Procedure:
1. Place a coin near the center of a shallow glass.
2. Gently pour the water into the glass. Look down at the coin. How did the appearance of the coin change as you added water?
3. Remove the coin and place a pencil in the glass of water. Add enough water to cover about one-third of the pencil. How does the pencil look after water is added, when viewed from above? When viewed from the side, how does the pencil appear?
Report your observations and answers to the questions below.
How did the appearance of the coin change as you added water?
How does the pencil look after water is added, when viewed from above?
When viewed from the side, how does the pencil appear?
How can you explain the difference?
Answers
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Answer:
5. Assertion (A):In electrolysis of water, the volume of hydrogen liberated is twice the volume of oxygen formed.Reason (R):Water (HO) has hydrogen and oxygen in the ratio of 1:2 by volume.6. Assertion(A):Corrosion of iron is commonly known as rusting.Reason (R):Corrosion of iron occurs in presence of water and air7. Assertion(A):The balancing of chemical equations is based on law of conservation of mass.Reason (R):Total mass of reactants is equal to total mass of products
Explanation:
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