What do you observe when :1. water is boiled2. a piece of paper is bur

1.	What do you observe when :1. water is boiled2. a piece of paper is burnt3. some ice cubes are kept in a glass tumbler4. solid ammonium chloride is heated5. an iron nail is kept in tap water for few days
Answer» 1. water is boiled On boiling water changes into steam (gas) physical change. 2. a piece of paper is burnt On burning piece of paper produces carbon dioxide and ash is left behind. Is a chemical change. 3. some ice cubes are kept in a glass tumbler Ice cubes (solid) turn into water (liquid) only state changes (physical change). 4. solid ammonium chloride is heated Solid ammonium chloride on heating changes into vapors (change of state) is the physical change. 5. an iron nail is kept in tap water for a few days We observe reddish-brown coating on the nail called rust (entirely new substance) is chemical change.

What do you observe when :1. water is boiled2. a piece of paper is burnt3. some ice cubes are kept in a glass tumbler4. solid ammonium chloride is heated5. an iron nail is kept in tap water for few days

Answer»

1. water is boiled

On boiling water changes into steam (gas) physical change.

2. a piece of paper is burnt

On burning piece of paper produces carbon dioxide and ash is left behind. Is a chemical change.

3. some ice cubes are kept in a glass tumbler

Ice cubes (solid) turn into water (liquid) only state changes (physical change).

4. solid ammonium chloride is heated

Solid ammonium chloride on heating changes into vapors (change of state) is the physical change.

5. an iron nail is kept in tap water for a few days

We observe reddish-brown coating on the nail called rust (entirely new substance) is chemical change.