• H2O

• O2

What is the color of the gas that forms bubbles during the reaction?

• Blue

• Brown

• Green

• Red

What happens to the test tube as the reaction between copper and nitric acid progresses?

• It cools down

• It remains the same temperature

• It gets warm

• It freezes

How is the excess NO2 gas managed during the reaction?

• It is captured in a balloon

• It is dissolved in water

• It is safely removed by a fan

• It is absorbed by a sponge

What substance is used to neutralize the excess Nitric acid?

• Salt

• Baking soda

• Lemon juice

• Vinegar