Question:
Identify the substance which can dissolve in water:
(A) Glucose
(B) Urea
(C) Acetone
(D) All of the above
Answer:
(D) All of the above
Explanation:
1. Glucose (Option A):
- Glucose dissolves in water because it has parts that like water.
- These parts can stick to water molecules, making it mix well with water.
2. Urea (Option B):
- Urea is like glucose in that it also has parts that like water.
- When you put urea in water, it mixes well because these parts can stick to water molecules.
3. Acetone (Option C):
- Acetone is a bit different.
- It can mix a little with water, but not as well as glucose and urea.
- Its parts don't stick to water as strongly, so it doesn't dissolve in water as easily.
So, glucose and urea dissolve well in water because they can stick to water molecules strongly, but acetone doesn't mix as easily because its parts don't stick to water as much. Therefore, all of the above substances can dissolve in water, making the answer (D) All of the above.