HARD
6th CBSE
IMPORTANT
Earn 100

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?
 

Important Questions on How Things Change

MEDIUM
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q B
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
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
Converting milk into paneer is a reversible change.
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
Burning of coal is an irreversible change.
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
Burning of crackers is a slow change.
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
Letting air escape from the balloon is a fast change.
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
Solubility of salt increases with increase in temperature.
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
Condensation of steam is a _____ change.
EASY
6th CBSE
IMPORTANT
Start Up Science 6>Chapter 6 - How Things Change>EXERCISES>Q C
In _____ change, the initial substance cannot be obtained back.