हिंदी
तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ५

Differentiate reversible and irreversible changes.

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प्रश्न

Differentiate reversible and irreversible changes.

अंतर स्पष्ट करें
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उत्तर

Reversible Change Irreversible Change
A substance can turn to its original state. A substance cannot change to its original state.
The chemical properties of the substance do not change. The chemical properties of the substance will change.
Most of the physical changes are reversible. All chemical changes are irreversible.
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अध्याय 4: Science in Everyday Life - Evaluation [पृष्ठ १३८]

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सामाचीर कलवी Science - Term 1 [English] Class 5 TN Board
अध्याय 4 Science in Everyday Life
Evaluation | Q V. 3. | पृष्ठ १३८

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  

Magnet attracts iron needle.This is ______ change.


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

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


Periodical removal of one of the products of a reversible reaction increases the yield.


Dissolving sugar in water is a ______ change.


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


An iron ring is heated. Which of the following statement about it is incorrect?


Change of a bud into a flower is a change which cannot be reversed. Give four more such example.


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:

  1. Simba blew balloons and put them on the wall.
  2. Some of the balloons got burst.
  3. Paheli cut colourful strips of paper and put them on the wall with the help of tape.
  4. She also made some flowers by origami (paper folding) to decorate the house.
  5. Her father made dough balls.
    Mother rolled the dough balls to make puries.
  6. Mother heated oil in a pan.
  7. 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.


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


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