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Can we reverse the following change? If yes, suggest the name of the method. Water into water vapour

Question

Can we reverse the following change? If yes, suggest the name of the method.

Water into water vapour

One Line Answer

Solution

Yes, by condensation water vapour can be converted to water.

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Classification of Change: Reversible and Irreversible Changes

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Q 11. (a)Q 10.Q 11. (b)

Chapter 6: Changes Around Us - Short Answer Questions [Page 34]

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NCERT Exemplar Science Exemplar [English] Class 6

Chapter 6 Changes Around Us
Short Answer Questions | Q 11. (a) | Page 34

RELATED QUESTIONS

Very Short Answer Type Question:
Some common changes are given in the below Table. Which of these changes do you think can be reversed?

Change	Can be reversed
(i) Raw egg to boiled egg	Yes/No
(ii) Batter to idli
(iii) Wet clothes to dirty clothes
(iv) Woollen yarn to knitted sweater
(v) Grain to its flour
(vi) Cold milk to hot milk
(vii) straight string to a cold string
(viii) Bud to flower
(ix) Milk to paneer
(x) Cow dung to biogas
(xi) stretched rubber band to its normal size
(xii) Melting of ice-cream

Short Answer Type Question:
What is a physical change? Explain with example.

Differentiate reversible and irreversible changes.

Burning of match stick is a reversible change.

Analogy

Curdling of milk : irreversible change :: Formation of clouds : ________change

To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

Give one example of change which occurs on cooling but can 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.

lt was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli’s home:

Simba blew balloons and put them on the wall.
Some of the balloons got burst.
Paheli cut colourful strips of paper and put them on the wall with the help of tape.
She also made some flowers by origami (paper folding) to decorate the house.
Her father made dough balls.
Mother rolled the dough balls to make puries.
Mother heated oil in a pan.
Father fried the puries in hot oil.

Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed.

Find the odd one out and give reason for your choice.