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

Chemical reactions are example for

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प्रश्न

Chemical reactions are example for

विकल्प

  • reversible change

  • irreversible change

  • both of them

  • none of them

MCQ
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उत्तर

Irreversible change

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Science in Everyday Life - Evaluation [पृष्ठ १३७]

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सामाचीर कलवी Science - Term 1 [English] Class 5 TN Board
अध्याय 4 Science in Everyday Life
Evaluation | Q I. 4. | पृष्ठ १३७

संबंधित प्रश्न

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


Match the following.

Bud to flower Dr. A.P.J. Abdul Kalam
Reversible change Recyclable waste
India 2020 Organic waste
Paper Melting of ice
Vegetables Irreversible change

Burning of match stick is a reversible change.


When a candle is lit the following changes are observed.

  1. Wax melts.
  2. Candle keeps burning.
  3. The size of the candle decreases.
  4. The molten wax solidifies
  5. Which of the changes can be reversed? Justify your answer

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


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

Curd into milk


Give one example of change which occurs on heating but can be reversed.


Give one example of change which occurs on mixing two substances, but 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:

  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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