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Question
Choose the odd one out. Give reason for your choice.
Options
Inflating a balloon
popping a balloon
fading of wall paint
burning of kerosene
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Solution
Inflating a balloon
Reason: Inflating a balloon is a reversible change. The other three are irreversible changes.
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Short Answer Type Question:
What happens when sugar is heated?
Magnet attracts iron needle.This is ______ change.
Burning of match stick is a reversible change.
Differentiate reversible and irreversible reactions.
Name the two types of changes.
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
Rolling of chapati and baking of chapati are the changes that ______.
Give one example of change which occurs on heating but cannot be reversed.
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
Find the odd one out. Give reason for your choice.
