Neha Sharma, Ajoy Ghatak and, Akanksha Dudpuri Solutions for Chapter: How Things Change, Exercise 3: EXERCISES
Neha Sharma Science Solutions for Exercise - Neha Sharma, Ajoy Ghatak and, Akanksha Dudpuri Solutions for Chapter: How Things Change, Exercise 3: EXERCISES
Attempt the free practice questions on Chapter 6: How Things Change, Exercise 3: EXERCISES with hints and solutions to strengthen your understanding. Start Up Science 6 solutions are prepared by Experienced Embibe Experts.
Questions from Neha Sharma, Ajoy Ghatak and, Akanksha Dudpuri Solutions for Chapter: How Things Change, Exercise 3: EXERCISES with Hints & Solutions
Doctors apply a thick coat of plaster of Paris (POP) over the bandage on a fractured bone. POP becomes hard on drying and keeps the fractured bone immobilised. Is it a reversible change?
Classify the following as reversible or irreversible changes.
(a) Sharpening of pencil (b) Evaporation of water (c) Curdling of milk
(d) Freezing of water (e) Rusting of iron (f) Blowing a balloon
(g) Opening of a bud (h) Dropping and breaking of a plastic toy
Converting milk into paneer is a reversible change.
Burning of coal is an irreversible change.
Burning of crackers is a slow change.
Letting air escape from the balloon is a fast change.
Solubility of salt increases with increase in temperature.
Match the two columns.
| Column A | Column B |
| 1. Colour change on ripening of fruit | (i) Decreases with temperature |
| 2. Increase in the height of a child | (ii) Present in small amount in solution |
| 3. Solubility of gases | (iii) Irreversible change |
| 4. Solubility of solids | (iv) Increases with temperature |
| 5. Solute | (v) Slow change |
