Zinc and Sulfuric Acid Reactions

The video tutorial demonstrates the reaction between zinc and dilute sulfuric acid, aiming to classify it as a physical or chemical change. It covers the necessary apparatus, theoretical principles, and detailed procedures. Observations include gas evolution and its properties, leading to the conclusion that zinc reacts with sulfuric acid to form zinc sulfate and hydrogen gas.

What is the main aim of the experiment?

• To study the reaction between zinc and hydrochloric acid

• To study the reaction between zinc and acetic acid

• To study the reaction between zinc and dilute sulfuric acid

• To study the reaction between zinc and nitric acid

What is the first step in the procedure after washing the zinc granules?

• Heat the zinc granules

• Add dilute sulfuric acid

• Add concentrated sulfuric acid

• Add water

What observation is made when zinc reacts with dilute sulfuric acid?

• No reaction occurs

• Bubbles of gas are released

• The zinc granules dissolve immediately

• The solution turns blue

What is the smell of the gas evolved during the reaction?

• It has a pungent smell

• It has a sweet smell

• It is odorless

• It smells like rotten eggs

What is the color of the gas evolved during the reaction?

• Colorless

• Blue

• Yellow

• Green

What inference is drawn about the gas when it does not change the color of litmus papers?

• The gas is neutral

• The gas is basic

• The gas is acidic

• The gas is toxic

What sound is heard when a burning candle is held at the mouth of the test tube?

• A crackling sound

• A pop sound

• A hiss sound

• No sound

What is the gas evolved during the reaction?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon dioxide

What happens to the zinc granules after some time?

• They form a precipitate

• They remain unchanged

• They dissolve completely

• They turn black

What compound is formed when zinc reacts with sulfuric acid?

• Zinc chloride

• Zinc nitrate

• Zinc sulfate

• Zinc acetate