Chemical vs. Physical Change Explained
A chemical change results in the formation of new substances with different chemical properties. A physical change alters the form or appearance of a substance but does not change its chemical composition.
Analyzing the Options
Let's examine each option to determine if it's a chemical or physical change:
- Cooking an egg: Heat causes proteins in the egg to denature and change irreversibly, forming new chemical bonds. This is a chemical change.
- Melting an ice cube: Solid water (ice) changes into liquid water. The chemical formula (H2O) remains the same. Only the state changes. This is a physical change.
- Baking a cake: Ingredients undergo complex chemical reactions when heated, resulting in new substances with different textures and flavors. This is a chemical change.
- Rotting bananas: Decomposition by microorganisms involves chemical reactions that break down the banana's tissues and change its chemical makeup. This is a chemical change.
Conclusion
Based on the analysis, melting an ice cube is a physical change because it only alters the state of water without changing its chemical identity. The other options involve the formation of new substances.
Therefore, Melting an ice cube is not a chemical change.
Similar Questions
- Which chemical process results in the formation of plaque on copper, the rusting of iron and the blackening of silver?
- What is oxidization?
- With which substance does silver react and turn black?
- Which of the following determines that a chemical reaction has not taken place?
- Which of the following solutions has the highest concentration of hydrogen ions?
- Which of the following product is formed due to burning of a magnesium ribbon with a spirit lamp?
- Decomposition of calcium carbonate to calcium oxide and carbon dioxide on heating is an example of ____.
During the electrolysis of water, hydrogen and oxygen are released in which ratio?
When dilute Hydrochloric acid (HCl) reacts with Sodium Hydrogen Carbonate (NaHCO3), which is the product formed along with Sodium chloride (NaCl) and Water (H2O)?
Which metal reacts violently with cold water, producing a metal hydroxide, hydrogen gas, and enough heat for the hydrogen to catch fire?
Important Questions from Chemical Reaction
- Which one of the following is not an example of a redox reaction?
- Which one of the following is not a pigment?
- Which one of the following reactions is an example of decomposition reaction?
Match List I with List II and select the correct answer using the code given below the Lists:
LIST I
(Chemical process)
LIST II
(Reaction)
A.
Electrolysis of water
1.
Double displacement
reactionB.
Burning of coal
2.
Combination reaction
C.
Iron nail immersed in copper sulphate solution
3.
Decomposition reaction
D.
Addition of barium chloride solution to aluminium sulphate solution
4.
Displacement reaction
Consider the following reaction:
Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s)
Which of the following statements about the given reaction is NOT correct?
