मराठी

Rolling of chapati and baking of chapati are the changes that ______.

प्रश्न

पर्याय

can be reversed.
cannot be reversed.
can be reversed and cannot be reversed, respectively.
cannot be reversed and can be reversed, respectively.

MCQ

रिकाम्या जागा भरा

उत्तर

Rolling of chapati and baking of chapati are the changes that can be reversed and cannot be reversed, respectively.

Explanation:

Rolling of chapati is a physical reversible change because there is no change in the properties of kneaded flour. Once the chapati is baked it cannot be reversed.

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Classification of Change: Reversible and Irreversible Changes

या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?

Q 6.Q 5.Q 7.

पाठ 6: Changes Around Us - Multiple Choice Questions [पृष्ठ ३३]

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एनसीईआरटी एक्झांप्लर Science [English] Class 6

पाठ 6 Changes Around Us
Multiple Choice Questions | Q 6. | पृष्ठ ३३

संबंधित प्रश्‍न

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

An example for reversible change is

Choose the odd one out. Give reason for your choice.

Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene

Touch me not plant: ______:: digestion of food: Irreversible change.

Which of the following change cannot be reversed?

Salt can be separated from its solution (salt dissolved in water), because ______.

Boojho’s sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? Justify your answer.

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.

Select the odd one out. Give reason for your the choice